{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52981","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.376Z","datePublished":"2026-06-24T16:28:57.074Z","dateUpdated":"2026-06-28T06:37:33.379Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-28T06:37:33.379Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nneigh: let neigh_xmit take skb ownership\n\nneigh_xmit always releases the skb, except when no neighbour table is\nfound. But even the first added user of neigh_xmit (mpls) relied on\nneigh_xmit to release the skb (or queue it for tx).\n\nsashiko reported:\n If neigh_xmit() is called with an uninitialized neighbor table (for\n example, NEIGH_ND_TABLE when IPv6 is disabled), it returns -EAFNOSUPPORT\n and bypasses its internal out_kfree_skb error path.  Because the return\n value of neigh_xmit() is ignored here, does this leak the SKB?\n\nAssume full ownership and remove the last code path that doesn't\nxmit or free skb."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/neighbour.c"],"versions":[{"version":"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62","lessThan":"8a89054a1ec0767aec25ed2bbac933da6ba3cf5a","status":"affected","versionType":"git"},{"version":"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62","lessThan":"9247d59ca15bf60a57dca08103f055d8a4340877","status":"affected","versionType":"git"},{"version":"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62","lessThan":"0084712e0bee204b284510cdb63182fd5a30c2b7","status":"affected","versionType":"git"},{"version":"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62","lessThan":"63063ba60d2dc334e34f1e3f9271d7f3f6f30307","status":"affected","versionType":"git"},{"version":"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62","lessThan":"445e45a2c3a078316a62d2d331a570cf34ef5079","status":"affected","versionType":"git"},{"version":"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62","lessThan":"4438113be604ee67a7bf4f81da6e1cca41332ce4","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/core/neighbour.c"],"versions":[{"version":"4.1","status":"affected"},{"version":"0","lessThan":"4.1","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.141","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.91","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.33","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.10","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":"4.1","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8a89054a1ec0767aec25ed2bbac933da6ba3cf5a"},{"url":"https://git.kernel.org/stable/c/9247d59ca15bf60a57dca08103f055d8a4340877"},{"url":"https://git.kernel.org/stable/c/0084712e0bee204b284510cdb63182fd5a30c2b7"},{"url":"https://git.kernel.org/stable/c/63063ba60d2dc334e34f1e3f9271d7f3f6f30307"},{"url":"https://git.kernel.org/stable/c/445e45a2c3a078316a62d2d331a570cf34ef5079"},{"url":"https://git.kernel.org/stable/c/4438113be604ee67a7bf4f81da6e1cca41332ce4"}],"title":"neigh: let neigh_xmit take skb ownership","x_generator":{"engine":"bippy-1.2.0"}}}}