CVE-2026-98078 PUBLISHED

ipvs: fix reversed sequence option serialization

Assigner: Linux
Reserved: 25.09.2026 Published: 25.09.2026 Updated: 25.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 986a075795339c5ea1122ce9290dfd5504252eb0 to e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec (excl.)
  • affected from 986a075795339c5ea1122ce9290dfd5504252eb0 to 524599714558da83747c04952d378155c69f5b6b (excl.)
  • affected from 986a075795339c5ea1122ce9290dfd5504252eb0 to de6cc6ec7932bc530f2bb92005dac9123d50659c (excl.)
  • affected from 986a075795339c5ea1122ce9290dfd5504252eb0 to b04578b74f2d3755548fe9e829e3b2a6c6f966a1 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 2.6.39 is affected
  • unaffected from 0 to 2.6.39 (excl.)
  • unaffected from 6.12.111 to 6.12.* (incl.)
  • unaffected from 6.18.53 to 6.18.* (incl.)
  • unaffected from 7.2.7 to 7.2.* (incl.)
  • unaffected from 7.3-rc3 to * (incl.)

References