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CVE-2026-98873

Linux: netfilter: nf_conntrack_expect: zero at allocation time

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)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in39cb6ff947c16a576ea68c5f272e634acdcb0085Also 90545aa07a183887e9d72ce573c18e08f62e2c91, 9c11d7ea5ff4dbe162e79f00188814ef5483c295 and 8 moreCVE List
Published23 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

  • 39cb6ff947c16a576ea68c5f272e634acdcb0085LinuxCVE List
  • 90545aa07a183887e9d72ce573c18e08f62e2c91LinuxCVE List
  • 9c11d7ea5ff4dbe162e79f00188814ef5483c295LinuxCVE List
  • 824397af7bfe14edad374c64253dae0187ca623dLinuxCVE List
  • 241ccd2fed9051db443aadce248fc0ab30f55e97LinuxCVE List
  • 5.10.271LinuxCVE List
Show all 11 fixed versions

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:

netfilter: nf_conntrack_expect: zero at allocation time

There are occasional LLM hints wrt. leaking uninitialized data to userspace via ctnetlink. Just zero at allocation time, expectations are not frequently used these days.

Intentionally keeps _init as-is because we could theoretically support re-init, so add the missing exp->dir there.

Text from CVE List

Affected versions 20

  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 39cb6ff947c16a576ea68c5f272e634acdcb0085CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 90545aa07a183887e9d72ce573c18e08f62e2c91CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9c11d7ea5ff4dbe162e79f00188814ef5483c295CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b7f3ee925aee9f1f547d539bc03c35433c238958CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 824397af7bfe14edad374c64253dae0187ca623dCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a39ecb856514274c80d0fac4d128dba6b266a8edCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 241ccd2fed9051db443aadce248fc0ab30f55e97CVE List
  • Linuxaffected: all versions before 5.10.271CVE List
  • Linuxaffected: all versions before 5.15.222CVE List
  • Linuxaffected: all versions before 6.1.189CVE List
  • Linuxaffected: all versions before 6.6.158CVE List
  • Linuxaffected: all versions before 6.12.111CVE List
  • Linuxaffected: all versions before 6.18.53CVE 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: 7.2CVE List

References 7