Incorrect Conversion between Numeric Types in Linux kernel - CVE-2026-93127
Published: September 18, 2026
Vulnerability identifier: #VU150879
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93127
CWE-ID: CWE-681
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause an out-of-bounds access.
The vulnerability exists due to improper scalar identifier handling in the BPF verifier when processing sign-extending narrowing fills from spilled scalar stack slots. A local user can load a BPF program that combines sign-extending and zero-extending fills of the same stack slot to cause an out-of-bounds access.
Affected software
Linux kernel
How to mitigate CVE-2026-93127
Install security update from vendor's repository.