CVE-2023-52872
tty: n_gsm: fix race condition in status line change on dead connections
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix race condition in status line change on dead connections gsm_cleanup_mux() cleans up the gsm by closing all DLCIs, stopping all timers, removing the virtual tty devices and clearing the data queues. This procedure, however, may cause subsequent changes of the virtual modem status lines of a DLCI. More data is being added the outgoing data queue and the deleted kick timer is restarted to handle this. At this point many resources have already been removed by the cleanup procedure. Thus, a kernel panic occurs. Fix this by proving in gsm_modem_update() that the cleanup procedure has not been started and the mux is still alive. Note that writing to a virtual tty is already protected by checks against the DLCI specific connection state.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 92% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected dd37f657387853623f20c1b2482afbb9cd8ece33 – < 81a4dd5e6c78f5d8952fa8c9d36565db1fe01444
- affected c568f7086c6e771c77aad13d727c70ef70e07243 – < df6cfab66ff2a44bd23ad5dd5309cb3421bb6593
- affected c568f7086c6e771c77aad13d727c70ef70e07243 – < 19d34b73234af542cc8a218cf398dee73cdb1890
- affected c568f7086c6e771c77aad13d727c70ef70e07243 – < ce4df90333c4fe65acb8b5089fdfe9b955ce976a
- affected c568f7086c6e771c77aad13d727c70ef70e07243 – < 3a75b205de43365f80a33b98ec9289785da56243
- affected d834aba5f30d9a6f98f4ca1eb07e501f1989331c
- affected 692e847a8e6607909c4a3f98ab16ccee7849bd11
- affected 5.15.61 – < 5.15.138
- affected 5.18.18 – < 5.19
- affected 5.19.2 – < 5.20
- affected 6.0
- unaffected < 6.0
- unaffected 5.15.138 – ≤ 5.15.*
- unaffected 6.1.62 – ≤ 6.1.*
- unaffected 6.5.11 – ≤ 6.5.*
- unaffected 6.6.1 – ≤ 6.6.*
- unaffected 6.7 – ≤ *
References (5)
- https://git.kernel.org/stable/c/81a4dd5e6c78f5d8952fa8c9d36565db1fe01444 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/df6cfab66ff2a44bd23ad5dd5309cb3421bb6593 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/19d34b73234af542cc8a218cf398dee73cdb1890 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/ce4df90333c4fe65acb8b5089fdfe9b955ce976a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/3a75b205de43365f80a33b98ec9289785da56243 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-52872)Record last updated .