FKIE_CVE-2026-43277

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-08 19:34
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: APEI/GHES: ensure that won't go past CPER allocated record The logic at ghes_new() prevents allocating too large records, by checking if they're bigger than GHES_ESTATUS_MAX_SIZE (currently, 64KB). Yet, the allocation is done with the actual number of pages from the CPER bios table location, which can be smaller. Yet, a bad firmware could send data with a different size, which might be bigger than the allocated memory, causing an OOPS: Unable to handle kernel paging request at virtual address fff00000f9b40000 Mem abort info: ESR = 0x0000000096000007 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000007, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 swapper pgtable: 4k pages, 52-bit VAs, pgdp=000000008ba16000 [fff00000f9b40000] pgd=180000013ffff403, p4d=180000013fffe403, pud=180000013f85b403, pmd=180000013f68d403, pte=0000000000000000 Internal error: Oops: 0000000096000007 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 303 Comm: kworker/0:1 Not tainted 6.19.0-rc1-00002-gda407d200220 #34 PREEMPT Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 02/02/2022 Workqueue: kacpi_notify acpi_os_execute_deferred pstate: 214020c5 (nzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : hex_dump_to_buffer+0x30c/0x4a0 lr : hex_dump_to_buffer+0x328/0x4a0 sp : ffff800080e13880 x29: ffff800080e13880 x28: ffffac9aba86f6a8 x27: 0000000000000083 x26: fff00000f9b3fffc x25: 0000000000000004 x24: 0000000000000004 x23: ffff800080e13905 x22: 0000000000000010 x21: 0000000000000083 x20: 0000000000000001 x19: 0000000000000008 x18: 0000000000000010 x17: 0000000000000001 x16: 00000007c7f20fec x15: 0000000000000020 x14: 0000000000000008 x13: 0000000000081020 x12: 0000000000000008 x11: ffff800080e13905 x10: ffff800080e13988 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000020 x5 : 0000000000000030 x4 : 00000000fffffffe x3 : 0000000000000000 x2 : ffffac9aba78c1c8 x1 : ffffac9aba76d0a8 x0 : 0000000000000008 Call trace: hex_dump_to_buffer+0x30c/0x4a0 (P) print_hex_dump+0xac/0x170 cper_estatus_print_section+0x90c/0x968 cper_estatus_print+0xf0/0x158 __ghes_print_estatus+0xa0/0x148 ghes_proc+0x1bc/0x220 ghes_notify_hed+0x5c/0xb8 notifier_call_chain+0x78/0x148 blocking_notifier_call_chain+0x4c/0x80 acpi_hed_notify+0x28/0x40 acpi_ev_notify_dispatch+0x50/0x80 acpi_os_execute_deferred+0x24/0x48 process_one_work+0x15c/0x3b0 worker_thread+0x2d0/0x400 kthread+0x148/0x228 ret_from_fork+0x10/0x20 Code: 6b14033f 540001ad a94707e2 f100029f (b8747b44) ---[ end trace 0000000000000000 ]--- Prevent that by taking the actual allocated are into account when checking for CPER length. [ rjw: Subject tweaks ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/616c120dcdf1ce96edcd818e38bce49667f80689Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6f5d41984ad896736c23e2fff7c80e15c1319132Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92ba79074c58e65a6e32713758c5a9aecd33c2eaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98bd9b28d4d11e6739ad86524b4be4ada9025e60Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b6be51a12441136fdf8c49b2525689fbea1856e1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0ec99115e135dbb58e11a0df007c7d4771d4a17Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f3740a1562445f36f08afab8af59e37117b3acdcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fa2408a24f8f0db14d9cfc613ef162dc267d7ad4Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D6E3A666-FDAF-4C4C-AFEE-803E15871F9A",
