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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-64544

crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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: <TASK> __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) </TASK> 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < 89efd998470a93284b7ad5a20d4e0e3c6858ae8eaffected
  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < 7016377699b5b25b7ec3c0bf2ec3f983c7e95f7caffected
  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < b798ada5a5d1cb4cc4cfa72074b1b463eca6c506affected
  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < 627938383761fb4334b41ebe7ef438d6b8b19d60affected
  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < e162bc386e71b5412425a38ee048e8d2185491b9affected
  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < 6acd2fbd00f9c72aebefce63fc2e73e8f3d79061affected
  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < 803591785d33cf13b6f73ce2796e8b9e6d5e6526affected
  • af316fc442ef23901bbfcec5af55e69ca6ce9563 to < f7dd32c5179d7755de18e21d5674b08f9e5cb180affected

Linux Linux

Default version status: affected

  • 3.17affected
  • 0 to < 3.17unaffected
  • 5.10.261 to ≤ 5.10.*unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References