CVE-2026-64544crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 8 days later
· 8 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Awaiting Analysis.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < 89efd998470a93284b7ad5a20d4e0e3c6858ae8e
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < 7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < b798ada5a5d1cb4cc4cfa72074b1b463eca6c506
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < 627938383761fb4334b41ebe7ef438d6b8b19d60
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < e162bc386e71b5412425a38ee048e8d2185491b9
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < 6acd2fbd00f9c72aebefce63fc2e73e8f3d79061
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < 803591785d33cf13b6f73ce2796e8b9e6d5e6526
- affected af316fc442ef23901bbfcec5af55e69ca6ce9563 – < f7dd32c5179d7755de18e21d5674b08f9e5cb180
- affected 3.17
- unaffected < 3.17
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/89efd998470a93284b7ad5a20d4e0e3c6858ae8e (opens in a new tab)
- https://git.kernel.org/stable/c/7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c (opens in a new tab)
- https://git.kernel.org/stable/c/b798ada5a5d1cb4cc4cfa72074b1b463eca6c506 (opens in a new tab)
- https://git.kernel.org/stable/c/627938383761fb4334b41ebe7ef438d6b8b19d60 (opens in a new tab)
- https://git.kernel.org/stable/c/e162bc386e71b5412425a38ee048e8d2185491b9 (opens in a new tab)
- https://git.kernel.org/stable/c/6acd2fbd00f9c72aebefce63fc2e73e8f3d79061 (opens in a new tab)
- https://git.kernel.org/stable/c/803591785d33cf13b6f73ce2796e8b9e6d5e6526 (opens in a new tab)
- https://git.kernel.org/stable/c/f7dd32c5179d7755de18e21d5674b08f9e5cb180 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-49595 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64544)Record last updated .