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Linux Kernel CVE-2025-71308

| EUVDEUVD-2025-209972 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-05-27 416baaa9-dc9f-4396-8d5f-8c081fb06d67 GHSA-m32w-q6hx-h7w8
Linux 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 vector, low-privilege required to trigger NPU context path; no confidentiality or integrity impact, only kernel availability.

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 25, 2026 - 21:08 vuln.today
CVSS changed
Jun 25, 2026 - 21:07 NVD
5.5 (MEDIUM)
Patch available
May 27, 2026 - 19:46 EUVD
CVE Published
May 27, 2026 - 14:16 nvd
MEDIUM 5.5
CVE Published
May 27, 2026 - 14:16 nvd
UNKNOWN (no severity yet)

DescriptionNVD

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

accel/amdxdna: Fix potential NULL pointer dereference in context cleanup

aie_destroy_context() is invoked during error handling in aie2_create_context(). However, aie_destroy_context() assumes that the context's mailbox channel pointer is non-NULL. If mailbox channel creation fails, the pointer remains NULL and calling aie_destroy_context() can lead to a NULL pointer dereference.

In aie2_create_context(), replace aie_destroy_context() with a function which request firmware to remove the context created previously.

AnalysisAI

NULL pointer dereference in the Linux kernel's accel/amdxdna driver (AMD AI accelerator/NPU subsystem) allows a local low-privileged user to trigger a kernel crash and denial of service. The flaw arises during error-path execution in aie2_create_context(): when mailbox channel creation fails, the channel pointer remains NULL, yet aie_destroy_context() is unconditionally called assuming it is non-NULL. No public exploit code exists and EPSS probability is 0.02%, indicating very low exploitation activity. Vendor-released patches are available in Linux 6.19.4 and the 7.0 series.

Technical ContextAI

The vulnerability resides in the amdxdna kernel module (drivers/accel/amdxdna), which provides kernel-space support for AMD's AI engine (AIE2) accelerator - the NPU present in AMD Ryzen AI-series SoCs. The affected code path manages firmware-backed execution contexts for AI workloads. During context creation (aie2_create_context()), an error branch invokes aie_destroy_context() to roll back partially initialized state; however, this cleanup function unconditionally dereferences the context's mailbox channel pointer without first checking for NULL - a classic CWE-476 (NULL Pointer Dereference) defect. The fix replaces the erroneous cleanup call with a targeted firmware request that removes only the previously committed firmware-side context, safely bypassing the NULL pointer. CPE: cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*.

RemediationAI

The primary fix is to upgrade to Linux kernel 6.19.4 or later (stable patch commit 2611c9616cb52d3ed54a6095d72d18e645a6955a), or to Linux 7.0 or later (stable patch commit 97f27573837ef96b4ba42af463cc800cab615c0e), per the upstream stable tree at https://git.kernel.org/stable/. Distribution maintainers (RHEL, Ubuntu, SUSE, Fedora, Arch) should be monitored for backported SRPMs or package updates incorporating these commits. As a compensating control where patching is not immediately possible, removing or blocklisting the amdxdna kernel module (modprobe -r amdxdna followed by adding it to /etc/modprobe.d/blocklist.conf) prevents the vulnerable code path from executing entirely; the trade-off is loss of AMD NPU/AI accelerator functionality for affected workloads. Restricting local interactive access to the system also limits exposure, since exploitation requires a local shell session.

Same weakness CWE-476 – NULL Pointer Dereference

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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-2025-71308 vulnerability details – vuln.today
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