{"api_version":"1","generated_at":"2026-08-01T19:54:52+00:00","cve":"CVE-2026-64544","urls":{"html":"https://cve.report/CVE-2026-64544","api":"https://cve.report/api/cve/CVE-2026-64544.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64544","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64544"},"summary":{"title":"crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents\n\npefile_digest_pe_contents() computes the trailing-data hash length as\npelen - (hashed_bytes + certs_size). A crafted PE can make the addition\nexceed pelen, causing the unsigned subtraction to underflow to ~4 GiB.\nThis is passed to crypto_shash_update() which reads out of bounds and\npanics on unmapped vmalloc guard pages.\n\n BUG: unable to handle page fault for address: ffffc900038d8000\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n RIP: 0010:sha256_blocks_generic (lib/crypto/sha256.c:152)\n Call Trace:\n  <TASK>\n  __sha256_update (lib/crypto/sha256.c:208)\n  crypto_sha256_update (crypto/sha256.c:142)\n  verify_pefile_signature (crypto/asymmetric_keys/verify_pefile.c:436)\n  kexec_kernel_verify_pe_sig (kernel/kexec_file.c:151)\n  __do_sys_kexec_file_load (kernel/kexec_file.c:406)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n  </TASK>\n Kernel panic - not syncing: Fatal exception\n\nValidate that the addition does not overflow and the result does not\nexceed pelen before the subtraction. Return -ELIBBAD on failure.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-27 21:17:06","updated_at":"2026-07-27 21:17:06"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c","name":"https://git.kernel.org/stable/c/7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e162bc386e71b5412425a38ee048e8d2185491b9","name":"https://git.kernel.org/stable/c/e162bc386e71b5412425a38ee048e8d2185491b9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/803591785d33cf13b6f73ce2796e8b9e6d5e6526","name":"https://git.kernel.org/stable/c/803591785d33cf13b6f73ce2796e8b9e6d5e6526","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/89efd998470a93284b7ad5a20d4e0e3c6858ae8e","name":"https://git.kernel.org/stable/c/89efd998470a93284b7ad5a20d4e0e3c6858ae8e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6acd2fbd00f9c72aebefce63fc2e73e8f3d79061","name":"https://git.kernel.org/stable/c/6acd2fbd00f9c72aebefce63fc2e73e8f3d79061","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b798ada5a5d1cb4cc4cfa72074b1b463eca6c506","name":"https://git.kernel.org/stable/c/b798ada5a5d1cb4cc4cfa72074b1b463eca6c506","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f7dd32c5179d7755de18e21d5674b08f9e5cb180","name":"https://git.kernel.org/stable/c/f7dd32c5179d7755de18e21d5674b08f9e5cb180","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/627938383761fb4334b41ebe7ef438d6b8b19d60","name":"https://git.kernel.org/stable/c/627938383761fb4334b41ebe7ef438d6b8b19d60","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64544","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64544","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 89efd998470a93284b7ad5a20d4e0e3c6858ae8e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 b798ada5a5d1cb4cc4cfa72074b1b463eca6c506 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 627938383761fb4334b41ebe7ef438d6b8b19d60 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 e162bc386e71b5412425a38ee048e8d2185491b9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 6acd2fbd00f9c72aebefce63fc2e73e8f3d79061 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 803591785d33cf13b6f73ce2796e8b9e6d5e6526 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected af316fc442ef23901bbfcec5af55e69ca6ce9563 f7dd32c5179d7755de18e21d5674b08f9e5cb180 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64544","cve":"CVE-2026-64544","epss":"0.001760000","percentile":"0.074350000","score_date":"2026-07-29","updated_at":"2026-07-30 00:09:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["crypto/asymmetric_keys/verify_pefile.