CVE-2024-49935 (GCVE-0-2024-49935)

Vulnerability from cvelistv5 – Published: 2024-10-21 18:01 – Updated: 2026-01-05 10:54
VLAI?
Title
ACPI: PAD: fix crash in exit_round_robin()
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: PAD: fix crash in exit_round_robin() The kernel occasionally crashes in cpumask_clear_cpu(), which is called within exit_round_robin(), because when executing clear_bit(nr, addr) with nr set to 0xffffffff, the address calculation may cause misalignment within the memory, leading to access to an invalid memory address. ---------- BUG: unable to handle kernel paging request at ffffffffe0740618 ... CPU: 3 PID: 2919323 Comm: acpi_pad/14 Kdump: loaded Tainted: G OE X --------- - - 4.18.0-425.19.2.el8_7.x86_64 #1 ... RIP: 0010:power_saving_thread+0x313/0x411 [acpi_pad] Code: 89 cd 48 89 d3 eb d1 48 c7 c7 55 70 72 c0 e8 64 86 b0 e4 c6 05 0d a1 02 00 01 e9 bc fd ff ff 45 89 e4 42 8b 04 a5 20 82 72 c0 <f0> 48 0f b3 05 f4 9c 01 00 42 c7 04 a5 20 82 72 c0 ff ff ff ff 31 RSP: 0018:ff72a5d51fa77ec8 EFLAGS: 00010202 RAX: 00000000ffffffff RBX: ff462981e5d8cb80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246 RBP: ff46297556959d80 R08: 0000000000000382 R09: ff46297c8d0f38d8 R10: 0000000000000000 R11: 0000000000000001 R12: 000000000000000e R13: 0000000000000000 R14: ffffffffffffffff R15: 000000000000000e FS: 0000000000000000(0000) GS:ff46297a800c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffe0740618 CR3: 0000007e20410004 CR4: 0000000000771ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: ? acpi_pad_add+0x120/0x120 [acpi_pad] kthread+0x10b/0x130 ? set_kthread_struct+0x50/0x50 ret_from_fork+0x1f/0x40 ... CR2: ffffffffe0740618 crash> dis -lr ffffffffc0726923 ... /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 114 0xffffffffc0726918 <power_saving_thread+776>: mov %r12d,%r12d /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 325 0xffffffffc072691b <power_saving_thread+779>: mov -0x3f8d7de0(,%r12,4),%eax /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./arch/x86/include/asm/bitops.h: 80 0xffffffffc0726923 <power_saving_thread+787>: lock btr %rax,0x19cf4(%rip) # 0xffffffffc0740620 <pad_busy_cpus_bits> crash> px tsk_in_cpu[14] $66 = 0xffffffff crash> px 0xffffffffc072692c+0x19cf4 $99 = 0xffffffffc0740620 crash> sym 0xffffffffc0740620 ffffffffc0740620 (b) pad_busy_cpus_bits [acpi_pad] crash> px pad_busy_cpus_bits[0] $42 = 0xfffc0 ---------- To fix this, ensure that tsk_in_cpu[tsk_index] != -1 before calling cpumask_clear_cpu() in exit_round_robin(), just as it is done in round_robin_cpu(). [ rjw: Subject edit, avoid updates to the same value ]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < 82191a21a0dedc8c64e14f07f5d568d09bc4b331 (git)
Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < d214ffa6eb39c08d18a460124dd7ba318dc56f33 (git)
Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < 92e5661b7d0727ab912b76625a88b33fdb9b609a (git)
Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < 68a599da16ebad442ce295d8d2d5c488e3992822 (git)
Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < 68a8e45743d6a120f863fb14b72dc59616597019 (git)
Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < 03593dbb0b272ef7b0358b099841e65735422aca (git)
Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < 27c045f868f0e5052c6b532868a65e0cd250c8fc (git)
Affected: 8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d , < 0a2ed70a549e61c5181bad5db418d223b68ae932 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.55 , ≤ 6.6.* (semver)
Unaffected: 6.10.14 , ≤ 6.10.* (semver)
