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CVE-2026-98078

Linux: ipvs: fix reversed sequence option serialization

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.15%Chance of exploitation activity in the next 30 days, higher than 3% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in677ff8ab30a663cde984d8afe86465fd0d81aeefAlso 524599714558da83747c04952d378155c69f5b6bCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 677ff8ab30a663cde984d8afe86465fd0d81aeefLinuxCVE List
  • 524599714558da83747c04952d378155c69f5b6bLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 18

  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before ae38b2ae16f709c0193e1b4340bde26ef3e2687dCVE List
  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0CVE List
  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before f487b5788f15c6c32a219ed1480d25c93fc18d30CVE List
  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before 677ff8ab30a663cde984d8afe86465fd0d81aeefCVE List
  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ecCVE List
  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before 524599714558da83747c04952d378155c69f5b6bCVE List
  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before de6cc6ec7932bc530f2bb92005dac9123d50659cCVE List
  • Linuxaffected: 986a075795339c5ea1122ce9290dfd5504252eb0 before b04578b74f2d3755548fe9e829e3b2a6c6f966a1CVE List
  • Linuxaffected: 2.6.39CVE List
  • Linuxunaffected: all versions before 2.6.39CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.7 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 8