{"id":"CVE-2026-90057","revision":"a69531eaac034b3db32d04704506911b","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":[]}