{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31533","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.113Z","datePublished":"2026-04-23T15:11:06.955Z","dateUpdated":"2026-04-27T14:03:54.811Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-04-27T14:03:54.811Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tls: fix use-after-free in -EBUSY error path of tls_do_encryption\n\nThe -EBUSY handling in tls_do_encryption(), introduced by commit\n859054147318 (\"net: tls: handle backlogging of crypto requests\"), has\na use-after-free due to double cleanup of encrypt_pending and the\nscatterlist entry.\n\nWhen crypto_aead_encrypt() returns -EBUSY, the request is enqueued to\nthe cryptd backlog and the async callback tls_encrypt_done() will be\ninvoked upon completion. That callback unconditionally restores the\nscatterlist entry (sge->offset, sge->length) and decrements\nctx->encrypt_pending. However, if tls_encrypt_async_wait() returns an\nerror, the synchronous error path in tls_do_encryption() performs the\nsame cleanup again, double-decrementing encrypt_pending and\ndouble-restoring the scatterlist.\n\nThe double-decrement corrupts the encrypt_pending sentinel (initialized\nto 1), making tls_encrypt_async_wait() permanently skip the wait for\npending async callbacks. A subsequent sendmsg can then free the\ntls_rec via bpf_exec_tx_verdict() while a cryptd callback is still\npending, resulting in a use-after-free when the callback fires on the\nfreed record.\n\nFix this by skipping the synchronous cleanup when the -EBUSY async\nwait returns an error, since the callback has already handled\nencrypt_pending and sge restoration."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tls/tls_sw.c"],"versions":[{"version":"3ade391adc584f17b5570fd205de3ad029090368","lessThan":"414fc5e5a5aff776c150f1b86770e0a25a35df3a","status":"affected","versionType":"git"},{"version":"cd1bbca03f3c1d845ce274c0d0a66de8e5929f72","lessThan":"02f3ecadb23558bbe068e6504118f1b712d4ece0","status":"affected","versionType":"git"},{"version":"13eca403876bbea3716e82cdfe6f1e6febb38754","lessThan":"0e43e0a3c94044acc74b8e0927c27972eb5a59e8","status":"affected","versionType":"git"},{"version":"8590541473188741055d27b955db0777569438e3","lessThan":"aa9facde6c5005205874c37db3fd25799d741baf","status":"affected","versionType":"git"},{"version":"8590541473188741055d27b955db0777569438e3","lessThan":"5d70eb25b41e9b010828cd12818b06a0c3b04412","status":"affected","versionType":"git"},{"version":"8590541473188741055d27b955db0777569438e3","lessThan":"2694d408b0e595024e0fc1d64ff9db0358580f74","status":"affected","versionType":"git"},{"version":"8590541473188741055d27b955db0777569438e3","lessThan":"a9b8b18364fffce4c451e6f6fd218fa4ab646705","status":"affected","versionType":"git"},{"version":"ab6397f072e5097f267abf5cb08a8004e6b17694","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/tls/tls_sw.c"],"versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","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":"5.15.160","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.84","versionEndExcluding":"6.1.169"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.18","versionEndExcluding":"6.6.135"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.82"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.19.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.6"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/414fc5e5a5aff776c150f1b86770e0a25a35df3a"},{"url":"https://git.kernel.org/stable/c/02f3ecadb23558bbe068e6504118f1b712d4ece0"},{"url":"https://git.kernel.org/stable/c/0e43e0a3c94044acc74b8e0927c27972eb5a59e8"},{"url":"https://git.kernel.org/stable/c/aa9facde6c5005205874c37db3fd25799d741baf"},{"url":"https://git.kernel.org/stable/c/5d70eb25b41e9b010828cd12818b06a0c3b04412"},{"url":"https://git.kernel.org/stable/c/2694d408b0e595024e0fc1d64ff9db0358580f74"},{"url":"https://git.kernel.org/stable/c/a9b8b18364fffce4c451e6f6fd218fa4ab646705"}],"title":"net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption","x_generator":{"engine":"bippy-1.2.0"}}}}