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Linux Kernel CVE-2026-43480

| EUVDEUVD-2026-30016 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-05-13 Linux GHSA-c9x8-fmgr-c724
Linux Amd Denial Of Service Null Pointer Dereference Red Hat Suse
5.5
CVSS 3.1 · NVD
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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
5.5 MEDIUM

Local access with low privileges required to trigger driver initialization; impact is purely a kernel panic with no confidentiality or integrity consequence.

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

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jun 26, 2026 - 22:32 vuln.today
CVSS changed
Jun 26, 2026 - 20:22 NVD
5.5 (MEDIUM)
Patch available
May 13, 2026 - 16:33 EUVD
CVE Published
May 13, 2026 - 15:08 nvd
MEDIUM 5.5
CVE Published
May 13, 2026 - 15:08 nvd
UNKNOWN (no severity yet)

DescriptionNVD

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

ASoC: amd: acp3x-rt5682-max9836: Add missing error check for clock acquisition

The acp3x_5682_init() function did not check the return value of clk_get(), which could lead to dereferencing error pointers in rt5682_clk_enable().

Fix this by:

  1. Changing clk_get() to the device-managed devm_clk_get().
  2. Adding proper IS_ERR() checks for both clock acquisitions.

AnalysisAI

Null pointer dereference in the Linux kernel's AMD ASoC ACP3x audio driver (acp3x-rt5682-max9836) allows a local low-privileged user on affected hardware to crash the kernel. The flaw originates in acp3x_5682_init(), which failed to validate the return value of clk_get() before passing it to rt5682_clk_enable(), meaning an error pointer could be dereferenced directly. No public exploit identified at time of analysis and the EPSS score of 0.02% (7th percentile) reflects extremely low exploitation interest; this vulnerability is not listed in the CISA KEV catalog.

Technical ContextAI

The affected component is the ALSA System on Chip (ASoC) driver for AMD's ACP3x (Audio CoProcessor) found in select AMD-based SoCs, paired with the Realtek RT5682 audio codec and Maxim MAX9836 amplifier. The Linux clock subsystem's clk_get() returns an ERR_PTR on failure rather than NULL, requiring callers to use IS_ERR() before dereferencing. The acp3x_5682_init() function skipped this check entirely, so a failed clock acquisition would pass an error pointer into rt5682_clk_enable(), triggering a kernel panic. CWE-476 (NULL Pointer Dereference) accurately captures this class of error. The fix replaces clk_get() with the device-managed devm_clk_get() and adds IS_ERR() guards for both clock acquisitions, ensuring proper error propagation. The CPE cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:* confirms the affected product is the upstream Linux kernel.

RemediationAI

Upgrade to a patched Linux kernel version: 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9, or 7.0, as applicable to the deployed stable branch. Patches are available from the Linux stable kernel trees at https://git.kernel.org/stable/. For systems where an immediate kernel upgrade is not feasible, a compensating control is to blacklist the snd-acp3x-5682 kernel module (e.g., echo 'blacklist snd-acp3x-5682' >> /etc/modprobe.d/blacklist.conf) to prevent the vulnerable driver from loading; the trade-off is loss of audio functionality on AMD ACP3x hardware. Given the local-only, DoS-only nature of this flaw, organizations should prioritize this fix as part of routine kernel maintenance rather than emergency patching.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Not-Affected

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CVE-2026-43480 vulnerability details – vuln.today
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