Unaffected: 6.11.3 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PAD: fix crash in exit_round_robin()\n\nThe kernel occasionally crashes in cpumask_clear_cpu(), which is called\nwithin exit_round_robin(), because when executing clear_bit(nr, addr) with\nnr set to 0xffffffff, the address calculation may cause misalignment within\nthe memory, leading to access to an invalid memory address.\n\n----------\nBUG: unable to handle kernel paging request at ffffffffe0740618\n        ...\nCPU: 3 PID: 2919323 Comm: acpi_pad/14 Kdump: loaded Tainted: G           OE  X --------- -  - 4.18.0-425.19.2.el8_7.x86_64 #1\n        ...\nRIP: 0010:power_saving_thread+0x313/0x411 [acpi_pad]\nCode: 89 cd 48 89 d3 eb d1 48 c7 c7 55 70 72 c0 e8 64 86 b0 e4 c6 05 0d a1 02 00 01 e9 bc fd ff ff 45 89 e4 42 8b 04 a5 20 82 72 c0 \u003cf0\u003e 48 0f b3 05 f4 9c 01 00 42 c7 04 a5 20 82 72 c0 ff ff ff ff 31\nRSP: 0018:ff72a5d51fa77ec8 EFLAGS: 00010202\nRAX: 00000000ffffffff RBX: ff462981e5d8cb80 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246\nRBP: ff46297556959d80 R08: 0000000000000382 R09: ff46297c8d0f38d8\nR10: 0000000000000000 R11: 0000000000000001 R12: 000000000000000e\nR13: 0000000000000000 R14: ffffffffffffffff R15: 000000000000000e\nFS:  0000000000000000(0000) GS:ff46297a800c0000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffe0740618 CR3: 0000007e20410004 CR4: 0000000000771ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n ? acpi_pad_add+0x120/0x120 [acpi_pad]\n kthread+0x10b/0x130\n ? set_kthread_struct+0x50/0x50\n ret_from_fork+0x1f/0x40\n        ...\nCR2: ffffffffe0740618\n\ncrash\u003e dis -lr ffffffffc0726923\n        ...\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 114\n0xffffffffc0726918 \u003cpower_saving_thread+776\u003e:\tmov    %r12d,%r12d\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 325\n0xffffffffc072691b \u003cpower_saving_thread+779\u003e:\tmov    -0x3f8d7de0(,%r12,4),%eax\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./arch/x86/include/asm/bitops.h: 80\n0xffffffffc0726923 \u003cpower_saving_thread+787\u003e:\tlock btr %rax,0x19cf4(%rip)        # 0xffffffffc0740620 \u003cpad_busy_cpus_bits\u003e\n\ncrash\u003e px tsk_in_cpu[14]\n$66 = 0xffffffff\n\ncrash\u003e px 0xffffffffc072692c+0x19cf4\n$99 = 0xffffffffc0740620\n\ncrash\u003e sym 0xffffffffc0740620\nffffffffc0740620 (b) pad_busy_cpus_bits [acpi_pad]\n\ncrash\u003e px pad_busy_cpus_bits[0]\n$42 = 0xfffc0\n----------\n\nTo fix this, ensure that tsk_in_cpu[tsk_index] != -1 before calling\ncpumask_clear_cpu() in exit_round_robin(), just as it is done in\nround_robin_cpu().\n\n[ rjw: Subject edit, avoid updates to the same value ]"
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        "dateUpdated": "2026-01-05T10:54:29.176Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/82191a21a0dedc8c64e14f07f5d568d09bc4b331"
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        {
          "url": "https://git.kernel.org/stable/c/d214ffa6eb39c08d18a460124dd7ba318dc56f33"
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      "title": "ACPI: PAD: fix crash in exit_round_robin()",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-49935",
    "datePublished": "2024-10-21T18:01:56.404Z",
    "dateReserved": "2024-10-21T12:17:06.042Z",
    "dateUpdated": "2026-01-05T10:54:29.176Z",
    "state": "PUBLISHED"
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{\"status\": \"affected\", \"version\": \"8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d\", \"lessThan\": \"03593dbb0b272ef7b0358b099841e65735422aca\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d\", \"lessThan\": \"27c045f868f0e5052c6b532868a65e0cd250c8fc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8e0af5141ab950b78b3ebbfaded5439dcf8b3a8d\", \"lessThan\": \"0a2ed70a549e61c5181bad5db418d223b68ae932\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/acpi/acpi_pad.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.32\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.32\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.296\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.240\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.168\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.113\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.55\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.14\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/acpi/acpi_pad.