Out-of-bounds read in Linux kernel - CVE-2026-93055

Vulnerability identifier: #VU150960

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-93055

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause an out-of-bounds read.

The vulnerability exists due to an out-of-bounds read in udf_pc_to_char() when processing malformed UDF symlink data containing a partial pathComponent header. A local user can provide malformed UDF symlink data containing a partial pathComponent header to cause an out-of-bounds read.

Linux kernel
Debian Linux
Ubuntu
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux-azure-fde (Ubuntu package) - update to 5.15.0-1124.133
linux (Ubuntu package) - update to 7.0.0-42.42
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/48b2a74317e15f93983c74a5a07245bc94a00d39
• https://git.kernel.org/stable/c/57371e743398e0d485f0f7beede1ade41f812324
• https://git.kernel.org/stable/c/8da8fd3df9fc14cf79ca3a3978d27ba067985111
• https://git.kernel.org/stable/c/b21cb958292ee1e02eb305ff9de09f2f7edd551a
• https://git.kernel.org/stable/c/d23eb7380d1594cda31a5dc8487dd2a5c8def8c7
• https://git.kernel.org/stable/c/d9f49c8b55debf1512f912077b6c759cc8b6d2e0
• https://git.kernel.org/stable/c/ee264227b656218bc1b257d8e4f83467f5f17723
• https://git.kernel.org/stable/c/f44f5f795f1a56249821a05183347ea025855e31

• Out-of-bounds read in Linux kernel udf
• Debian update for linux
• Ubuntu update for linux-azure-fde
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more