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CVE-2026-97596

Linux: ipvs: reject invalid states in connection template sync records

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)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in5677e81ffdbfc1c03dcb427fb8b1c38289bed76dAlso 1a8f15911352bb3cf4663aa02049c49c7f30e524, 652d9caa5ac925ab012834e325d77b9ed638d4fc and 3 moreCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 5677e81ffdbfc1c03dcb427fb8b1c38289bed76dLinuxCVE List
  • 1a8f15911352bb3cf4663aa02049c49c7f30e524LinuxCVE List
  • 652d9caa5ac925ab012834e325d77b9ed638d4fcLinuxCVE List
  • 50c3f06222eafe9cca7ca51a0ef83311d7cab353LinuxCVE List
  • 0c61f7d8e18a978aec2a16d9acd5f682f1c72476LinuxCVE List
  • 74cb39735b6cd0aff4b5584158f09376fd97aadfLinuxCVE 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: reject invalid states in connection template sync records

IPVS sync receivers validate protocol states before creating or updating a connection. For connection templates, however, they only log states outside the template state range and still store the value in the connection.

A template can be returned by ordinary connection lookup. TCP and SCTP then use the invalid state as an index into their transition tables.

Reject invalid template states in both sync protocol versions before looking up or modifying a connection. The version 1 path handles both IPv4 and IPv6 records.

Text from CVE List

Affected versions 18

  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before 5677e81ffdbfc1c03dcb427fb8b1c38289bed76dCVE List
  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before d4eb339b442a0ffaa565779b975494a0a0664f18CVE List
  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before 1a8f15911352bb3cf4663aa02049c49c7f30e524CVE List
  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before 652d9caa5ac925ab012834e325d77b9ed638d4fcCVE List
  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before fc10dc4511e6e2e2b4098ee115c8e5639471f23dCVE List
  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before 50c3f06222eafe9cca7ca51a0ef83311d7cab353CVE List
  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before 0c61f7d8e18a978aec2a16d9acd5f682f1c72476CVE List
  • Linuxaffected: 275411430f892407b885be1de2548b2e632892c3 before 74cb39735b6cd0aff4b5584158f09376fd97aadfCVE List
  • Linuxaffected: 4.19CVE List
  • Linuxunaffected: all versions before 4.19CVE 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