Out-of-bounds read in Linux kernel - CVE-2026-68474

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Main Vulnerability Database Vulnerabilities #VU143602

Out-of-bounds read in Linux kernel - CVE-2026-68474

Published: August 16, 2026


Vulnerability identifier: #VU143602
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-68474
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in spufs_mem_mmap_access() when accessing the SPU local store through a memory-mapped area. A local user can supply a crafted offset and length to read beyond the LS_SIZE buffer and disclose sensitive information.

The issue affects 64-bit systems because the existing clamp does not properly limit access against the local store size.


Affected software

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

How to mitigate CVE-2026-68474

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1112.113, 5.15.0.1112.112
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