CVE-2024-35995 (GCVE-0-2024-35995)

Vulnerability from cvelistv5 – Published: 2024-05-20 09:47 – Updated: 2026-01-05 10:36
VLAI?
Title
ACPI: CPPC: Use access_width over bit_width for system memory accesses
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: CPPC: Use access_width over bit_width for system memory accesses To align with ACPI 6.3+, since bit_width can be any 8-bit value, it cannot be depended on to be always on a clean 8b boundary. This was uncovered on the Cobalt 100 platform. SError Interrupt on CPU26, code 0xbe000011 -- SError CPU: 26 PID: 1510 Comm: systemd-udevd Not tainted 5.15.2.1-13 #1 Hardware name: MICROSOFT CORPORATION, BIOS MICROSOFT CORPORATION pstate: 62400009 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : cppc_get_perf_caps+0xec/0x410 lr : cppc_get_perf_caps+0xe8/0x410 sp : ffff8000155ab730 x29: ffff8000155ab730 x28: ffff0080139d0038 x27: ffff0080139d0078 x26: 0000000000000000 x25: ffff0080139d0058 x24: 00000000ffffffff x23: ffff0080139d0298 x22: ffff0080139d0278 x21: 0000000000000000 x20: ffff00802b251910 x19: ffff0080139d0000 x18: ffffffffffffffff x17: 0000000000000000 x16: ffffdc7e111bad04 x15: ffff00802b251008 x14: ffffffffffffffff x13: ffff013f1fd63300 x12: 0000000000000006 x11: ffffdc7e128f4420 x10: 0000000000000000 x9 : ffffdc7e111badec x8 : ffff00802b251980 x7 : 0000000000000000 x6 : ffff0080139d0028 x5 : 0000000000000000 x4 : ffff0080139d0018 x3 : 00000000ffffffff x2 : 0000000000000008 x1 : ffff8000155ab7a0 x0 : 0000000000000000 Kernel panic - not syncing: Asynchronous SError Interrupt CPU: 26 PID: 1510 Comm: systemd-udevd Not tainted 5.15.2.1-13 #1 Hardware name: MICROSOFT CORPORATION, BIOS MICROSOFT CORPORATION Call trace: dump_backtrace+0x0/0x1e0 show_stack+0x24/0x30 dump_stack_lvl+0x8c/0xb8 dump_stack+0x18/0x34 panic+0x16c/0x384 add_taint+0x0/0xc0 arm64_serror_panic+0x7c/0x90 arm64_is_fatal_ras_serror+0x34/0xa4 do_serror+0x50/0x6c el1h_64_error_handler+0x40/0x74 el1h_64_error+0x7c/0x80 cppc_get_perf_caps+0xec/0x410 cppc_cpufreq_cpu_init+0x74/0x400 [cppc_cpufreq] cpufreq_online+0x2dc/0xa30 cpufreq_add_dev+0xc0/0xd4 subsys_interface_register+0x134/0x14c cpufreq_register_driver+0x1b0/0x354 cppc_cpufreq_init+0x1a8/0x1000 [cppc_cpufreq] do_one_initcall+0x50/0x250 do_init_module+0x60/0x27c load_module+0x2300/0x2570 __do_sys_finit_module+0xa8/0x114 __arm64_sys_finit_module+0x2c/0x3c invoke_syscall+0x78/0x100 el0_svc_common.constprop.0+0x180/0x1a0 do_el0_svc+0x84/0xa0 el0_svc+0x2c/0xc0 el0t_64_sync_handler+0xa4/0x12c el0t_64_sync+0x1a4/0x1a8 Instead, use access_width to determine the size and use the offset and width to shift and mask the bits to read/write out. Make sure to add a check for system memory since pcc redefines the access_width to subspace id. If access_width is not set, then fall back to using bit_width. [ rjw: Subject and changelog edits, comment adjustments ]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5bbb86aa4b8d84395e42cd05448820651d79f349 , < 01fc53be672acae37e611c80cc0b4f3939584de3 (git)
Affected: 5bbb86aa4b8d84395e42cd05448820651d79f349 , < 1b890ae474d19800a6be1696df7fb4d9a41676e4 (git)
Affected: 5bbb86aa4b8d84395e42cd05448820651d79f349 , < 6cb6b12b78dcd8867a3fdbb1b6d0ed1df2b208d1 (git)
Affected: 5bbb86aa4b8d84395e42cd05448820651d79f349 , < 2f4a4d63a193be6fd530d180bb13c3592052904c (git)
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    Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 6.1.90 , ≤ 6.1.* (semver)
