{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31671","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.130Z","datePublished":"2026-04-24T14:45:18.669Z","dateUpdated":"2026-05-11T22:13:23.374Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:13:23.374Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_user.c"],"versions":[{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"d27c02eec529f78055a46a5c9e6c62684382b2d8","status":"affected","versionType":"git"},{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"716c546e88cfe49d841658240e10cb57bc50a2cc","status":"affected","versionType":"git"},{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9","status":"affected","versionType":"git"},{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"e0c8542c3d097ed4205ded51868195d5d6ddac62","status":"affected","versionType":"git"},{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"ff5ee507302303b15859753c3e0d67d38fd12c88","status":"affected","versionType":"git"},{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"6c55714c931051cd7f4839c19ce0867179fd22fe","status":"affected","versionType":"git"},{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72","status":"affected","versionType":"git"},{"version":"97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5","lessThan":"d10119968d0e1f2b669604baf2a8b5fdb72fa6b4","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/xfrm/xfrm_user.c"],"versions":[{"version":"2.6.19","status":"affected"},{"version":"0","lessThan":"2.6.19","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":"6.1.169","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.135","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.82","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.23","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.13","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":"2.6.19","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"6.1.169"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"6.6.135"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"6.12.82"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"6.18.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"6.19.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"7.0"}]}]}],"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"}}}}