Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-98085
Published: September 28, 2026
Vulnerability identifier: #VU152365
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98085
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of an implicit subprogram exit edge in the BPF verifier's backtrack_insn() function when verifying BPF_LD | BPF_{IND,ABS} instructions. A local user can submit crafted BPF instructions for verification to cause a denial of service.
These instructions are modeled as fallthrough and implicit subprogram exit branches.
Affected software
Linux kernel
How to mitigate CVE-2026-98085
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3