| Name | CVE-2015-4170 |
| Description | Race condition in the ldsem_cmpxchg function in drivers/tty/tty_ldsem.c in the Linux kernel before 3.13-rc4-next-20131218 allows local users to cause a denial of service (ldsem_down_read and ldsem_down_write deadlock) by establishing a new tty thread during shutdown of a previous tty thread. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | fixed |
| stretch (security) | 4.9.320-2 | fixed |
| stretch (lts), stretch | 4.9.320-3 | fixed |
| buster | 4.19.249-2 | fixed |
| buster (security) | 4.19.304-1 | fixed |
| bullseye | 5.10.209-2 | fixed |
| bullseye (security) | 5.10.205-2 | fixed |
| bookworm | 6.1.76-1 | fixed |
| bookworm (security) | 6.1.85-1 | fixed |
| trixie | 6.6.15-2 | fixed |
| sid | 6.7.9-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| linux | source | wheezy | (not affected) | | | |
| linux | source | (unstable) | 3.13.4-1 | | | |
| linux-2.6 | source | (unstable) | (not affected) | | | |
Notes
[wheezy] - linux <not-affected> (commit 4898e640caf03fdbaf2122d5a33949bf3e4a5b34 not backported)
- linux-2.6 <not-affected> (commit 4898e640caf03fdbaf2122d5a33949bf3e4a5b34 not backported)
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203ae (v3.13-rc5)
Affected code was introduced by the rewrite in https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4898e640caf03fdbaf2122d5a33949bf3e4a5b34 (v3.11-rc1)
https://www.openwall.com/lists/oss-security/2015/05/26/1