Out-of-bounds read in Linux kernel - CVE-2026-72444

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU142993

Out-of-bounds read in Linux kernel - CVE-2026-72444

Published: August 15, 2026


Vulnerability identifier: #VU142993
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72444
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to disclose uninitialized memory contents.

The vulnerability exists due to an out-of-bounds read in __skb_flow_dissect() when processing packets on non-ethernet devices with flow dissector ethernet address matching enabled. A local user can send a crafted packet through AF_PACKET to disclose uninitialized memory contents.

Exploitation requires a TUN device in L3 mode together with a multiq qdisc and a flower filter matching on eth_src.


Affected software

Linux kernel
Ubuntu
linux-gcp-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)

How to mitigate CVE-2026-72444

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1

External References

Related Security Bulletins