{"api_version":"1","generated_at":"2026-04-25T22:38:50+00:00","cve":"CVE-2026-31671","urls":{"html":"https://cve.report/CVE-2026-31671","api":"https://cve.report/api/cve/CVE-2026-31671.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31671","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31671"},"summary":{"title":"xfrm_user: fix info leak in build_report()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_report()\n\nstruct xfrm_user_report is a __u8 proto field followed by a struct\nxfrm_selector which means there is three \"empty\" bytes of padding, but\nthe padding is never zeroed before copying to userspace.  Fix that up by\nzeroing the structure before setting individual member variables.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-24 15:16:46","updated_at":"2026-04-24 17:51:40"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe","name":"https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8","name":"https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc","name":"https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9","name":"https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72","name":"https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4","name":"https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62","name":"https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88","name":"https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31671","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31671","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 d27c02eec529f78055a46a5c9e6c62684382b2d8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 716c546e88cfe49d841658240e10cb57bc50a2cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e0c8542c3d097ed4205ded51868195d5d6ddac62 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.135 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.82 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.23 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.13 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/xfrm/xfrm_user.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d27c02eec529f78055a46a5c9e6c62684382b2d8","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"716c546e88cfe49d841658240e10cb57bc50a2cc","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"e0c8542c3d097ed4205ded51868195d5d6ddac62","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"ff5ee507302303b15859753c3e0d67d38fd12c88","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6c55714c931051cd7f4839c19ce0867179fd22fe","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d10119968d0e1f2b669604baf2a8b5fdb72fa6b4","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/xfrm/xfrm_user.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"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":"6.1.169","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.135","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.82","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.23","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.13","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","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.169","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.135","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.82","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.23","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_report()\n\nstruct xfrm_user_report is a __u8 proto field followed by a struct\nxfrm_selector which means there is three \"empty\" bytes of padding, but\nthe padding is never zeroed before copying to userspace.  Fix that up by\nzeroing the structure before setting individual member variables."}],"providerMetadata":{"dateUpdated":"2026-04-24T14:45:18.669Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8"},{"url":"https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc"},{"url":"https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9"},{"url":"https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62"},{"url":"https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88"},{"url":"https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe"},{"url":"https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72"},{"url":"https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4"}],"title":"xfrm_user: fix info leak in build_report()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31671","datePublished":"2026-04-24T14:45:18.669Z","dateReserved":"2026-03-09T15:48:24.130Z","dateUpdated":"2026-04-24T14:45:18.669Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-24 15:16:46","lastModifiedDate":"2026-04-24 17:51:40","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31671","Ordinal":"1","Title":"xfrm_user: fix info leak in build_report()","CVE":"CVE-2026-31671","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31671","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_report()\n\nstruct xfrm_user_report is a __u8 proto field followed by a struct\nxfrm_selector which means there is three \"empty\" bytes of padding, but\nthe padding is never zeroed before copying to userspace.  Fix that up by\nzeroing the structure before setting individual member variables.","Type":"Description","Title":"xfrm_user: fix info leak in build_report()"}]}}}