{"id":"CVE-2023-6546","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-6546","generatedAt":"2026-10-28T01:10:53.171Z","title":"A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel.","description":"A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.","published":"2023-12-21T20:15:08.000Z","lastModified":"2026-08-06T22:16:39.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-366","CWE-362"],"affected":["linux/linux kernel","fedoraproject/fedora","redhat/enterprise linux"],"epss":{"score":0.00735,"percentile":0.54172,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2024:0930","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0937","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1018","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1019","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1055","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1250","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1253","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1306","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1607","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1612","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:1614","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:2093","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:2394","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:2621","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:2697","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:4577","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:4729","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:4731","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:4970","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2023-6546","tags":["Third 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Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2255498","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/torvalds/linux/commit/3c4f8333b582487a2d1e02171f1465531cde53e3","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-CAN-20527","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-6546","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}