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CVE-2026-99142

Linux: tracing: Check operator stack capacity before pushing

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 in75e894f92417390f0ef44fd350f2d3634c784876Fixed versionCVE List
Published28 Oct 2026Updated 28 Oct 2026CVE List

What fixes it

  • 75e894f92417390f0ef44fd350f2d3634c784876LinuxCVE 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:

tracing: Check operator stack capacity before pushing

predicate_parse() uses the first operator stack entry before processing any opening parentheses. A push then increments top before writing. The existing check still permits that write when top already points to the last allocated entry, which can access beyond the operator stack.

Reject the push when top reaches the last allocated entry.

Text from CVE List

Affected versions 8

  • Linuxaffected: 39f7c41c908bc82947ce47cdd021520ff486c53f before a866a8a753922cdf7710b8eb3f686dc0efc06505CVE List
  • Linuxaffected: 39f7c41c908bc82947ce47cdd021520ff486c53f before 75e894f92417390f0ef44fd350f2d3634c784876CVE List
  • Linuxaffected: 39f7c41c908bc82947ce47cdd021520ff486c53f before c47a7b11bcb3d45e29723afcf6336866476b1d08CVE List
  • Linuxaffected: 6.6CVE List
  • Linuxunaffected: all versions before 6.6CVE List
  • Linuxunaffected: 6.18.59 through 6.18.*CVE List
  • Linuxunaffected: 7.2.13 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 3