{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53212","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.391Z","datePublished":"2026-06-25T08:39:16.888Z","dateUpdated":"2026-06-28T06:40:26.976Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-28T06:40:26.976Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_tunnel: fix use-after-free on object destroy\n\nnft_tunnel_obj_destroy() calls metadata_dst_free() which directly\nkfree()s the metadata_dst, ignoring the dst_entry refcount. Packets\nthat took a reference via dst_hold() in nft_tunnel_obj_eval() and\nare still queued (e.g. in a netem qdisc) are left with a dangling\npointer. When these packets are eventually dequeued, dst_release()\noperates on freed memory.\n\nReplace metadata_dst_free() with dst_release() so the metadata_dst\nis freed only after all references are dropped. The dst subsystem\nalready handles metadata_dst cleanup in dst_destroy() when\nDST_METADATA is set."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_tunnel.c"],"versions":[{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"349df61526d2e39decc685d246202e3e284cfe05","status":"affected","versionType":"git"},{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"55b79b1ae42372012413ce0413181d26679b17ef","status":"affected","versionType":"git"},{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"5e9ee18b27fde88cb6148202b33916c66693fe82","status":"affected","versionType":"git"},{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"8767fe4079affa74314d7eb3220e700150289842","status":"affected","versionType":"git"},{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"fda6573a46ad24f35348e024905ee5bdf729797e","status":"affected","versionType":"git"},{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3","status":"affected","versionType":"git"},{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"f9a0e4b61054cde89a2a77845293c726cc07cc43","status":"affected","versionType":"git"},{"version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","lessThan":"c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a","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_tunnel.c"],"versions":[{"version":"4.19","status":"affected"},{"version":"0","lessThan":"4.19","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":"4.19","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/349df61526d2e39decc685d246202e3e284cfe05"},{"url":"https://git.kernel.org/stable/c/55b79b1ae42372012413ce0413181d26679b17ef"},{"url":"https://git.kernel.org/stable/c/5e9ee18b27fde88cb6148202b33916c66693fe82"},{"url":"https://git.kernel.org/stable/c/8767fe4079affa74314d7eb3220e700150289842"},{"url":"https://git.kernel.org/stable/c/fda6573a46ad24f35348e024905ee5bdf729797e"},{"url":"https://git.kernel.org/stable/c/941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3"},{"url":"https://git.kernel.org/stable/c/f9a0e4b61054cde89a2a77845293c726cc07cc43"},{"url":"https://git.kernel.org/stable/c/c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a"}],"title":"netfilter: nft_tunnel: fix use-after-free on object destroy","x_generator":{"engine":"bippy-1.2.0"}}}}