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.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 3c6332f3bb1578b5b10ac2561247b1d6272ae937; >= e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 287b569a5b914903ba7c438a3c0dbc3410ebb409; >= e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 5920ac19964f9e20181f63b410d9200ddbf8dc86; >= e1eaea46bb4020b38a141b84f88565d4603f8dd0, < 6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b |
| Linux | Linux | 2.6.35 |
References
- https://git.kernel.org/stable/c/287b569a5b914903ba7c438a3c0dbc3410ebb409Patch
- https://git.kernel.org/stable/c/3c6332f3bb1578b5b10ac2561247b1d6272ae937Patch
- https://git.kernel.org/stable/c/5920ac19964f9e20181f63b410d9200ddbf8dc86Patch
- https://git.kernel.org/stable/c/6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59bPatch
- https://git.kernel.org/stable/c/287b569a5b914903ba7c438a3c0dbc3410ebb409Patch
- https://git.kernel.org/stable/c/3c6332f3bb1578b5b10ac2561247b1d6272ae937Patch
- https://git.kernel.org/stable/c/5920ac19964f9e20181f63b410d9200ddbf8dc86Patch
- https://git.kernel.org/stable/c/6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59bPatch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Timeline
- Published
- Jul 12, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Modified