{"api_version":"1","generated_at":"2026-04-25T12:39:25+00:00","cve":"CVE-2026-31635","urls":{"html":"https://cve.report/CVE-2026-31635","api":"https://cve.report/api/cve/CVE-2026-31635.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31635","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31635"},"summary":{"title":"rxrpc: fix oversized RESPONSE authenticator length check","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix oversized RESPONSE authenticator length check\n\nrxgk_verify_response() decodes auth_len from the packet and is supposed\nto verify that it fits in the remaining bytes. The existing check is\ninverted, so oversized RESPONSE authenticators are accepted and passed\nto rxgk_decrypt_skb(), which can later reach skb_to_sgvec() with an\nimpossible length and hit BUG_ON(len).\n\nDecoded from the original latest-net reproduction logs with\nscripts/decode_stacktrace.sh:\n\nRIP: __skb_to_sgvec()\n  [net/core/skbuff.c:5285 (discriminator 1)]\nCall Trace:\n skb_to_sgvec() [net/core/skbuff.c:5305]\n rxgk_decrypt_skb() [net/rxrpc/rxgk_common.h:81]\n rxgk_verify_response() [net/rxrpc/rxgk.c:1268]\n rxrpc_process_connection()\n   [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364\n    net/rxrpc/conn_event.c:386]\n process_one_work() [kernel/workqueue.c:3281]\n worker_thread()\n   [kernel/workqueue.c:3353 kernel/workqueue.c:3440]\n kthread() [kernel/kthread.c:436]\n ret_from_fork() [arch/x86/kernel/process.c:164]\n\nReject authenticator lengths that exceed the remaining packet payload.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-24 15:16:42","updated_at":"2026-04-24 17:51:40"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/beee051f259acd286fed64c32c2b31e6f5097eb5","name":"https://git.kernel.org/stable/c/beee051f259acd286fed64c32c2b31e6f5097eb5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e2f1a80d8b1ed6a5ae585a399c2b46500bdcc305","name":"https://git.kernel.org/stable/c/e2f1a80d8b1ed6a5ae585a399c2b46500bdcc305","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a2567217ade970ecc458144b6be469bc015b23e5","name":"https://git.kernel.org/stable/c/a2567217ade970ecc458144b6be469bc015b23e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31635","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31635","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a beee051f259acd286fed64c32c2b31e6f5097eb5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a e2f1a80d8b1ed6a5ae585a399c2b46500bdcc305 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a a2567217ade970ecc458144b6be469bc015b23e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16 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/rxrpc/rxgk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"beee051f259acd286fed64c32c2b31e6f5097eb5","status":"affected","version":"9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a","versionType":"git"},{"lessThan":"e2f1a80d8b1ed6a5ae585a399c2b46500bdcc305","status":"affected","version":"9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a","versionType":"git"},{"lessThan":"a2567217ade970ecc458144b6be469bc015b23e5","status":"affected","version":"9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/rxrpc/rxgk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","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":"6.18.23","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.13","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix oversized RESPONSE authenticator length check\n\nrxgk_verify_response() decodes auth_len from the packet and is supposed\nto verify that it fits in the remaining bytes. The existing check is\ninverted, so oversized RESPONSE authenticators are accepted and passed\nto rxgk_decrypt_skb(), which can later reach skb_to_sgvec() with an\nimpossible length and hit BUG_ON(len).\n\nDecoded from the original latest-net reproduction logs with\nscripts/decode_stacktrace.sh:\n\nRIP: __skb_to_sgvec()\n  [net/core/skbuff.c:5285 (discriminator 1)]\nCall Trace:\n skb_to_sgvec() [net/core/skbuff.c:5305]\n rxgk_decrypt_skb() [net/rxrpc/rxgk_common.h:81]\n rxgk_verify_response() [net/rxrpc/rxgk.c:1268]\n rxrpc_process_connection()\n   [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364\n    net/rxrpc/conn_event.c:386]\n process_one_work() [kernel/workqueue.c:3281]\n worker_thread()\n   [kernel/workqueue.c:3353 kernel/workqueue.c:3440]\n kthread() [kernel/kthread.c:436]\n ret_from_fork() [arch/x86/kernel/process.c:164]\n\nReject authenticator lengths that exceed the remaining packet payload."}],"providerMetadata":{"dateUpdated":"2026-04-24T14:44:49.963Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/beee051f259acd286fed64c32c2b31e6f5097eb5"},{"url":"https://git.kernel.org/stable/c/e2f1a80d8b1ed6a5ae585a399c2b46500bdcc305"},{"url":"https://git.kernel.org/stable/c/a2567217ade970ecc458144b6be469bc015b23e5"}],"title":"rxrpc: fix oversized RESPONSE authenticator length check","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31635","datePublished":"2026-04-24T14:44:49.963Z","dateReserved":"2026-03-09T15:48:24.125Z","dateUpdated":"2026-04-24T14:44:49.963Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-24 15:16:42","lastModifiedDate":"2026-04-24 17:51:40","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31635","Ordinal":"1","Title":"rxrpc: fix oversized RESPONSE authenticator length check","CVE":"CVE-2026-31635","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31635","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix oversized RESPONSE authenticator length check\n\nrxgk_verify_response() decodes auth_len from the packet and is supposed\nto verify that it fits in the remaining bytes. The existing check is\ninverted, so oversized RESPONSE authenticators are accepted and passed\nto rxgk_decrypt_skb(), which can later reach skb_to_sgvec() with an\nimpossible length and hit BUG_ON(len).\n\nDecoded from the original latest-net reproduction logs with\nscripts/decode_stacktrace.sh:\n\nRIP: __skb_to_sgvec()\n  [net/core/skbuff.c:5285 (discriminator 1)]\nCall Trace:\n skb_to_sgvec() [net/core/skbuff.c:5305]\n rxgk_decrypt_skb() [net/rxrpc/rxgk_common.h:81]\n rxgk_verify_response() [net/rxrpc/rxgk.c:1268]\n rxrpc_process_connection()\n   [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364\n    net/rxrpc/conn_event.c:386]\n process_one_work() [kernel/workqueue.c:3281]\n worker_thread()\n   [kernel/workqueue.c:3353 kernel/workqueue.c:3440]\n kthread() [kernel/kthread.c:436]\n ret_from_fork() [arch/x86/kernel/process.c:164]\n\nReject authenticator lengths that exceed the remaining packet payload.","Type":"Description","Title":"rxrpc: fix oversized RESPONSE authenticator length check"}]}}}