Out-of-bounds read in Linux kernel - CVE-2026-80591

Vulnerability identifier: #VU146296

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-2026-80591

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to an out-of-bounds read in f2fs_listxattr() when processing corrupted xattr entries. A local user can supply a crafted corrupted filesystem image to cause a denial of service.

The issue occurs when an xattr entry lies outside the valid xattr storage area.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oracle-7.0 (Ubuntu package)
linux-azure (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-nvidia-7.0 (Ubuntu package)
linux-raspi (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

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, 7.0.0-1018.18
linux (Ubuntu package) - addressed in versions 7.0.0-31.31~24.04.1, 7.0.0-31.31, 7.0.0-31.31.1, 7.0.0-1006.7, 7.0.0-1011.11~24.04.1, 7.0.0-1012.12~24.04.1, 7.0.0-1012.12
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1011.11, 7.0.0-1014.14
linux-ibm (Ubuntu package) - update to 7.0.0-1013.13
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1013.13
linux-azure-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1
linux-nvidia-7.0 (Ubuntu package) - update to 7.0.0-1018.18~24.04.1
linux-raspi (Ubuntu package) - update to 7.0.0-1019.19
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2018.18

• https://git.kernel.org/stable/c/2770041f34b52334ea63351ffb1cc2007a9de46e
• https://git.kernel.org/stable/c/3c0dbfecd859fd02fe9008f33a83146102ccd9ba
• https://git.kernel.org/stable/c/5ef5bc304f23c3fe255d4936472378dcb74d0e94
• https://git.kernel.org/stable/c/7dd01f7d0291583e3e5420c95c7d584e114899bd
• https://git.kernel.org/stable/c/7dfac47e4189692f35230f3064acf2540e6d75fe
• https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f
• https://git.kernel.org/stable/c/dfa4891c27bccbd83d511a065721e85621f275a1
• https://git.kernel.org/stable/c/ec9f79c8d5b28a928e65b67cd138c841571cf502

• Out-of-bounds read in Linux kernel f2fs
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-oracle-7.0
• Ubuntu update for linux-azure
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-ibm
• Ubuntu update for linux-raspi
• Ubuntu update for linux-nvidia-7.0
• Ubuntu update for linux-nvidia