Out-of-bounds write in Linux kernel - CVE-2026-80522
Published: August 27, 2026
Vulnerability identifier: #VU145971
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-80522
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
kernel (Red Hat package)
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
kernel (Red Hat package)
How to mitigate CVE-2026-80522
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
kernel (Red Hat package) - addressed in versions 5.14.0-687.53.1.el9_8, 6.12.0-211.61.1.el10_2
kernel (Red Hat package) - addressed in versions 5.14.0-687.53.1.el9_8, 6.12.0-211.61.1.el10_2