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CVE-2026-97998

Linux: netfilter: nfnetlink_log: cope with concurrent instance destruction

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 in042465e7d3d3127e21f04e42c1639e2518b98915Also 291685fc8d2e4cf75ed3a23c810883653f407f46, 3161186a2ff81288e9a5f35daf1911153764ecae and 3 moreCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 042465e7d3d3127e21f04e42c1639e2518b98915LinuxCVE List
  • 291685fc8d2e4cf75ed3a23c810883653f407f46LinuxCVE List
  • 3161186a2ff81288e9a5f35daf1911153764ecaeLinuxCVE List
  • 0234d7ca0317be0a623300e1693cd794bbfdf8afLinuxCVE List
  • 1a7a8ac9a9f0ad0d410c901cb6f233833518844cLinuxCVE List
  • 387d744fa7e499d2c3748a4e60e02ebb24e7fb16LinuxCVE 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:

netfilter: nfnetlink_log: cope with concurrent instance destruction

Instances are refcounted. However, only memory release happens on the 1 -> 0 transition; the unlink from hashes can occur with any refcount.

Uncooperative userspace can force a situation where a queue is pending for destruction from netlink event while a different socket with same portid processes an UNBIND request.

With right timing, this will unhash the instance again:

Oops: general protection fault, [..] Call Trace: <TASK> nfulnl_recv_config+0x31a/0xd50 nfnetlink_rcv_msg+0x7c2/0xeb0

Text from CVE List

Affected versions 18

  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before c5c89beaa628d6ac527c6eb2e01b2b52eb417f59CVE List
  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before 042465e7d3d3127e21f04e42c1639e2518b98915CVE List
  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before 291685fc8d2e4cf75ed3a23c810883653f407f46CVE List
  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before 3161186a2ff81288e9a5f35daf1911153764ecaeCVE List
  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before 0234d7ca0317be0a623300e1693cd794bbfdf8afCVE List
  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before 1a7a8ac9a9f0ad0d410c901cb6f233833518844cCVE List
  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before e2dd0f1f8c4e6334699ea6382e52f6da0c7e45ebCVE List
  • Linuxaffected: 0597f2680d666a3bcf101ac0c771ba7e50016bbd before 387d744fa7e499d2c3748a4e60e02ebb24e7fb16CVE List
  • Linuxaffected: 2.6.14CVE List
  • Linuxunaffected: all versions before 2.6.14CVE 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