Skip to main content

Linux Kernel EUVDEUVD-2026-27697

| CVE-2026-43135 MEDIUM
2026-05-06 Linux GHSA-c4q3-46pg-rxhc
5.5
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
4.7 MEDIUM

AC raised to H because exploitation requires non-default hardware (Conexant cx23885 PCI card); PR:L and AV:L confirmed by local-only access; no confidentiality or integrity impact.

3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
5.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Analysis Generated
Jul 24, 2026 - 01:11 vuln.today
CVSS changed
May 12, 2026 - 21:22 NVD
5.5 (MEDIUM)
Patch available
May 06, 2026 - 13:32 EUVD
CVE Published
May 06, 2026 - 11:27 nvd
MEDIUM 5.5

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

media: cx23885: Add missing unmap in snd_cx23885_hw_params()

In error path, add cx23885_alsa_dma_unmap() to release the resource acquired by cx23885_alsa_dma_map().

AnalysisAI

Resource leak in the Linux kernel cx23885 media driver's ALSA interface causes local denial of service on systems with Conexant 23885 PCI TV tuner hardware. The snd_cx23885_hw_params() function fails to call cx23885_alsa_dma_unmap() in its error path, leaving DMA resources allocated by cx23885_alsa_dma_map() unreleased. A low-privileged local attacker on an affected system can repeatedly trigger the error path to exhaust DMA resources, crashing the kernel subsystem. No public exploit exists and EPSS is 0.02% (7th percentile), reflecting extremely low real-world exploitation probability.

Technical ContextAI

The cx23885 driver supports Conexant 23885-based PCI TV tuner capture cards and exposes audio through the Advanced Linux Sound Architecture (ALSA) interface. The vulnerability resides in snd_cx23885_hw_params(), the callback invoked during ALSA hardware parameter configuration. When this function fails mid-execution, it must release any resources already acquired - in this case, DMA-mapped memory set up by cx23885_alsa_dma_map(). The missing call to cx23885_alsa_dma_unmap() in the error path is a classic error-path resource leak (analogous to CWE-772: Missing Release of Resource after Effective Lifetime, though CWE is listed as N/A in the NVD entry). The CPE data confirms this is specifically the Linux kernel (cpe:2.3:a:linux:linux). The vulnerability was introduced at commit 9529a4b0cf49163e489446ec159a2dfb64f78df8 and has been patched across all active stable kernel branches.

RemediationAI

Update the Linux kernel to one of the patched stable releases: 5.10.252 or later (fix commit fc4df593a8ff), 5.15.202 or later (fix commit 0b7f56084cc3), 6.1.165 or later (fix commit fda46c9025b7), 6.6.128 or later (fix commit 505630dd1ebf), 6.12.75 or later (fix commit 9c0a6ff53866), 6.18.16 or later (fix commit 141c81849fab), 6.19.6 or later (fix commit 9544b73cad4e), or any 7.0+ release (fix commit 544215cc37d0). Upstream stable patches are available at the git.kernel.org references listed above. Ubuntu users should apply USN-8492-1. As a compensating control for systems that cannot be patched immediately, blacklisting the cx23885 kernel module (echo 'blacklist cx23885' >> /etc/modprobe.d/blacklist.conf) prevents the driver from loading entirely, eliminating the attack surface - the trade-off being loss of cx23885 hardware functionality. No confidentiality or integrity impact means there is no urgency to apply out-of-band patches outside normal patch cycles.

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed

Share

EUVD-2026-27697 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy