PT-2025-37207 · Linux+4 · Linux Kernel+4

Syzbot

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Published

2025-07-11

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Updated

2026-04-20

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CVE-2025-39748

CVSS v3.1

5.5

Medium

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)
Description: The Linux kernel contains a flaw in the BPF (Berkeley Packet Filter) subsystem related to range refinement after a JSET instruction. A kernel warning can occur due to a range invariant violation on a BPF program, specifically when refining the register bounds after a JSET instruction. This issue arises because the verifier walks all branches, leading to inconsistent bounds on an unreachable path. The problem is triggered when refining register bounds using a second condition after a JSET instruction.
Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-478

Related Identifiers

AZL-67208
AZL-70819
BDU:2026-01375
CVE-2025-39748
ECHO-0AC8-B3D6-F939
OPENSUSE-SU-2025:20081-1
SUSE-SU-2025:21074-1
SUSE-SU-2025:21139-1
SUSE-SU-2025:21179-1
SUSE-SU-2026:0962-1
SUSE-SU-2026:1078-1
SUSE-SU-2026:1081-1
SUSE-SU-2026:20667-1
SUSE-SU-2026:20720-1
SUSE-SU-2026:20845-1
SUSE-SU-2026:20876-1
USN-8028-1
USN-8028-2
USN-8028-3
USN-8028-4
USN-8028-5
USN-8028-6
USN-8028-7
USN-8028-8
USN-8031-1
USN-8031-2
USN-8031-3
USN-8052-1
USN-8052-2
USN-8074-1
USN-8074-2
USN-8126-1

Affected Products

Debian
Linuxmint
Linux Kernel
Suse
Ubuntu