CVE-2025-23155 Affecting kernel-coco-devel package, versions <6.4.0-15061.28.coco15sp6.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-SLES156-KERNELCOCODEVEL-12097392
  • published21 Aug 2025
  • disclosed20 Aug 2025

Introduced: 20 Aug 2025

CVE-2025-23155  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 kernel-coco-devel to version 6.4.0-15061.28.coco15sp6.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-coco-devel package and not the kernel-coco-devel package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

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

net: stmmac: Fix accessing freed irq affinity_hint

In stmmac_request_irq_multi_msi(), a pointer to the stack variable cpu_mask is passed to irq_set_affinity_hint(). This value is stored in irq_desc->affinity_hint, but once stmmac_request_irq_multi_msi() returns, the pointer becomes dangling.

The affinity_hint is exposed via procfs with S_IRUGO permissions, allowing any unprivileged process to read it. Accessing this stale pointer can lead to:

  • a kernel oops or panic if the referenced memory has been released and unmapped, or
  • leakage of kernel data into userspace if the memory is re-used for other purposes.

All platforms that use stmmac with PCI MSI (Intel, Loongson, etc) are affected.

CVSS Base Scores

version 3.1