Use of uninitialized resource in Linux kernel - CVE-2026-23007

Vulnerability identifier: #VU122030

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-2026-23007

CWE-ID: CWE-908

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to use of uninitialized resource within the bio_integrity_prep() function in block/bio-integrity-auto.c. A local user can perform a denial of service (DoS) attack.

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
Ubuntu
kernel (Red Hat package)
kernel-devel (Red Hat package)
kernel-64k-devel-matched (Red Hat package)
kernel-64k-devel (Red Hat package)
kernel-64k-debug-devel-matched (Red Hat package)
kernel-64k-debug-devel (Red Hat package)
kernel-zfcpdump-devel-matched (Red Hat package)
kernel-zfcpdump-devel (Red Hat package)
python3-perf (Red Hat package)
perf (Red Hat package)
kernel-headers (Red Hat package)
kernel-devel-matched (Red Hat package)
kernel-debug-devel-matched (Red Hat package)
kernel-debug-devel (Red Hat package)
linux-azure-fde-6.17 (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)

Install update from vendor's repository.

kernel (Red Hat package) - update to 5.14.0-687.51.1.el9_8
kernel-devel (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-64k-devel-matched (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-64k-devel (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-64k-debug-devel-matched (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-64k-debug-devel (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-zfcpdump-devel-matched (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-zfcpdump-devel (Red Hat package) - update to 6.12.0-211.59.1.el10_2
python3-perf (Red Hat package) - update to 6.12.0-211.59.1.el10_2
perf (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-headers (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-devel-matched (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-debug-devel-matched (Red Hat package) - update to 6.12.0-211.59.1.el10_2
kernel-debug-devel (Red Hat package) - update to 6.12.0-211.59.1.el10_2
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1018.20~24.04.1, 6.17.0-1021.24~24.04.1
linux-oracle-6.17 (Ubuntu package) - addressed in versions 6.17.0-1019.19~24.04.3, 6.17.0-1019.19~24.04.3+1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1030.30
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1031.31

• https://git.kernel.org/stable/c/ca22c566b89164f6e670af56ecc45f47ef3df819
• https://git.kernel.org/stable/c/d6072557b90e0c557df319a56f4a9dc482706d2c

• Use of uninitialized resource in Linux kernel block
• Ubuntu update for linux-gcp-6.17
• Ubuntu update for linux-oem-6.17
• Ubuntu update for linux-azure-fde-6.17
• Ubuntu update for linux-azure-6.17
• Ubuntu update for linux-oracle-6.17
• Ubuntu update for linux-nvidia-6.17
• Red Hat Enterprise Linux 9 update for kernel
• Red Hat Enterprise Linux 10 update for kernel