Double free in Linux kernel - CVE-2026-74545

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Main Vulnerability Database Vulnerabilities #VU143243

Double free in Linux kernel - CVE-2026-74545

Published: August 16, 2026


Vulnerability identifier: #VU143243
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74545
CWE-ID: CWE-415
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 double free in rtase_start_xmit() in the rtase network driver when handling a DMA mapping failure after fragment buffers have been mapped. A local user can trigger transmission of a packet with fragments to cause a denial of service.


Affected software

Linux kernel
Debian Linux
linux (Debian package)

How to mitigate CVE-2026-74545

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1

External References

Related Security Bulletins