{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.180-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents  pefile_digest_pe_contents() computes the trailing-data hash length as pelen - (hashed_bytes + certs_size). A crafted PE can make the addition exceed pelen, causing the unsigned subtraction to underflow to ~4 GiB. This is passed to crypto_shash_update() which reads out of bounds and panics on unmapped vmalloc guard pages.   BUG: unable to handle page fault for address: ffffc900038d8000  Oops: Oops: 0000 [#1] SMP KASAN NOPTI  RIP: 0010:sha256_blocks_generic (lib/crypto/sha256.c:152)  Call Trace:   \u003cTASK\u003e   __sha256_update (lib/crypto/sha256.c:208)   crypto_sha256_update (crypto/sha256.c:142)   verify_pefile_signature (crypto/asymmetric_keys/verify_pefile.c:436)   kexec_kernel_verify_pe_sig (kernel/kexec_file.c:151)   __do_sys_kexec_file_load (kernel/kexec_file.c:406)   do_syscall_64 (arch/x86/entry/syscall_64.c:94)   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)   \u003c/TASK\u003e  Kernel panic - not syncing: Fatal exception  Validate that the addition does not overflow and the result does not exceed pelen before the subtraction. Return -ELIBBAD on failure.",
  "id": "DEBIAN-CVE-2026-64544",
  "modified": "2026-09-14T16:47:50.384871935Z",
  "published": "2026-07-27T21:17:06.980Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64544"
    }
  ],
  "upstream": [
    "CVE-2026-64544"
  ]
}