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/82191a21a0dedc8c64e14f07f5d568d09bc4b331\"}, {\"url\": \"https://git.kernel.org/stable/c/d214ffa6eb39c08d18a460124dd7ba318dc56f33\"}, {\"url\": \"https://git.kernel.org/stable/c/92e5661b7d0727ab912b76625a88b33fdb9b609a\"}, {\"url\": \"https://git.kernel.org/stable/c/68a599da16ebad442ce295d8d2d5c488e3992822\"}, {\"url\": \"https://git.kernel.org/stable/c/68a8e45743d6a120f863fb14b72dc59616597019\"}, {\"url\": \"https://git.kernel.org/stable/c/03593dbb0b272ef7b0358b099841e65735422aca\"}, {\"url\": \"https://git.kernel.org/stable/c/27c045f868f0e5052c6b532868a65e0cd250c8fc\"}, {\"url\": \"https://git.kernel.org/stable/c/0a2ed70a549e61c5181bad5db418d223b68ae932\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nACPI: PAD: fix crash in exit_round_robin()\\n\\nThe kernel occasionally crashes in cpumask_clear_cpu(), which is called\\nwithin exit_round_robin(), because when executing clear_bit(nr, addr) with\\nnr set to 0xffffffff, the address calculation may cause misalignment within\\nthe memory, leading to access to an invalid memory address.\\n\\n----------\\nBUG: unable to handle kernel paging request at ffffffffe0740618\\n        ...\\nCPU: 3 PID: 2919323 Comm: acpi_pad/14 Kdump: loaded Tainted: G           OE  X --------- -  - 4.18.0-425.19.2.el8_7.x86_64 #1\\n        ...\\nRIP: 0010:power_saving_thread+0x313/0x411 [acpi_pad]\\nCode: 89 cd 48 89 d3 eb d1 48 c7 c7 55 70 72 c0 e8 64 86 b0 e4 c6 05 0d a1 02 00 01 e9 bc fd ff ff 45 89 e4 42 8b 04 a5 20 82 72 c0 \u003cf0\u003e 48 0f b3 05 f4 9c 01 00 42 c7 04 a5 20 82 72 c0 ff ff ff ff 31\\nRSP: 0018:ff72a5d51fa77ec8 EFLAGS: 00010202\\nRAX: 00000000ffffffff RBX: ff462981e5d8cb80 RCX: 0000000000000000\\nRDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246\\nRBP: ff46297556959d80 R08: 0000000000000382 R09: ff46297c8d0f38d8\\nR10: 0000000000000000 R11: 0000000000000001 R12: 000000000000000e\\nR13: 0000000000000000 R14: ffffffffffffffff R15: 000000000000000e\\nFS:  0000000000000000(0000) GS:ff46297a800c0000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: ffffffffe0740618 CR3: 0000007e20410004 CR4: 0000000000771ee0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nPKRU: 55555554\\nCall Trace:\\n ? acpi_pad_add+0x120/0x120 [acpi_pad]\\n kthread+0x10b/0x130\\n ? set_kthread_struct+0x50/0x50\\n ret_from_fork+0x1f/0x40\\n        ...\\nCR2: ffffffffe0740618\\n\\ncrash\u003e dis -lr ffffffffc0726923\\n        ...\\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 114\\n0xffffffffc0726918 \u003cpower_saving_thread+776\u003e:\\tmov    %r12d,%r12d\\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 325\\n0xffffffffc072691b \u003cpower_saving_thread+779\u003e:\\tmov    -0x3f8d7de0(,%r12,4),%eax\\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./arch/x86/include/asm/bitops.h: 80\\n0xffffffffc0726923 \u003cpower_saving_thread+787\u003e:\\tlock btr %rax,0x19cf4(%rip)        # 0xffffffffc0740620 \u003cpad_busy_cpus_bits\u003e\\n\\ncrash\u003e px tsk_in_cpu[14]\\n$66 = 0xffffffff\\n\\ncrash\u003e px 0xffffffffc072692c+0x19cf4\\n$99 = 0xffffffffc0740620\\n\\ncrash\u003e sym 0xffffffffc0740620\\nffffffffc0740620 (b) pad_busy_cpus_bits [acpi_pad]\\n\\ncrash\u003e px pad_busy_cpus_bits[0]\\n$42 = 0xfffc0\\n----------\\n\\nTo fix this, ensure that tsk_in_cpu[tsk_index] != -1 before calling\\ncpumask_clear_cpu() in exit_round_robin(), just as it is done in\\nround_robin_cpu().\\n\\n[ rjw: Subject edit, avoid updates to the same value ]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.296\", \"versionStartIncluding\": \"2.6.32\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.240\", \"versionStartIncluding\": \"2.6.32\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.168\", \"versionStartIncluding\": \"2.6.32\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.113\", \"versionStartIncluding\": \"2.6.32\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.55\", \"versionStartIncluding\": \"2.6.32\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.14\", \"versionStartIncluding\": \"2.6.32\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.3\", \"versionStartIncluding\": \"2.6.32\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"2.6.32\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:54:29.176Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-49935\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:54:29.176Z\", \"dateReserved\": \"2024-10-21T12:17:06.042Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T18:01:56.404Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.