Improper handling of exceptional conditions in Linux kernel - CVE-2026-64170

Vulnerability identifier: #VU138451

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-2026-64170

CWE-ID: CWE-755

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 improper handling of error pointers in the spi-qup DMA initialization logic when handling DMA setup failures during driver probe. A local user can trigger a DMA setup failure and subsequent probe error or driver unbind to cause a denial of service.

The issue can lead to dereferencing an error pointer or attempting to release a DMA channel a second time.

Linux kernel
openEuler
Ubuntu
kernel-debuginfo
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
bpftool-debuginfo
bpftool
kernel
python3-perf
python3-perf-debuginfo
linux-ibm (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-debuginfo - update to 5.10.0-327.0.0.228
perf-debuginfo - update to 5.10.0-327.0.0.228
perf - update to 5.10.0-327.0.0.228
kernel-tools-devel - update to 5.10.0-327.0.0.228
kernel-tools-debuginfo - update to 5.10.0-327.0.0.228
kernel-tools - update to 5.10.0-327.0.0.228
kernel-source - update to 5.10.0-327.0.0.228
kernel-headers - update to 5.10.0-327.0.0.228
kernel-devel - update to 5.10.0-327.0.0.228
kernel-debugsource - update to 5.10.0-327.0.0.228
bpftool-debuginfo - update to 5.10.0-327.0.0.228
bpftool - update to 5.10.0-327.0.0.228
kernel - update to 5.10.0-327.0.0.228
python3-perf - update to 5.10.0-327.0.0.228
python3-perf-debuginfo - update to 5.10.0-327.0.0.228
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-aws (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1015.15
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-nvidia (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

• https://git.kernel.org/stable/c/0bb3bd442f0bdad3932739a61dd6c580c9c1955e
• https://git.kernel.org/stable/c/45760b72e84c1a1498f1a8a9047184c85299da20
• https://git.kernel.org/stable/c/4bb4764f2c51f03f657a28029eb0595d8223aab5
• https://git.kernel.org/stable/c/4f4051e9d644c371c50de4a042b85bba6727d5c3
• https://git.kernel.org/stable/c/8f9b61d255b1e989b8913b06c8ebe0aba5e1b238
• https://git.kernel.org/stable/c/9e673affb92c29d9ba879bf4ea81c5e840166b56
• https://git.kernel.org/stable/c/a7e8f3efd50a165ba0189f6dc57f7e51a7d149db
• https://git.kernel.org/stable/c/d577c55d189e7ae150973058d13e299b6855633f

• Improper handling of exceptional conditions in Linux kernel spi driver
• Ubuntu update for linux-ibm
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• openEuler 22.03 LTS SP4 update for kernel
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-nvidia