Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: fix reversed sequence option serialization hton_seq() expects the host-order source first and the unaligned network-order destination second. The version 1 sync sender passes these arguments in reverse for both sequence blocks. This leaves 24 bytes of the kmalloc-backed message unwritten. It may disclose stale heap data and replace the live connection sequence state with values read from the buffer. Pass the connection sequence state as the source and the message payload as the destination for both blocks.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/524599714558da83747c04952d378155c69f5b6b Patch
- git.kernel.org/stable/c/677ff8ab30a663cde984d8afe86465fd0d81aeef Patch
- git.kernel.org/stable/c/ae38b2ae16f709c0193e1b4340bde26ef3e2687d Patch
- git.kernel.org/stable/c/b04578b74f2d3755548fe9e829e3b2a6c6f966a1 Patch
- git.kernel.org/stable/c/bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0 Patch
- git.kernel.org/stable/c/de6cc6ec7932bc530f2bb92005dac9123d50659c Patch
- git.kernel.org/stable/c/e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec Patch
- git.kernel.org/stable/c/f487b5788f15c6c32a219ed1480d25c93fc18d30 Patch
Metrics
- CVSS 3.1
-
4.4
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L - EPSS — exploit probability
- 0% percentile: 5 · as of 9 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.