{"api_version":"1","generated_at":"2026-04-23T09:53:25+00:00","cve":"CVE-2026-31515","urls":{"html":"https://cve.report/CVE-2026-31515","api":"https://cve.report/api/cve/CVE-2026-31515.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31515","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31515"},"summary":{"title":"af_key: validate families in pfkey_send_migrate()","description":"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","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-22 14:16:50","updated_at":"2026-04-22 14:16:50"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e06b596fc4eb01936a2e5dccad17c946d660bab8","name":"https://git.kernel.org/stable/c/e06b596fc4eb01936a2e5dccad17c946d660bab8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0c5aa8dd38887714f1aad04236a3620b56a5e4e","name":"https://git.kernel.org/stable/c/d0c5aa8dd38887714f1aad04236a3620b56a5e4e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8ddf8de7e758f6888988467af9ffc8adf589fb16","name":"https://git.kernel.org/stable/c/8ddf8de7e758f6888988467af9ffc8adf589fb16","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3225e6b9bd51ec177970a628fe4b11237ce87d5","name":"https://git.kernel.org/stable/c/d3225e6b9bd51ec177970a628fe4b11237ce87d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eb2d16a7d599dc9d4df391b5e660df9949963786","name":"https://git.kernel.org/stable/c/eb2d16a7d599dc9d4df391b5e660df9949963786","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ee836e820a40e2ca4da8af7310bff92d586772d4","name":"https://git.kernel.org/stable/c/ee836e820a40e2ca4da8af7310bff92d586772d4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7b18692c59afb8e5c364c8e3ac01e51dd6b52028","name":"https://git.kernel.org/stable/c/7b18692c59afb8e5c364c8e3ac01e51dd6b52028","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/83f644ea92987c100b82d8481ae2230faeed3d34","name":"https://git.kernel.org/stable/c/83f644ea92987c100b82d8481ae2230faeed3d34","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31515","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31515","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece d0c5aa8dd38887714f1aad04236a3620b56a5e4e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece e06b596fc4eb01936a2e5dccad17c946d660bab8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece 8ddf8de7e758f6888988467af9ffc8adf589fb16 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece d3225e6b9bd51ec177970a628fe4b11237ce87d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece 7b18692c59afb8e5c364c8e3ac01e51dd6b52028 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece 83f644ea92987c100b82d8481ae2230faeed3d34 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece ee836e820a40e2ca4da8af7310bff92d586772d4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08de61beab8a21c8e0b3906a97defda5f1f66ece eb2d16a7d599dc9d4df391b5e660df9949963786 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.21","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.21 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.253 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.131 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.80 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/key/af_key.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d0c5aa8dd38887714f1aad04236a3620b56a5e4e","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"},{"lessThan":"e06b596fc4eb01936a2e5dccad17c946d660bab8","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"},{"lessThan":"8ddf8de7e758f6888988467af9ffc8adf589fb16","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"},{"lessThan":"d3225e6b9bd51ec177970a628fe4b11237ce87d5","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"},{"lessThan":"7b18692c59afb8e5c364c8e3ac01e51dd6b52028","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"},{"lessThan":"83f644ea92987c100b82d8481ae2230faeed3d34","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"},{"lessThan":"ee836e820a40e2ca4da8af7310bff92d586772d4","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"},{"lessThan":"eb2d16a7d599dc9d4df391b5e660df9949963786","status":"affected","version":"08de61beab8a21c8e0b3906a97defda5f1f66ece","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/key/af_key.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.21"},{"lessThan":"2.6.21","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.131","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.80","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.21","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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"}],"providerMetadata":{"dateUpdated":"2026-04-22T13:54:32.194Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31515","datePublished":"2026-04-22T13:54:32.194Z","dateReserved":"2026-03-09T15:48:24.107Z","dateUpdated":"2026-04-22T13:54:32.194Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-22 14:16:50","lastModifiedDate":"2026-04-22 14:16:50","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31515","Ordinal":"1","Title":"af_key: validate families in pfkey_send_migrate()","CVE":"CVE-2026-31515","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31515","Ordinal":"1","NoteData":"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","Type":"Description","Title":"af_key: validate families in pfkey_send_migrate()"}]}}}