Vulnerability CVE-2023-52734

Vulnerability CVE-2023-52734

Published: 2024-05-21

Description:

In the Linux kernel, the following vulnerability has been resolved:

net: sched: sch: Bounds check priority

Nothing was explicitly bounds checking the priority index used to access
clpriop[]. WARN and bail out early if it's pathological. Seen with GCC 13:

../net/sched/sch_htb.c: In function 'htb_activate_prios':
../net/sched/sch_htb.c:437:44: warning: array subscript [0, 31] is outside array bounds of 'struct htb_prio[8]' [-Warray-bounds=]
437 | if (p->inner.clprio[prio].feed.rb_node)
| ~~~~~~~~~~~~~^~
../net/sched/sch_htb.c:131:41: note: while referencing 'clprio'
131 | struct htb_prio clprio[TC_HTB_NUMPRIO];
| ^~~~

References:

https://git.kernel.org/stable/c/fbe71c5dacaa5a9960323215f118958174c81aa0

https://git.kernel.org/stable/c/90fcf55d83b20da1091f926a291af05fb74f61c6

https://git.kernel.org/stable/c/99875ea9b5b47995bfb3c684d21eb17feb4b7e6a

https://git.kernel.org/stable/c/f6415c9c9a0b3881543d38528a58b54af4351522

https://git.kernel.org/stable/c/de5ca4c3852f896cacac2bf259597aab5e17d9e3

Copyright 2026, cxsecurity.com