{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31515","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.107Z","datePublished":"2026-04-22T13:54:32.194Z","dateUpdated":"2026-05-11T22:10:17.324Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:10:17.324Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_key: validate families in pfkey_send_migrate()\n\nsyzbot was able to trigger a crash in skb_put() [1]\n\nIssue is that pfkey_send_migrate() does not check old/new families,\nand that set_ipsecrequest() @family argument was truncated,\nthus possibly overfilling the skb.\n\nValidate families early, do not wait set_ipsecrequest().\n\n[1]\n\nskbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:<NULL>\n kernel BUG at net/core/skbuff.c:214 !\nCall Trace:\n <TASK>\n  skb_over_panic net/core/skbuff.c:219 [inline]\n  skb_put+0x159/0x210 net/core/skbuff.c:2655\n  skb_put_zero include/linux/skbuff.h:2788 [inline]\n  set_ipsecrequest net/key/af_key.c:3532 [inline]\n  pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636\n  km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848\n  xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705\n  xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/key/af_key.c"],"versions":[{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"d0c5aa8dd38887714f1aad04236a3620b56a5e4e","status":"affected","versionType":"git"},{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"e06b596fc4eb01936a2e5dccad17c946d660bab8","status":"affected","versionType":"git"},{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"8ddf8de7e758f6888988467af9ffc8adf589fb16","status":"affected","versionType":"git"},{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"d3225e6b9bd51ec177970a628fe4b11237ce87d5","status":"affected","versionType":"git"},{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"7b18692c59afb8e5c364c8e3ac01e51dd6b52028","status":"affected","versionType":"git"},{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"83f644ea92987c100b82d8481ae2230faeed3d34","status":"affected","versionType":"git"},{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"ee836e820a40e2ca4da8af7310bff92d586772d4","status":"affected","versionType":"git"},{"version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","lessThan":"eb2d16a7d599dc9d4df391b5e660df9949963786","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/key/af_key.c"],"versions":[{"version":"2.6.21","status":"affected"},{"version":"0","lessThan":"2.6.21","status":"unaffected","versionType":"semver"},{"version":"5.10.253","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.131","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.80","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.21","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.11","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","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":"2.6.21","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.21","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.21","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.21","versionEndExcluding":"6.6.131"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.21","versionEndExcluding":"6.12.80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.21","versionEndExcluding":"6.18.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.21","versionEndExcluding":"6.19.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.21","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d0c5aa8dd38887714f1aad04236a3620b56a5e4e"},{"url":"https://git.kernel.org/stable/c/e06b596fc4eb01936a2e5dccad17c946d660bab8"},{"url":"https://git.kernel.org/stable/c/8ddf8de7e758f6888988467af9ffc8adf589fb16"},{"url":"https://git.kernel.org/stable/c/d3225e6b9bd51ec177970a628fe4b11237ce87d5"},{"url":"https://git.kernel.org/stable/c/7b18692c59afb8e5c364c8e3ac01e51dd6b52028"},{"url":"https://git.kernel.org/stable/c/83f644ea92987c100b82d8481ae2230faeed3d34"},{"url":"https://git.kernel.org/stable/c/ee836e820a40e2ca4da8af7310bff92d586772d4"},{"url":"https://git.kernel.org/stable/c/eb2d16a7d599dc9d4df391b5e660df9949963786"}],"title":"af_key: validate families in pfkey_send_migrate()","x_generator":{"engine":"bippy-1.2.0"}}}}