              "versionEndExcluding": "5.10.252",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nAPEI/GHES: ensure that won\u0027t go past CPER allocated record\n\nThe logic at ghes_new() prevents allocating too large records, by\nchecking if they\u0027re bigger than GHES_ESTATUS_MAX_SIZE (currently, 64KB).\nYet, the allocation is done with the actual number of pages from the\nCPER bios table location, which can be smaller.\n\nYet, a bad firmware could send data with a different size, which might\nbe bigger than the allocated memory, causing an OOPS:\n\n    Unable to handle kernel paging request at virtual address fff00000f9b40000\n    Mem abort info:\n      ESR = 0x0000000096000007\n      EC = 0x25: DABT (current EL), IL = 32 bits\n      SET = 0, FnV = 0\n      EA = 0, S1PTW = 0\n      FSC = 0x07: level 3 translation fault\n    Data abort info:\n      ISV = 0, ISS = 0x00000007, ISS2 = 0x00000000\n      CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n      GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n    swapper pgtable: 4k pages, 52-bit VAs, pgdp=000000008ba16000\n    [fff00000f9b40000] pgd=180000013ffff403, p4d=180000013fffe403, pud=180000013f85b403, pmd=180000013f68d403, pte=0000000000000000\n    Internal error: Oops: 0000000096000007 [#1]  SMP\n    Modules linked in:\n    CPU: 0 UID: 0 PID: 303 Comm: kworker/0:1 Not tainted 6.19.0-rc1-00002-gda407d200220 #34 PREEMPT\n    Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 02/02/2022\n    Workqueue: kacpi_notify acpi_os_execute_deferred\n    pstate: 214020c5 (nzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n    pc : hex_dump_to_buffer+0x30c/0x4a0\n    lr : hex_dump_to_buffer+0x328/0x4a0\n    sp : ffff800080e13880\n    x29: ffff800080e13880 x28: ffffac9aba86f6a8 x27: 0000000000000083\n    x26: fff00000f9b3fffc x25: 0000000000000004 x24: 0000000000000004\n    x23: ffff800080e13905 x22: 0000000000000010 x21: 0000000000000083\n    x20: 0000000000000001 x19: 0000000000000008 x18: 0000000000000010\n    x17: 0000000000000001 x16: 00000007c7f20fec x15: 0000000000000020\n    x14: 0000000000000008 x13: 0000000000081020 x12: 0000000000000008\n    x11: ffff800080e13905 x10: ffff800080e13988 x9 : 0000000000000000\n    x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000020\n    x5 : 0000000000000030 x4 : 00000000fffffffe x3 : 0000000000000000\n    x2 : ffffac9aba78c1c8 x1 : ffffac9aba76d0a8 x0 : 0000000000000008\n    Call trace:\n     hex_dump_to_buffer+0x30c/0x4a0 (P)\n     print_hex_dump+0xac/0x170\n     cper_estatus_print_section+0x90c/0x968\n     cper_estatus_print+0xf0/0x158\n     __ghes_print_estatus+0xa0/0x148\n     ghes_proc+0x1bc/0x220\n     ghes_notify_hed+0x5c/0xb8\n     notifier_call_chain+0x78/0x148\n     blocking_notifier_call_chain+0x4c/0x80\n     acpi_hed_notify+0x28/0x40\n     acpi_ev_notify_dispatch+0x50/0x80\n     acpi_os_execute_deferred+0x24/0x48\n     process_one_work+0x15c/0x3b0\n     worker_thread+0x2d0/0x400\n     kthread+0x148/0x228\n     ret_from_fork+0x10/0x20\n    Code: 6b14033f 540001ad a94707e2 f100029f (b8747b44)\n    ---[ end trace 0000000000000000 ]---\n\nPrevent that by taking the actual allocated are into account when\nchecking for CPER length.\n\n[ rjw: Subject tweaks ]"
    }
  ],
  "id": "CVE-2026-43277",
  "lastModified": "2026-05-08T19:34:27.130",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-05-06T12:16:49.057",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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