PT-2025-46644 · Linux+2 · Linux Kernel+2
Published
2025-11-12
·
Updated
2026-05-07
·
CVE-2025-40169
CVSS v2.0
5.0
Medium
| Vector | AV:L/AC:H/Au:S/C:P/I:P/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A flaw exists in the Linux kernel's BPF (Berkeley Packet Filter) program verification process. Specifically, the
check alu op() function inadequately validates the 'offset' field within ALU (Arithmetic Logic Unit) instructions. The initial check allowed negative offset values due to the signed nature of the insn->off variable, potentially leading to the acceptance of malformed BPF programs. The validation has been improved by changing the condition to explicitly reject any value other than 0 or 1 for the offset. This strengthens the verifier against potentially harmful BPF programs.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
RCE
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu