CVE-2024-26703 (GCVE-0-2024-26703)

Vulnerability from cvelistv5 – Published: 2024-04-03 14:55 – Updated: 2025-05-04 08:54
VLAI?
Title
tracing/timerlat: Move hrtimer_init to timerlat_fd open()
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing/timerlat: Move hrtimer_init to timerlat_fd open() Currently, the timerlat's hrtimer is initialized at the first read of timerlat_fd, and destroyed at close(). It works, but it causes an error if the user program open() and close() the file without reading. Here's an example: # echo NO_OSNOISE_WORKLOAD > /sys/kernel/debug/tracing/osnoise/options # echo timerlat > /sys/kernel/debug/tracing/current_tracer # cat <<EOF > ./timerlat_load.py # !/usr/bin/env python3 timerlat_fd = open("/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd", 'r') timerlat_fd.close(); EOF # ./taskset -c 0 ./timerlat_load.py <BOOM> BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 PID: 2673 Comm: python3 Not tainted 6.6.13-200.fc39.x86_64 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 RIP: 0010:hrtimer_active+0xd/0x50 Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 <8b> 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d RSP: 0018:ffffb031009b7e10 EFLAGS: 00010286 RAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08 RBP: ffff9118f786db80 R08: ffff9117a0ddd420 R09: ffff9117804d4f70 R10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08 R13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 0000000000000000 FS: 00007f2ffbab1740(0000) GS:ffff9118f7840000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 00000001b402e000 CR4: 0000000000750ee0 PKRU: 55555554 Call Trace: <TASK> ? __die+0x23/0x70 ? page_fault_oops+0x171/0x4e0 ? srso_alias_return_thunk+0x5/0x7f ? avc_has_extended_perms+0x237/0x520 ? exc_page_fault+0x7f/0x180 ? asm_exc_page_fault+0x26/0x30 ? hrtimer_active+0xd/0x50 hrtimer_cancel+0x15/0x40 timerlat_fd_release+0x48/0xe0 __fput+0xf5/0x290 __x64_sys_close+0x3d/0x80 do_syscall_64+0x60/0x90 ? srso_alias_return_thunk+0x5/0x7f ? __x64_sys_ioctl+0x72/0xd0 ? srso_alias_return_thunk+0x5/0x7f ? syscall_exit_to_user_mode+0x2b/0x40 ? srso_alias_return_thunk+0x5/0x7f ? do_syscall_64+0x6c/0x90 ? srso_alias_return_thunk+0x5/0x7f ? exit_to_user_mode_prepare+0x142/0x1f0 ? srso_alias_return_thunk+0x5/0x7f ? syscall_exit_to_user_mode+0x2b/0x40 ? srso_alias_return_thunk+0x5/0x7f ? do_syscall_64+0x6c/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f2ffb321594 Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d RSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0000000000000000 R10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003 R13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 00007f2ffba4e668 </TASK> CR2: 0000000000000010 ---[ end trace 0000000000000000 ]--- Move hrtimer_init to timerlat_fd open() to avoid this problem.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e88ed227f639ebcb31ed4e5b88756b47d904584b , < 5f703935fdb559642d85b2088442ee55a557ae6d (git)
Affected: e88ed227f639ebcb31ed4e5b88756b47d904584b , < 2354d29986ebd138f89c2b73fecf8237e0a4ad6b (git)
Affected: e88ed227f639ebcb31ed4e5b88756b47d904584b , < 1389358bb008e7625942846e9f03554319b7fecc (git)
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    Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.6.18 , ≤ 6.6.* (semver)
Unaffected: 6.7.6 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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    "vulnrichment": {
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It works, but it causes an error\\nif the user program open() and close() the file without reading.\\n\\nHere\u0027s an example:\\n\\n # echo NO_OSNOISE_WORKLOAD \u003e /sys/kernel/debug/tracing/osnoise/options\\n # echo timerlat \u003e /sys/kernel/debug/tracing/current_tracer\\n\\n # cat \u003c\u003cEOF \u003e ./timerlat_load.py\\n # !/usr/bin/env python3\\n\\n timerlat_fd = open(\\\"/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd\\\", \u0027r\u0027)\\n timerlat_fd.close();\\n EOF\\n\\n # ./taskset -c 0 ./timerlat_load.py\\n\u003cBOOM\u003e\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000010\\n #PF: supervisor read access in kernel mode\\n #PF: error_code(0x0000) - not-present page\\n PGD 0 P4D 0\\n Oops: 0000 [#1] PREEMPT SMP NOPTI\\n CPU: 1 PID: 2673 Comm: python3 Not tainted 6.6.13-200.fc39.x86_64 #1\\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\\n RIP: 0010:hrtimer_active+0xd/0x50\\n Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 57 30 \u003c8b\u003e 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f 38 00 75 1d\\n RSP: 0018:ffffb031009b7e10 EFLAGS: 00010286\\n RAX: 000000000002db00 RBX: ffff9118f786db08 RCX: 0000000000000000\\n RDX: 0000000000000000 RSI: ffff9117a0e64400 RDI: ffff9118f786db08\\n RBP: ffff9118f786db80 R08: ffff9117a0ddd420 R09: ffff9117804d4f70\\n R10: 0000000000000000 R11: 0000000000000000 R12: ffff9118f786db08\\n R13: ffff91178fdd5e20 R14: ffff9117840978c0 R15: 0000000000000000\\n FS:  00007f2ffbab1740(0000) GS:ffff9118f7840000(0000) knlGS:0000000000000000\\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 0000000000000010 CR3: 00000001b402e000 CR4: 0000000000750ee0\\n PKRU: 55555554\\n Call Trace:\\n  \u003cTASK\u003e\\n  ? __die+0x23/0x70\\n  ? page_fault_oops+0x171/0x4e0\\n  ? srso_alias_return_thunk+0x5/0x7f\\n  ? avc_has_extended_perms+0x237/0x520\\n  ? exc_page_fault+0x7f/0x180\\n  ? asm_exc_page_fault+0x26/0x30\\n  ? hrtimer_active+0xd/0x50\\n  hrtimer_cancel+0x15/0x40\\n  timerlat_fd_release+0x48/0xe0\\n  __fput+0xf5/0x290\\n  __x64_sys_close+0x3d/0x80\\n  do_syscall_64+0x60/0x90\\n  ? srso_alias_return_thunk+0x5/0x7f\\n  ? __x64_sys_ioctl+0x72/0xd0\\n  ? srso_alias_return_thunk+0x5/0x7f\\n  ? syscall_exit_to_user_mode+0x2b/0x40\\n  ? srso_alias_return_thunk+0x5/0x7f\\n  ? do_syscall_64+0x6c/0x90\\n  ? srso_alias_return_thunk+0x5/0x7f\\n  ? exit_to_user_mode_prepare+0x142/0x1f0\\n  ? srso_alias_return_thunk+0x5/0x7f\\n  ? syscall_exit_to_user_mode+0x2b/0x40\\n  ? srso_alias_return_thunk+0x5/0x7f\\n  ? do_syscall_64+0x6c/0x90\\n  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\\n RIP: 0033:0x7f2ffb321594\\n Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 cd 0d 00 00 74 13 b8 03 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d\\n RSP: 002b:00007ffe8d8eef18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003\\n RAX: ffffffffffffffda RBX: 00007f2ffba4e668 RCX: 00007f2ffb321594\\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\\n RBP: 00007ffe8d8eef40 R08: 0000000000000000 R09: 0000000000000000\\n R10: 55c926e3167eae79 R11: 0000000000000202 R12: 0000000000000003\\n R13: 00007ffe8d8ef030 R14: 0000000000000000 R15: 00007f2ffba4e668\\n  \u003c/TASK\u003e\\n CR2: 0000000000000010\\n ---[ end trace 0000000000000000 ]---\\n\\nMove hrtimer_init to timerlat_fd open() to avoid this problem.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.18\", \"versionStartIncluding\": \"6.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.6\", \"versionStartIncluding\": \"6.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"6.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:54:25.951Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26703\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:54:25.951Z\", \"dateReserved\": \"2024-02-19T14:20:24.158Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-03T14:55:01.838Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • 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.