CVE-2021-47169 (GCVE-0-2021-47169)

Vulnerability from cvelistv5 – Published: 2024-03-25 09:16 – Updated: 2025-12-18 11:35
VLAI?
Title
serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait'
Summary
In the Linux kernel, the following vulnerability has been resolved: serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait' In 'rp2_probe', the driver registers 'rp2_uart_interrupt' then calls 'rp2_fw_cb' through 'request_firmware_nowait'. In 'rp2_fw_cb', if the firmware don't exists, function just return without initializing ports of 'rp2_card'. But now the interrupt handler function has been registered, and when an interrupt comes, 'rp2_uart_interrupt' may access those ports then causing NULL pointer dereference or other bugs. Because the driver does some initialization work in 'rp2_fw_cb', in order to make the driver ready to handle interrupts, 'request_firmware' should be used instead of asynchronous 'request_firmware_nowait'. This report reveals it: INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.19.177-gdba4159c14ef-dirty #45 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59- gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xec/0x156 lib/dump_stack.c:118 assign_lock_key kernel/locking/lockdep.c:727 [inline] register_lock_class+0x14e5/0x1ba0 kernel/locking/lockdep.c:753 __lock_acquire+0x187/0x3750 kernel/locking/lockdep.c:3303 lock_acquire+0x124/0x340 kernel/locking/lockdep.c:3907 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x32/0x50 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] rp2_ch_interrupt drivers/tty/serial/rp2.c:466 [inline] rp2_asic_interrupt.isra.9+0x15d/0x990 drivers/tty/serial/rp2.c:493 rp2_uart_interrupt+0x49/0xe0 drivers/tty/serial/rp2.c:504 __handle_irq_event_percpu+0xfb/0x770 kernel/irq/handle.c:149 handle_irq_event_percpu+0x79/0x150 kernel/irq/handle.c:189 handle_irq_event+0xac/0x140 kernel/irq/handle.c:206 handle_fasteoi_irq+0x232/0x5c0 kernel/irq/chip.c:725 generic_handle_irq_desc include/linux/irqdesc.h:155 [inline] handle_irq+0x230/0x3a0 arch/x86/kernel/irq_64.c:87 do_IRQ+0xa7/0x1e0 arch/x86/kernel/irq.c:247 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670 </IRQ> RIP: 0010:native_safe_halt+0x28/0x30 arch/x86/include/asm/irqflags.h:61 Code: 00 00 55 be 04 00 00 00 48 c7 c7 00 c2 2f 8c 48 89 e5 e8 fb 31 e7 f8 8b 05 75 af 8d 03 85 c0 7e 07 0f 00 2d 8a 61 65 00 fb f4 <5d> c3 90 90 90 90 90 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 RSP: 0018:ffff88806b71fcc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffde RAX: 0000000000000000 RBX: ffffffff8bde7e48 RCX: ffffffff88a21285 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8c2fc200 RBP: ffff88806b71fcc8 R08: fffffbfff185f840 R09: fffffbfff185f840 R10: 0000000000000001 R11: fffffbfff185f840 R12: 0000000000000002 R13: ffffffff8bea18a0 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x6f/0x360 arch/x86/kernel/process.c:557 arch_cpu_idle+0xf/0x20 arch/x86/kernel/process.c:548 default_idle_call+0x3b/0x60 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x2ab/0x3c0 kernel/sched/idle.c:263 cpu_startup_entry+0xcb/0xe0 kernel/sched/idle.c:369 start_secondary+0x3b8/0x4e0 arch/x86/kernel/smpboot.c:271 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 PGD 8000000056d27067 P4D 8000000056d27067 PUD 56d28067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.19.177-gdba4159c14ef-dirty #45 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59- gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline] RIP: 0010:rp2_ch_interrupt drivers/tty/serial/rp2.c:472 [inline] RIP: 0010:rp2_asic_interrupt.isra.9+0x181/0x990 drivers/tty/serial/rp2.c: 493 Co ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < 1e04d5d5fe5e76af68f834e1941fcbfa439653be (git)
Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < c697244ce940ec07e2d745ccb63ca97fc0266fbc (git)
Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < 1cc57cb32c84e059bd158494f746b665fc14d1b1 (git)
Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < 35265552c7fe9553c75e324c80f45e28ff14eb6e (git)
Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < 915452f40e2f495e187276c4407a4f567ec2307e (git)
Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < 6a931ceb0b9401fe18d0c500e08164bf9cc7be4b (git)
Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < 9b07b6973f7359e2dd6a9fe6db0c142634c823b7 (git)
Affected: 7d9f49afa451d8565d00a5cea39acf9bb26feb50 , < 016002848c82eeb5d460489ce392d91fe18c475c (git)
Create a notification for this product.
    Linux Linux Affected: 3.9
Unaffected: 0 , < 3.9 (semver)
Unaffected: 4.4.271 , ≤ 4.4.* (semver)
Unaffected: 4.9.271 , ≤ 4.9.* (semver)
Unaffected: 4.14.235 , ≤ 4.14.* (semver)
Unaffected: 4.19.193 , ≤ 4.19.* (semver)
Unaffected: 5.4.124 , ≤ 5.4.* (semver)
Unaffected: 5.10.42 , ≤ 5.10.* (semver)
Unaffected: 5.12.9 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: rp2: use \u0027request_firmware\u0027 instead of \u0027request_firmware_nowait\u0027\n\nIn \u0027rp2_probe\u0027, the driver registers \u0027rp2_uart_interrupt\u0027 then calls\n\u0027rp2_fw_cb\u0027 through \u0027request_firmware_nowait\u0027. In \u0027rp2_fw_cb\u0027, if the\nfirmware don\u0027t exists, function just return without initializing ports\nof \u0027rp2_card\u0027. But now the interrupt handler function has been\nregistered, and when an interrupt comes, \u0027rp2_uart_interrupt\u0027 may access\nthose ports then causing NULL pointer dereference or other bugs.\n\nBecause the driver does some initialization work in \u0027rp2_fw_cb\u0027, in\norder to make the driver ready to handle interrupts, \u0027request_firmware\u0027\nshould be used instead of asynchronous \u0027request_firmware_nowait\u0027.\n\nThis report reveals it:\n\nINFO: trying to register non-static key.\nthe code is fine but needs lockdep annotation.\nturning off the locking correctness validator.\nCPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.19.177-gdba4159c14ef-dirty #45\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-\ngc9ba5276e321-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cIRQ\u003e\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0xec/0x156 lib/dump_stack.c:118\n assign_lock_key kernel/locking/lockdep.c:727 [inline]\n register_lock_class+0x14e5/0x1ba0 kernel/locking/lockdep.c:753\n __lock_acquire+0x187/0x3750 kernel/locking/lockdep.c:3303\n lock_acquire+0x124/0x340 kernel/locking/lockdep.c:3907\n __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]\n _raw_spin_lock+0x32/0x50 kernel/locking/spinlock.c:144\n spin_lock include/linux/spinlock.h:329 [inline]\n rp2_ch_interrupt drivers/tty/serial/rp2.c:466 [inline]\n rp2_asic_interrupt.isra.9+0x15d/0x990 drivers/tty/serial/rp2.c:493\n rp2_uart_interrupt+0x49/0xe0 drivers/tty/serial/rp2.c:504\n __handle_irq_event_percpu+0xfb/0x770 kernel/irq/handle.c:149\n handle_irq_event_percpu+0x79/0x150 kernel/irq/handle.c:189\n handle_irq_event+0xac/0x140 kernel/irq/handle.c:206\n handle_fasteoi_irq+0x232/0x5c0 kernel/irq/chip.c:725\n generic_handle_irq_desc include/linux/irqdesc.h:155 [inline]\n handle_irq+0x230/0x3a0 arch/x86/kernel/irq_64.c:87\n do_IRQ+0xa7/0x1e0 arch/x86/kernel/irq.c:247\n common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670\n \u003c/IRQ\u003e\nRIP: 0010:native_safe_halt+0x28/0x30 arch/x86/include/asm/irqflags.h:61\nCode: 00 00 55 be 04 00 00 00 48 c7 c7 00 c2 2f 8c 48 89 e5 e8 fb 31 e7 f8\n8b 05 75 af 8d 03 85 c0 7e 07 0f 00 2d 8a 61 65 00 fb f4 \u003c5d\u003e c3 90 90 90\n90 90 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41\nRSP: 0018:ffff88806b71fcc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffde\nRAX: 0000000000000000 RBX: ffffffff8bde7e48 RCX: ffffffff88a21285\nRDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8c2fc200\nRBP: ffff88806b71fcc8 R08: fffffbfff185f840 R09: fffffbfff185f840\nR10: 0000000000000001 R11: fffffbfff185f840 R12: 0000000000000002\nR13: ffffffff8bea18a0 R14: 0000000000000000 R15: 0000000000000000\n arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]\n default_idle+0x6f/0x360 arch/x86/kernel/process.c:557\n arch_cpu_idle+0xf/0x20 arch/x86/kernel/process.c:548\n default_idle_call+0x3b/0x60 kernel/sched/idle.c:93\n cpuidle_idle_call kernel/sched/idle.c:153 [inline]\n do_idle+0x2ab/0x3c0 kernel/sched/idle.c:263\n cpu_startup_entry+0xcb/0xe0 kernel/sched/idle.c:369\n start_secondary+0x3b8/0x4e0 arch/x86/kernel/smpboot.c:271\n secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243\nBUG: unable to handle kernel NULL pointer dereference at 0000000000000010\nPGD 8000000056d27067 P4D 8000000056d27067 PUD 56d28067 PMD 0\nOops: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.19.177-gdba4159c14ef-dirty #45\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-\ngc9ba5276e321-prebuilt.qemu.org 04/01/2014\nRIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]\nRIP: 0010:rp2_ch_interrupt drivers/tty/serial/rp2.c:472 [inline]\nRIP: 0010:rp2_asic_interrupt.isra.9+0x181/0x990 drivers/tty/serial/rp2.c:\n493\nCo\n---truncated---"
