crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents
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: __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) 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.
CVE-2026-64544
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:CVE-2026-64544
Kernel
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.10.261
Source reference:
/affected/1/ranges5.15.212Source reference:
/affected/1/ranges6.1.178Source reference:
/affected/1/ranges6.6.145Source reference:
/affected/1/ranges6.12.97Source reference:
/affected/1/ranges6.18.40Source reference:
/affected/1/ranges7.1.5Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "af316fc442ef23901bbfcec5af55e69ca6ce9563"
},
{
"fixed": "89efd998470a93284b7ad5a20d4e0e3c6858ae8e"
},
{
"fixed": "7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c"
},
{
"fixed": "b798ada5a5d1cb4cc4cfa72074b1b463eca6c506"
},
{
"fixed": "627938383761fb4334b41ebe7ef438d6b8b19d60"
},
{
"fixed": "e162bc386e71b5412425a38ee048e8d2185491b9"
},
{
"fixed": "6acd2fbd00f9c72aebefce63fc2e73e8f3d79061"
},
{
"fixed": "803591785d33cf13b6f73ce2796e8b9e6d5e6526"
},
{
"fixed": "f7dd32c5179d7755de18e21d5674b08f9e5cb180"
}
]
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64544.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.17.0"
},
{
"fixed": "5.10.261"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.212"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
},
{
"fixed": "6.1.178"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.6.145"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.97"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.40"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.1.5"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64544.json"
}
}
]- Related CVEs
- CVE-2026-64544
Source reference:
/id
Publisher severity
No explicit severity was provided.
- Event
- #50699 · Revision 1
- Added to Heist Feed
- Publisher date