Answer in brief
CVE-2026-64544 records a Unknown severity vulnerability in crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-64544 records a Unknown severity vulnerability in crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <89efd998470a93284b7ad5a20d4e0e3c6858ae8e || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <b798ada5a5d1cb4cc4cfa72074b1b463eca6c506 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <627938383761fb4334b41ebe7ef438d6b8b19d60 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <e162bc386e71b5412425a38ee048e8d2185491b9 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <6acd2fbd00f9c72aebefce63fc2e73e8f3d79061 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <803591785d33cf13b6f73ce2796e8b9e6d5e6526 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <f7dd32c5179d7755de18e21d5674b08f9e5cb180 | 89efd998470a93284b7ad5a20d4e0e3c6858ae8e, 7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c, b798ada5a5d1cb4cc4cfa72074b1b463eca6c506, 627938383761fb4334b41ebe7ef438d6b8b19d60, e162bc386e71b5412425a38ee048e8d2185491b9, 6acd2fbd00f9c72aebefce63fc2e73e8f3d79061, 803591785d33cf13b6f73ce2796e8b9e6d5e6526, f7dd32c5179d7755de18e21d5674b08f9e5cb180 |
| Linux/Linuxgeneric | 3.17 | Not reported |
Published upstream
Jul 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <89efd998470a93284b7ad5a20d4e0e3c6858ae8e || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <b798ada5a5d1cb4cc4cfa72074b1b463eca6c506 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <627938383761fb4334b41ebe7ef438d6b8b19d60 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <e162bc386e71b5412425a38ee048e8d2185491b9 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <6acd2fbd00f9c72aebefce63fc2e73e8f3d79061 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <803591785d33cf13b6f73ce2796e8b9e6d5e6526 || >=af316fc442ef23901bbfcec5af55e69ca6ce9563 <f7dd32c5179d7755de18e21d5674b08f9e5cb180 | 89efd998470a93284b7ad5a20d4e0e3c6858ae8e, 7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c, b798ada5a5d1cb4cc4cfa72074b1b463eca6c506, 627938383761fb4334b41ebe7ef438d6b8b19d60, e162bc386e71b5412425a38ee048e8d2185491b9, 6acd2fbd00f9c72aebefce63fc2e73e8f3d79061, 803591785d33cf13b6f73ce2796e8b9e6d5e6526, f7dd32c5179d7755de18e21d5674b08f9e5cb180 |
| Linux/Linuxgeneric | 3.17 | Not reported |
Published upstream
Jul 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.