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CVE-2026-53212

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_tunnel: fix use-after-free on object destroy nft_tunnel_obj_destroy() calls metadata_dst_free() which directly kfree()s the metadata_dst, ignoring the dst_entry refcount. Packets that took a reference via dst_hold() in nft_tunnel_obj_eval() and are still queued (e.g. in a netem qdisc) are left with a dangling pointer. When these packets are eventually dequeued, dst_release() operates on freed memory. Replace me
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:37f19aa15e1291b5c8e3227de39b266a55da8db2e0586eb947cb91f92c3533b8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nft_tunnel.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.19"},{"lessThan":"4.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"le…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nft_tunnel.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"349df61526d2e39decc685d246202e3e284cfe05","status":"affected","version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","versionType":"git"},{"lessThan":"55b79b1ae42372012413ce0413181d26679b17ef","status":"affected","version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","versionType":"git"},{"lessThan":"5e9ee18b27fde88cb6148202b33916c66693fe82","status":"affected","version":"af308b94a2a4a5a27be…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nft_tunnel.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.19"},{"lessThan":"4.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"le…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nft_tunnel.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"349df61526d2e39decc685d246202e3e284cfe05","status":"affected","version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","versionType":"git"},{"lessThan":"55b79b1ae42372012413ce0413181d26679b17ef","status":"affected","version":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","versionType":"git"},{"lessThan":"5e9ee18b27fde88cb6148202b33916c66693fe82","status":"affected","version":"af308b94a2a4a5a27be…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/349df61526d2e39decc685d246202e3e284cfe05"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/55b79b1ae42372012413ce0413181d26679b17ef"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/5e9ee18b27fde88cb6148202b33916c66693fe82"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/8767fe4079affa74314d7eb3220e700150289842"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/f9a0e4b61054cde89a2a77845293c726cc07cc43"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/fda6573a46ad24f35348e024905ee5bdf729797e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcbdab4eb2ff535298adbf99f3137c41b08ca9839befcfb740d62b38029c8691 · sha256:41340fa09e55e157… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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