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      "title": "serial: rp2: use \u0027request_firmware\u0027 instead of \u0027request_firmware_nowait\u0027",
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  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1e04d5d5fe5e76af68f834e1941fcbfa439653be\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c697244ce940ec07e2d745ccb63ca97fc0266fbc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/1cc57cb32c84e059bd158494f746b665fc14d1b1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/35265552c7fe9553c75e324c80f45e28ff14eb6e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/915452f40e2f495e187276c4407a4f567ec2307e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6a931ceb0b9401fe18d0c500e08164bf9cc7be4b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/9b07b6973f7359e2dd6a9fe6db0c142634c823b7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/016002848c82eeb5d460489ce392d91fe18c475c\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:24:40.135Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47169\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-25T15:14:46.131045Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:19.371Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"serial: rp2: use \u0027request_firmware\u0027 instead of \u0027request_firmware_nowait\u0027\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"1e04d5d5fe5e76af68f834e1941fcbfa439653be\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"c697244ce940ec07e2d745ccb63ca97fc0266fbc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"1cc57cb32c84e059bd158494f746b665fc14d1b1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"35265552c7fe9553c75e324c80f45e28ff14eb6e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"915452f40e2f495e187276c4407a4f567ec2307e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"6a931ceb0b9401fe18d0c500e08164bf9cc7be4b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"9b07b6973f7359e2dd6a9fe6db0c142634c823b7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7d9f49afa451d8565d00a5cea39acf9bb26feb50\", \"lessThan\": \"016002848c82eeb5d460489ce392d91fe18c475c\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/tty/serial/rp2.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.235\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.193\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.124\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.42\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/tty/serial/rp2.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1e04d5d5fe5e76af68f834e1941fcbfa439653be\"}, {\"url\": \"https://git.kernel.org/stable/c/c697244ce940ec07e2d745ccb63ca97fc0266fbc\"}, {\"url\": \"https://git.kernel.org/stable/c/1cc57cb32c84e059bd158494f746b665fc14d1b1\"}, {\"url\": \"https://git.kernel.org/stable/c/35265552c7fe9553c75e324c80f45e28ff14eb6e\"}, {\"url\": \"https://git.kernel.org/stable/c/915452f40e2f495e187276c4407a4f567ec2307e\"}, {\"url\": \"https://git.kernel.org/stable/c/6a931ceb0b9401fe18d0c500e08164bf9cc7be4b\"}, {\"url\": \"https://git.kernel.org/stable/c/9b07b6973f7359e2dd6a9fe6db0c142634c823b7\"}, {\"url\": \"https://git.kernel.org/stable/c/016002848c82eeb5d460489ce392d91fe18c475c\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nserial: rp2: use \u0027request_firmware\u0027 instead of \u0027request_firmware_nowait\u0027\\n\\nIn \u0027rp2_probe\u0027, the driver registers \u0027rp2_uart_interrupt\u0027 then calls\\n\u0027rp2_fw_cb\u0027 through \u0027request_firmware_nowait\u0027. In \u0027rp2_fw_cb\u0027, if the\\nfirmware don\u0027t exists, function just return without initializing ports\\nof \u0027rp2_card\u0027. But now the interrupt handler function has been\\nregistered, and when an interrupt comes, \u0027rp2_uart_interrupt\u0027 may access\\nthose ports then causing NULL pointer dereference or other bugs.\\n\\nBecause the driver does some initialization work in \u0027rp2_fw_cb\u0027, in\\norder to make the driver ready to handle interrupts, \u0027request_firmware\u0027\\nshould be used instead of asynchronous \u0027request_firmware_nowait\u0027.