Release of invalid pointer or reference in Linux kernel - CVE-2026-45959

Vulnerability identifier: #VU132532

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-2026-45959

CWE-ID: CWE-763

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to invalid free in the ccp crypto component when performing cleanup of a local pointer annotated with __cleanup(kfree). A local attacker can trigger the vulnerable code path to cause a denial of service.

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)
kernel-64k-devel-matched (Red Hat package)
python3-perf (Red Hat package)
kernel-64k-devel (Red Hat package)
kernel-64k-debuginfo (Red Hat package)
kernel-64k-debug-devel-matched (Red Hat package)
kernel-64k-debug-devel (Red Hat package)
kernel-debuginfo-common-ppc64le (Red Hat package)
kernel-zfcpdump-modules-extra (Red Hat package)
kernel-zfcpdump-modules-core (Red Hat package)
kernel-zfcpdump-modules (Red Hat package)
kernel-zfcpdump-devel-matched (Red Hat package)
kernel-zfcpdump-devel (Red Hat package)
kernel-zfcpdump-core (Red Hat package)
kernel-zfcpdump (Red Hat package)
kernel-debuginfo-common-s390x (Red Hat package)
rv (Red Hat package)
rtla (Red Hat package)
perf (Red Hat package)
kernel-rt-64k-debug-modules-extra (Red Hat package)
libperf (Red Hat package)
kernel-tools-libs-devel (Red Hat package)
kernel-cross-headers (Red Hat package)
kernel-rt-64k-modules-extra (Red Hat package)
kernel-rt-64k-modules-core (Red Hat package)
kernel-rt-64k-modules (Red Hat package)
kernel-rt-64k-devel (Red Hat package)
kernel-rt-64k-debuginfo (Red Hat package)
kernel-debuginfo-common-aarch64 (Red Hat package)
kernel-rt-64k-debug-modules-core (Red Hat package)
kernel-rt-64k-debug-modules (Red Hat package)
kernel-rt-64k-debug-devel (Red Hat package)
kernel-rt-64k-debug-debuginfo (Red Hat package)
kernel-rt-64k-debug-core (Red Hat package)
kernel-rt-64k-debug (Red Hat package)
kernel-rt-64k-core (Red Hat package)
kernel-rt-64k (Red Hat package)
kernel-debuginfo (Red Hat package)
kernel-rt (Red Hat package)
kernel-modules-extra-matched (Red Hat package)
kernel-modules-extra (Red Hat package)
kernel-modules-core (Red Hat package)
kernel-modules (Red Hat package)
kernel-headers (Red Hat package)
kernel-devel-matched (Red Hat package)
kernel-devel (Red Hat package)
kernel-debuginfo-common-x86_64 (Red Hat package)
kernel-rt-core (Red Hat package)
kernel-debug-uki-virt (Red Hat package)
kernel-debug-modules-extra (Red Hat package)
kernel-debug-modules-core (Red Hat package)
kernel-debug-modules (Red Hat package)
kernel-debug-devel-matched (Red Hat package)
kernel-debug-devel (Red Hat package)
kernel-debug-debuginfo (Red Hat package)
kernel-debug-core (Red Hat package)
kernel-rt-devel (Red Hat package)
kernel-uki-virt-addons (Red Hat package)
kernel-uki-virt (Red Hat package)
kernel-tools-libs (Red Hat package)
kernel-tools-debuginfo (Red Hat package)
kernel-tools (Red Hat package)
kernel-rt-modules-extra (Red Hat package)
kernel-rt-modules-core (Red Hat package)
kernel-rt-modules (Red Hat package)
kernel-debug (Red Hat package)
kernel-rt-debuginfo (Red Hat package)
kernel-rt-debug-modules-extra (Red Hat package)
kernel-rt-debug-modules-core (Red Hat package)
kernel-rt-debug-modules (Red Hat package)
kernel-rt-debug-devel (Red Hat package)
kernel-rt-debug-debuginfo (Red Hat package)
kernel-rt-debug-core (Red Hat package)
kernel-rt-debug (Red Hat package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel (Red Hat package) - update to 5.14.0-687.50.1.el9_8
kernel-64k-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
python3-perf (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-debug-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-ppc64le (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-s390x (Red Hat package) - update to 6.12.0-211.58.1.el10_2
rv (Red Hat package) - update to 6.12.0-211.58.1.el10_2
rtla (Red Hat package) - update to 6.12.0-211.58.1.el10_2
perf (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
libperf (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools-libs-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-cross-headers (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-aarch64 (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules-extra-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-headers (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-x86_64 (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-uki-virt (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-uki-virt-addons (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-uki-virt (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools-libs (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug (Red Hat package) - update to 6.12.0-211.58.1.el10_2

• https://git.kernel.org/stable/c/90f9090e3e744a8fe3bb6fa0e61f577347728b0b
• https://git.kernel.org/stable/c/9a3ace9b010ffd8c422c97844ae152f7c53d6b18
• https://git.kernel.org/stable/c/d5abcc33ee76bc26d58b39dc1a097e43a99dd438

• Release of invalid pointer or reference in Linux kernel crypto ccp driver
• Red Hat Enterprise Linux 10 update for kernel
• Red Hat Enterprise Linux 9 update for kernel