{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.170-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.85-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.19.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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 ]",
  "id": "DEBIAN-CVE-2026-43277",
  "modified": "2026-09-14T16:47:47.195635953Z",
  "published": "2026-05-06T12:16:49.057Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-43277"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-43277"
  ]
}