CVE-2024-40966tty: add the option to have a tty reject a new ldisc
- 5.5MediumCVSS base score
- 0.29%Exploitation in 30 daysEPSS · top 78% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: tty: add the option to have a tty reject a new ldisc ... and use it to limit the virtual terminals to just N_TTY. They are kind of special, and in particular, the "con_write()" routine violates the "writes cannot sleep" rule that some ldiscs rely on. This avoids the BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659 when N_GSM has been attached to a virtual console, and gsmld_write() calls con_write() while holding a spinlock, and con_write() then tries to get the console lock.
Timeline
ID reserved
By Linux
Published
- 22 months later
· 22 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (12 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: Medium 5.5.
Affected products
- affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 3c6332f3bb1578b5b10ac2561247b1d6272ae937
- affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 287b569a5b914903ba7c438a3c0dbc3410ebb409
- affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 5920ac19964f9e20181f63b410d9200ddbf8dc86
- affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 – < 6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b
- affected 2.6.35
- unaffected < 2.6.35
- unaffected 6.1.96 – ≤ 6.1.*
- unaffected 6.6.36 – ≤ 6.6.*
- unaffected 6.9.7 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References5
- https://git.kernel.org/stable/c/3c6332f3bb1578b5b10ac2561247b1d6272ae937 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/287b569a5b914903ba7c438a3c0dbc3410ebb409 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/5920ac19964f9e20181f63b410d9200ddbf8dc86 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
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)
- EUVD EUVD-2024-38763 (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://cveledger.app/cve/CVE-2024-40966)Record last updated .