{"id":"CVE-2026-90057","revision":null,"records":[{"revision":"a69531eaac034b3db32d04704506911b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90057","aliases":[],"title":"slip: remove slip_hangup() to fix use-after-free in slip_receive_buf()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nslip: remove slip_hangup() to fix use-after-free in slip_receive_buf()\n\nJaeyoung Chung and Eulgyu Kim reported a slab-use-after-free read\nin slip_receive_buf() when racing against tty hangup.\n\ntty_ldisc_hangup() calls ld->ops->hangup() while holding only\na read lock on tty->ldisc_sem (via tty_ldisc_ref()).\nBecause slip_hangup() simply called slip_close(), it ran concurrently\nwith reader functions such as slip_receive_buf().\n\nslip_close() unregisters and frees the net device and its private\nstruct slip, causing concurrent reader threads in slip_receive_buf()\nto dereference freed memory.\n\nLine discipline close() is already guaranteed to be called under\nthe write lock of tty->ldisc_sem during hangup processing\n(in tty_ldisc_reinit() or tty_ldisc_kill()).\n\nRemove slip_hangup() so teardown is serialized cleanly by slip_close().","state":0,"publishedAt":"2026-09-17T16:05:41.67+00:00","modifiedAt":"2026-10-19T08:57:14.597+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/slip/slip.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5342b77c4123ba39f911d92a813295fb3bb21f69\",\n \"lessThan\": \"9a3b1edff1ecb47d323f2506b3ffc22178acd1c6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5342b77c4123ba39f911d92a813295fb3bb21f69\",\n \"lessThan\": \"a2dbac3fb03b4427ccf057debc83fc61ee102529\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5342b77c4123ba39f911d92a813295fb3bb21f69\",\n \"lessThan\": \"de1f978c0f6ab42b28192d74dc59af52fdc76135\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5342b77c4123ba39f911d92a813295fb3bb21f69\",\n \"lessThan\": \"ddbc5dc5a2e29b3934da09c1ba3c930fd8a40fd6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5342b77c4123ba39f911d92a813295fb3bb21f69\",\n \"lessThan\": \"a540a49fcca59d1c92c3a6462e67ca21676a88df\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5342b77c4123ba39f911d92a813295fb3bb21f69\",\n \"lessThan\": \"23c53269f2baaedf2d92784290cb9ef6db2a3bce\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/slip/slip.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.32\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.32\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.188\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.157\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.110\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.52\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.6\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/9a3b1edff1ecb47d323f2506b3ffc22178acd1c6","https://git.kernel.org/stable/c/a2dbac3fb03b4427ccf057debc83fc61ee102529","https://git.kernel.org/stable/c/de1f978c0f6ab42b28192d74dc59af52fdc76135","https://git.kernel.org/stable/c/ddbc5dc5a2e29b3934da09c1ba3c930fd8a40fd6","https://git.kernel.org/stable/c/a540a49fcca59d1c92c3a6462e67ca21676a88df","https://git.kernel.org/stable/c/23c53269f2baaedf2d92784290cb9ef6db2a3bce"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90057","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90057","identifiers":["CVE-2026-90057"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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