SB2026072094 - Out-of-bounds read in Linux kernel core

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64124)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in net_devmem_bind_dmabuf() and related devmem indexing logic when processing a dma-buf bind request with a non-page-aligned size or scatter-gather length. A local user can provide a crafted dma-buf to trigger out-of-bounds access and cause a denial of service.

The non-page-aligned size condition affects TX handling, while the scatter-gather length condition affects both RX and TX.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/134c517dfa63203287b2aad6558017f42435a02e
• https://git.kernel.org/stable/c/4eb82ba543421e9e38cc14e4e82058b78850df50
• https://git.kernel.org/stable/c/d5008e4e4ee6b739256b796702a7d1aae1b5c3b4