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"89efd998470a93284b7ad5a20d4e0e3c6858ae8e","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"},{"lessThan":"7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"},{"lessThan":"b798ada5a5d1cb4cc4cfa72074b1b463eca6c506","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"},{"lessThan":"627938383761fb4334b41ebe7ef438d6b8b19d60","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"},{"lessThan":"e162bc386e71b5412425a38ee048e8d2185491b9","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"},{"lessThan":"6acd2fbd00f9c72aebefce63fc2e73e8f3d79061","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"},{"lessThan":"803591785d33cf13b6f73ce2796e8b9e6d5e6526","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"},{"lessThan":"f7dd32c5179d7755de18e21d5674b08f9e5cb180","status":"affected","version":"af316fc442ef23901bbfcec5af55e69ca6ce9563","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["crypto/asymmetric_keys/verify_pefile.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.17"},{"lessThan":"3.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"3.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"3.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents\n\npefile_digest_pe_contents() computes the trailing-data hash length as\npelen - (hashed_bytes + certs_size). A crafted PE can make the addition\nexceed pelen, causing the unsigned subtraction to underflow to ~4 GiB.\nThis is passed to crypto_shash_update() which reads out of bounds and\npanics on unmapped vmalloc guard pages.\n\n BUG: unable to handle page fault for address: ffffc900038d8000\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n RIP: 0010:sha256_blocks_generic (lib/crypto/sha256.c:152)\n Call Trace:\n  <TASK>\n  __sha256_update (lib/crypto/sha256.c:208)\n  crypto_sha256_update (crypto/sha256.c:142)\n  verify_pefile_signature (crypto/asymmetric_keys/verify_pefile.c:436)\n  kexec_kernel_verify_pe_sig (kernel/kexec_file.c:151)\n  __do_sys_kexec_file_load (kernel/kexec_file.c:406)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n  </TASK>\n Kernel panic - not syncing: Fatal exception\n\nValidate that the addition does not overflow and the result does not\nexceed pelen before the subtraction. Return -ELIBBAD on failure."}],"providerMetadata":{"dateUpdated":"2026-07-27T20:10:36.101Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/89efd998470a93284b7ad5a20d4e0e3c6858ae8e"},{"url":"https://git.kernel.org/stable/c/7016377699b5b25b7ec3c0bf2ec3f983c7e95f7c"},{"url":"https://git.kernel.org/stable/c/b798ada5a5d1cb4cc4cfa72074b1b463eca6c506"},{"url":"https://git.kernel.org/stable/c/627938383761fb4334b41ebe7ef438d6b8b19d60"},{"url":"https://git.kernel.org/stable/c/e162bc386e71b5412425a38ee048e8d2185491b9"},{"url":"https://git.kernel.org/stable/c/6acd2fbd00f9c72aebefce63fc2e73e8f3d79061"},{"url":"https://git.kernel.org/stable/c/803591785d33cf13b6f73ce2796e8b9e6d5e6526"},{"url":"https://git.kernel.org/stable/c/f7dd32c5179d7755de18e21d5674b08f9e5cb180"}],"title":"crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64544","datePublished":"2026-07-27T20:10:36.101Z","dateReserved":"2026-07-19T15:36:31.795Z","dateUpdated":"2026-07-27T20:10:36.101Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-27 21:17:06","lastModifiedDate":"2026-07-27 21:17:06","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64544","Ordinal":"1","Title":"crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_conte","CVE":"CVE-2026-64544","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64544","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: asymmetric_keys - fix OOB read in pefile_digest_pe_contents\n\npefile_digest_pe_contents() computes the trailing-data hash length as\npelen - (hashed_bytes + certs_size). A crafted PE can make the addition\nexceed pelen, causing the unsigned subtraction to underflow to ~4 GiB.\nThis is passed to crypto_shash_update() which reads out of bounds and\npanics on unmapped vmalloc guard pages.\n\n BUG: unable to handle page fault for address: ffffc900038d8000\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n RIP: 0010:sha256_blocks_generic (lib/crypto/sha256.c:152)\n Call Trace:\n  <TASK>\n  __sha256_update (lib/crypto/sha256.c:208)\n  crypto_sha256_update (crypto/sha256.c:142)\n  verify_pefile_signature (crypto/asymmetric_keys/verify_pefile.c:436)\n  kexec_kernel_verify_pe_sig (kernel/kexec_file.c:151)\n  __do_sys_kexec_file_load (kernel/kexec_file.c:406)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n  </TASK>\n Kernel panic - not syncing: Fatal exception\n\nValidate that the addition does not overflow and the result does not\nexceed pelen before the subtraction. Return -ELIBBAD on failure.","Type":"Description","Title":"crypto: asymmetric_keys - fix OOB read in pefile_digest_pe_conte"}]}}}