Unaffected: 6.6.30 , ≤ 6.6.* (semver)
Unaffected: 6.8.9 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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This was\\nuncovered on the Cobalt 100 platform.\\n\\nSError Interrupt on CPU26, code 0xbe000011 -- SError\\n CPU: 26 PID: 1510 Comm: systemd-udevd Not tainted 5.15.2.1-13 #1\\n Hardware name: MICROSOFT CORPORATION, BIOS MICROSOFT CORPORATION\\n pstate: 62400009 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)\\n pc : cppc_get_perf_caps+0xec/0x410\\n lr : cppc_get_perf_caps+0xe8/0x410\\n sp : ffff8000155ab730\\n x29: ffff8000155ab730 x28: ffff0080139d0038 x27: ffff0080139d0078\\n x26: 0000000000000000 x25: ffff0080139d0058 x24: 00000000ffffffff\\n x23: ffff0080139d0298 x22: ffff0080139d0278 x21: 0000000000000000\\n x20: ffff00802b251910 x19: ffff0080139d0000 x18: ffffffffffffffff\\n x17: 0000000000000000 x16: ffffdc7e111bad04 x15: ffff00802b251008\\n x14: ffffffffffffffff x13: ffff013f1fd63300 x12: 0000000000000006\\n x11: ffffdc7e128f4420 x10: 0000000000000000 x9 : ffffdc7e111badec\\n x8 : ffff00802b251980 x7 : 0000000000000000 x6 : ffff0080139d0028\\n x5 : 0000000000000000 x4 : ffff0080139d0018 x3 : 00000000ffffffff\\n x2 : 0000000000000008 x1 : ffff8000155ab7a0 x0 : 0000000000000000\\n Kernel panic - not syncing: Asynchronous SError Interrupt\\n CPU: 26 PID: 1510 Comm: systemd-udevd Not tainted\\n5.15.2.1-13 #1\\n Hardware name: MICROSOFT CORPORATION, BIOS MICROSOFT CORPORATION\\n Call trace:\\n  dump_backtrace+0x0/0x1e0\\n  show_stack+0x24/0x30\\n  dump_stack_lvl+0x8c/0xb8\\n  dump_stack+0x18/0x34\\n  panic+0x16c/0x384\\n  add_taint+0x0/0xc0\\n  arm64_serror_panic+0x7c/0x90\\n  arm64_is_fatal_ras_serror+0x34/0xa4\\n  do_serror+0x50/0x6c\\n  el1h_64_error_handler+0x40/0x74\\n  el1h_64_error+0x7c/0x80\\n  cppc_get_perf_caps+0xec/0x410\\n  cppc_cpufreq_cpu_init+0x74/0x400 [cppc_cpufreq]\\n  cpufreq_online+0x2dc/0xa30\\n  cpufreq_add_dev+0xc0/0xd4\\n  subsys_interface_register+0x134/0x14c\\n  cpufreq_register_driver+0x1b0/0x354\\n  cppc_cpufreq_init+0x1a8/0x1000 [cppc_cpufreq]\\n  do_one_initcall+0x50/0x250\\n  do_init_module+0x60/0x27c\\n  load_module+0x2300/0x2570\\n  __do_sys_finit_module+0xa8/0x114\\n  __arm64_sys_finit_module+0x2c/0x3c\\n  invoke_syscall+0x78/0x100\\n  el0_svc_common.constprop.0+0x180/0x1a0\\n  do_el0_svc+0x84/0xa0\\n  el0_svc+0x2c/0xc0\\n  el0t_64_sync_handler+0xa4/0x12c\\n  el0t_64_sync+0x1a4/0x1a8\\n\\nInstead, use access_width to determine the size and use the offset and\\nwidth to shift and mask the bits to read/write out. Make sure to add a\\ncheck for system memory since pcc redefines the access_width to\\nsubspace id.\\n\\nIf access_width is not set, then fall back to using bit_width.\\n\\n[ rjw: Subject and changelog edits, comment adjustments ]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.90\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.30\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.9\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"4.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:36:08.591Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-35995\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:36:08.591Z\", \"dateReserved\": \"2024-05-17T13:50:33.148Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-20T09:47:59.057Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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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.