\\n\\nThis report reveals it:\\n\\nINFO: trying to register non-static key.\\nthe code is fine but needs lockdep annotation.\\nturning off the locking correctness validator.\\nCPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.19.177-gdba4159c14ef-dirty #45\\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-\\ngc9ba5276e321-prebuilt.qemu.org 04/01/2014\\nCall Trace:\\n \u003cIRQ\u003e\\n __dump_stack lib/dump_stack.c:77 [inline]\\n dump_stack+0xec/0x156 lib/dump_stack.c:118\\n assign_lock_key kernel/locking/lockdep.c:727 [inline]\\n register_lock_class+0x14e5/0x1ba0 kernel/locking/lockdep.c:753\\n __lock_acquire+0x187/0x3750 kernel/locking/lockdep.c:3303\\n lock_acquire+0x124/0x340 kernel/locking/lockdep.c:3907\\n __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]\\n _raw_spin_lock+0x32/0x50 kernel/locking/spinlock.c:144\\n spin_lock include/linux/spinlock.h:329 [inline]\\n rp2_ch_interrupt drivers/tty/serial/rp2.c:466 [inline]\\n rp2_asic_interrupt.isra.9+0x15d/0x990 drivers/tty/serial/rp2.c:493\\n rp2_uart_interrupt+0x49/0xe0 drivers/tty/serial/rp2.c:504\\n __handle_irq_event_percpu+0xfb/0x770 kernel/irq/handle.c:149\\n handle_irq_event_percpu+0x79/0x150 kernel/irq/handle.c:189\\n handle_irq_event+0xac/0x140 kernel/irq/handle.c:206\\n handle_fasteoi_irq+0x232/0x5c0 kernel/irq/chip.c:725\\n generic_handle_irq_desc include/linux/irqdesc.h:155 [inline]\\n handle_irq+0x230/0x3a0 arch/x86/kernel/irq_64.c:87\\n do_IRQ+0xa7/0x1e0 arch/x86/kernel/irq.c:247\\n common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670\\n \u003c/IRQ\u003e\\nRIP: 0010:native_safe_halt+0x28/0x30 arch/x86/include/asm/irqflags.h:61\\nCode: 00 00 55 be 04 00 00 00 48 c7 c7 00 c2 2f 8c 48 89 e5 e8 fb 31 e7 f8\\n8b 05 75 af 8d 03 85 c0 7e 07 0f 00 2d 8a 61 65 00 fb f4 \u003c5d\u003e c3 90 90 90\\n90 90 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41\\nRSP: 0018:ffff88806b71fcc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffde\\nRAX: 0000000000000000 RBX: ffffffff8bde7e48 RCX: ffffffff88a21285\\nRDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8c2fc200\\nRBP: ffff88806b71fcc8 R08: fffffbfff185f840 R09: fffffbfff185f840\\nR10: 0000000000000001 R11: fffffbfff185f840 R12: 0000000000000002\\nR13: ffffffff8bea18a0 R14: 0000000000000000 R15: 0000000000000000\\n arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]\\n default_idle+0x6f/0x360 arch/x86/kernel/process.c:557\\n arch_cpu_idle+0xf/0x20 arch/x86/kernel/process.c:548\\n default_idle_call+0x3b/0x60 kernel/sched/idle.c:93\\n cpuidle_idle_call kernel/sched/idle.c:153 [inline]\\n do_idle+0x2ab/0x3c0 kernel/sched/idle.c:263\\n cpu_startup_entry+0xcb/0xe0 kernel/sched/idle.c:369\\n start_secondary+0x3b8/0x4e0 arch/x86/kernel/smpboot.c:271\\n secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243\\nBUG: unable to handle kernel NULL pointer dereference at 0000000000000010\\nPGD 8000000056d27067 P4D 8000000056d27067 PUD 56d28067 PMD 0\\nOops: 0000 [#1] PREEMPT SMP KASAN PTI\\nCPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.19.177-gdba4159c14ef-dirty #45\\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-\\ngc9ba5276e321-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]\\nRIP: 0010:rp2_ch_interrupt drivers/tty/serial/rp2.c:472 [inline]\\nRIP: 0010:rp2_asic_interrupt.isra.9+0x181/0x990 drivers/tty/serial/rp2.c:\\n493\\nCo\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.271\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.271\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.235\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.193\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.124\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.42\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.9\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"3.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-18T11:35:45.874Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47169\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-18T11:35:45.874Z\", \"dateReserved\": \"2024-03-25T09:12:14.111Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-25T09:16:21.589Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.