{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53218","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.392Z","datePublished":"2026-06-25T08:39:21.069Z","dateUpdated":"2026-11-06T16:24:07.597Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-25T08:39:21.069Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_exthdr: fix register tracking for F_PRESENT flag\n\nnft_exthdr_init() passes user-controlled priv->len to\nnft_parse_register_store(), which marks that many bytes in the\nregister bitmap as initialized.  However, when NFT_EXTHDR_F_PRESENT\nis set, the eval paths write only 1 byte (nft_reg_store8) or\n4 bytes (*dest = 0 on TCP/DCCP error path).  When len > 4,\nregisters beyond the first are never written, retaining\nuninitialized stack data from nft_regs.\n\nBail out if userspace requests too much data when F_PRESENT is set."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_exthdr.c"],"versions":[{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6","status":"affected","versionType":"git"},{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"19748967d59c31d24d21d40b728570788310b237","status":"affected","versionType":"git"},{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"46fc15a044e9938e7ea77786fb37edd2cd74f031","status":"affected","versionType":"git"},{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"cd513e43b4b2bd1de39e2367bc4261c699a8652f","status":"affected","versionType":"git"},{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"67b27434c43b68a97becda98c9f0c8cf6cba2134","status":"affected","versionType":"git"},{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"78069a6d8bc86c9e036eb82c2af4a19cc1871a53","status":"affected","versionType":"git"},{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265","status":"affected","versionType":"git"},{"version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","lessThan":"772cecf198da732faebb5dcfc46d66a505be8495","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_exthdr.c"],"versions":[{"version":"4.11","status":"affected"},{"version":"0","lessThan":"4.11","status":"unaffected","versionType":"semver"},{"version":"5.10.259","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.210","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.176","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.143","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.94","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.36","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.13","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6"},{"url":"https://git.kernel.org/stable/c/19748967d59c31d24d21d40b728570788310b237"},{"url":"https://git.kernel.org/stable/c/46fc15a044e9938e7ea77786fb37edd2cd74f031"},{"url":"https://git.kernel.org/stable/c/cd513e43b4b2bd1de39e2367bc4261c699a8652f"},{"url":"https://git.kernel.org/stable/c/67b27434c43b68a97becda98c9f0c8cf6cba2134"},{"url":"https://git.kernel.org/stable/c/78069a6d8bc86c9e036eb82c2af4a19cc1871a53"},{"url":"https://git.kernel.org/stable/c/f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265"},{"url":"https://git.kernel.org/stable/c/772cecf198da732faebb5dcfc46d66a505be8495"}],"title":"netfilter: 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