{"id":"CVE-2026-99220","aliases":[],"cve":{"records":[{"id":"CVE-2026-99220","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.401Z","published":"2026-11-02T16:06:31.966Z","modified":"2026-11-03T19:12:54.971Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-03T19:12:54.971Z"}],"references":[{"url":"https://git.kernel.org/stable/c/889a2293a95f6c2880bf73b67f9b0af23251a128","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/7f0728ba89624e25df2bb80ff59bbfb545060935","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/2a40bdd4409567de4c2a141ac66439dc238af752","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/1aa0c7aa4c2554a5b6d74ae1924508ca4718234b","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/33a078f04e264eb71aa9f209cb334e4010123818","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/57e54b6939c6539d90a81c7e57531901d5991651","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/9695df3b1db4ac4534274d38ee16e3b9b0bf910e","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.12.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.18.60"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"7.2.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"7.3.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"7.4-rc1"}]}]}]}],"prioritization":[]},"title":"asymmetric_keys: reject trust keys without IDs","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nasymmetric_keys: reject trust keys without IDs\n\nThe PKCS#8 parser deliberately leaves the asym_key_ids payload slot\nempty. key_or_keyring_common() unconditionally dereferences that slot\nwhen a PKCS#8 key is supplied to a key_or_keyring restriction. Both the\nplain and :chain forms reach this branch, allowing an unprivileged caller\nto trigger a NULL pointer dereference through KEYCTL_RESTRICT_KEYRING\nfollowed by add_key().\n\n Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:key_or_keyring_common (crypto/asymmetric_keys/restrict.c:205 crypto/asymmetric_keys/restrict.c:279)\n Call Trace:\n  <TASK>\n  __key_create_or_update (security/keys/key.c:884)\n  key_create_or_update (security/keys/key.c:1021)\n  __do_sys_add_key (security/keys/keyctl.c:134)\n  do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n  </TASK>\n Kernel panic - not syncing: Fatal exception\n\nReject an asymmetric restriction key without key IDs. A PKCS#8 private\nkey cannot identify the signer of a candidate certificate and is not a\nvalid trust anchor.","score":null,"severity":"unknown","published":"2026-11-02T16:06:31.966Z","modified":"2026-11-03T19:12:54.971Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"3c58b2362ba828ee2970c66c6a6fd7b04fde4413","status":"affected","lessThan":"889a2293a95f6c2880bf73b67f9b0af23251a128","versionType":"git"},{"version":"3c58b2362ba828ee2970c66c6a6fd7b04fde4413","status":"affected","lessThan":"7f0728ba89624e25df2bb80ff59bbfb545060935","versionType":"git"},{"version":"3c58b2362ba828ee2970c66c6a6fd7b04fde4413","status":"affected","lessThan":"2a40bdd4409567de4c2a141ac66439dc238af752","versionType":"git"},{"version":"3c58b2362ba828ee2970c66c6a6fd7b04fde4413","status":"affected","lessThan":"1aa0c7aa4c2554a5b6d74ae1924508ca4718234b","versionType":"git"},{"version":"3c58b2362ba828ee2970c66c6a6fd7b04fde4413","status":"affected","lessThan":"33a078f04e264eb71aa9f209cb334e4010123818","versionType":"git"},{"version":"3c58b2362ba828ee2970c66c6a6fd7b04fde4413","status":"affected","lessThan":"57e54b6939c6539d90a81c7e57531901d5991651","versionType":"git"},{"version":"3c58b2362ba828ee2970c66c6a6fd7b04fde4413","status":"affected","lessThan":"9695df3b1db4ac4534274d38ee16e3b9b0bf910e","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99220"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.60","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.14","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3.1","status":"unaffected","lessThanOrEqual":"7.3.*","versionType":"semver"},{"version":"7.4-rc1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99220"}],"remediation":[],"references":["https://git.kernel.org/stable/c/889a2293a95f6c2880bf73b67f9b0af23251a128","https://git.kernel.org/stable/c/7f0728ba89624e25df2bb80ff59bbfb545060935","https://git.kernel.org/stable/c/2a40bdd4409567de4c2a141ac66439dc238af752","https://git.kernel.org/stable/c/1aa0c7aa4c2554a5b6d74ae1924508ca4718234b","https://git.kernel.org/stable/c/33a078f04e264eb71aa9f209cb334e4010123818","https://git.kernel.org/stable/c/57e54b6939c6539d90a81c7e57531901d5991651","https://git.kernel.org/stable/c/9695df3b1db4ac4534274d38ee16e3b9b0bf910e"],"sources":[{"name":"CVE","id":"CVE-2026-99220","modified":"2026-11-03T19:12:54.971Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99220"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-11-03T19:48:19.241Z","kev":{"status":"not-listed","checkedAt":"2026-11-06T21:20:33.816Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-03T09:05:32.022Z","attemptedAt":"2026-11-03T09:05:32.022Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-03T09:05:32.011Z","attemptedAt":"2026-11-03T09:05:32.011Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-03T09:05:32.072Z","attemptedAt":"2026-11-03T09:05:32.072Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-03T09:05:31.879Z","attemptedAt":"2026-11-03T09:05:31.879Z"}],"evidence":[{"source":"GitHub Advisory Database","id":"GHSA-3f74-mwpq-qqxv","url":"https://github.com/advisories/GHSA-3f74-mwpq-qqxv","modified":"2026-11-02T18:32:31Z","checkedAt":"2026-11-03T09:05:32.011Z"},{"source":"NVD","id":"CVE-2026-99220","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99220","modified":"2026-11-02T16:17:46.113","checkedAt":"2026-11-03T09:05:32.022Z"},{"source":"ENISA EUVD","id":"EUVD-2026-115262","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-115262","modified":"Nov 2, 2026, 4:06:31 PM","checkedAt":"2026-11-03T09:05:32.072Z"}],"aiSummary":{"text":"The Linux kernel is vulnerable to a NULL pointer dereference when an unprivileged caller supplies a PKCS#8 key without IDs to a key_or_keyring restriction. Affected versions include Linux kernel versions starting from 4.20. The vulnerability can cause a general protection fault and kernel panic.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-03T21:11:10.632Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-99220"}]}}