CVE-2024-40966
tty: add the option to have a tty reject a new ldisc
At a glance
- Severity
- Not available
- EPSS
- EPSS 0.29 % · percentile 21 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2024-38763
- GCVE · GCVE-0-2024-40966
CERT-FR advisories
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0899 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0002 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0823 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0799 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0778 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0717 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0693 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0669 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0613 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*< 6.1.96cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.36cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.9.7
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 < 3c6332f3bb1578b5b10ac2561247b1d6272ae937 ; affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 < 287b569a5b914903ba7c438a3c0dbc3410ebb409 ; affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 < 5920ac19964f9e20181f63b410d9200ddbf8dc86 ; affected e1eaea46bb4020b38a141b84f88565d4603f8dd0 < 6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b |
| Linux · Linux | affected 2.6.35 ; unaffected 0 < 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
- https://git.kernel.org/stable/c/3c6332f3bb1578b5b10ac2561247b1d6272ae937
- https://git.kernel.org/stable/c/287b569a5b914903ba7c438a3c0dbc3410ebb409
- https://git.kernel.org/stable/c/5920ac19964f9e20181f63b410d9200ddbf8dc86
- https://git.kernel.org/stable/c/6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |