SB20260827117 - Out-of-bounds write in Linux kernel crypto tegra driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-80522)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to execute arbitrary code or cause a denial of service.

The vulnerability exists due to an out-of-bounds write in tegra_gcm_do_one_req() when processing a decrypt operation without a prior call to tegra_gcm_setauthsize(). A local user can trigger a decrypt operation with an incorrect cryptlen calculation to execute arbitrary code or cause a denial of service.

The issue occurs when ctx->authsize remains zero, causing req->cryptlen to be adjusted using the wrong authentication size value.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/360f2974fcea49c61f6d6f81554741a9eeee7168
• https://git.kernel.org/stable/c/99a18e1d979e0fad3aaf9c65ae6696897c1d9869
• https://git.kernel.org/stable/c/c6237834d9994de209cb90c7a2c461247bce8e90
• https://git.kernel.org/stable/c/cd6991001bf0681ed0bcf21f9cc3d261d749b2bb