{"api_version":"1","generated_at":"2026-04-25T12:37:48+00:00","cve":"CVE-2026-31533","urls":{"html":"https://cve.report/CVE-2026-31533","api":"https://cve.report/api/cve/CVE-2026-31533.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31533","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31533"},"summary":{"title":"net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-23 18:16:26","updated_at":"2026-04-24 14:38:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/02f3ecadb23558bbe068e6504118f1b712d4ece0","name":"https://git.kernel.org/stable/c/02f3ecadb23558bbe068e6504118f1b712d4ece0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/414fc5e5a5aff776c150f1b86770e0a25a35df3a","name":"https://git.kernel.org/stable/c/414fc5e5a5aff776c150f1b86770e0a25a35df3a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5d70eb25b41e9b010828cd12818b06a0c3b04412","name":"https://git.kernel.org/stable/c/5d70eb25b41e9b010828cd12818b06a0c3b04412","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2694d408b0e595024e0fc1d64ff9db0358580f74","name":"https://git.kernel.org/stable/c/2694d408b0e595024e0fc1d64ff9db0358580f74","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0e43e0a3c94044acc74b8e0927c27972eb5a59e8","name":"https://git.kernel.org/stable/c/0e43e0a3c94044acc74b8e0927c27972eb5a59e8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a9b8b18364fffce4c451e6f6fd218fa4ab646705","name":"https://git.kernel.org/stable/c/a9b8b18364fffce4c451e6f6fd218fa4ab646705","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aa9facde6c5005205874c37db3fd25799d741baf","name":"https://git.kernel.org/stable/c/aa9facde6c5005205874c37db3fd25799d741baf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31533","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31533","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3ade391adc584f17b5570fd205de3ad029090368 414fc5e5a5aff776c150f1b86770e0a25a35df3a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 02f3ecadb23558bbe068e6504118f1b712d4ece0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 13eca403876bbea3716e82cdfe6f1e6febb38754 0e43e0a3c94044acc74b8e0927c27972eb5a59e8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8590541473188741055d27b955db0777569438e3 aa9facde6c5005205874c37db3fd25799d741baf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8590541473188741055d27b955db0777569438e3 5d70eb25b41e9b010828cd12818b06a0c3b04412 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8590541473188741055d27b955db0777569438e3 2694d408b0e595024e0fc1d64ff9db0358580f74 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8590541473188741055d27b955db0777569438e3 a9b8b18364fffce4c451e6f6fd218fa4ab646705 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ab6397f072e5097f267abf5cb08a8004e6b17694 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 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 6.1.169 6.1.* 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":{"cve_year":"2026","cve_id":"31533","cve":"CVE-2026-31533","epss":"0.000140000","percentile":"0.026590000","score_date":"2026-04-24","updated_at":"2026-04-25 00:14:35"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/tls/tls_sw.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"414fc5e5a5aff776c150f1b86770e0a25a35df3a","status":"affected","version":"3ade391adc584f17b5570fd205de3ad029090368","versionType":"git"},{"lessThan":"02f3ecadb23558bbe068e6504118f1b712d4ece0","status":"affected","version":"cd1bbca03f3c1d845ce274c0d0a66de8e5929f72","versionType":"git"},{"lessThan":"0e43e0a3c94044acc74b8e0927c27972eb5a59e8","status":"affected","version":"13eca403876bbea3716e82cdfe6f1e6febb38754","versionType":"git"},{"lessThan":"aa9facde6c5005205874c37db3fd25799d741baf","status":"affected","version":"8590541473188741055d27b955db0777569438e3","versionType":"git"},{"lessThan":"5d70eb25b41e9b010828cd12818b06a0c3b04412","status":"affected","version":"8590541473188741055d27b955db0777569438e3","versionType":"git"},{"lessThan":"2694d408b0e595024e0fc1d64ff9db0358580f74","status":"affected","version":"8590541473188741055d27b955db0777569438e3","versionType":"git"},{"lessThan":"a9b8b18364fffce4c451e6f6fd218fa4ab646705","status":"affected","version":"8590541473188741055d27b955db0777569438e3","versionType":"git"},{"status":"affected","version":"ab6397f072e5097f267abf5cb08a8004e6b17694","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/tls/tls_sw.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","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":"5.15.203","versionStartIncluding":"5.15.160","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.169","versionStartIncluding":"6.1.84","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.135","versionStartIncluding":"6.6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.82","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.23","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.13","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.6","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-04-23T15:11:06.955Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31533","datePublished":"2026-04-23T15:11:06.955Z","dateReserved":"2026-03-09T15:48:24.113Z","dateUpdated":"2026-04-23T15:11:06.955Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-23 18:16:26","lastModifiedDate":"2026-04-24 14:38:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31533","Ordinal":"1","Title":"net/tls: fix use-after-free in -EBUSY error path of tls_do_encry","CVE":"CVE-2026-31533","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31533","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"net/tls: fix use-after-free in -EBUSY error path of tls_do_encry"}]}}}