CVE-2025-23155

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-23155
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985 Patch
https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd Patch
https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef Patch
https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

05 Nov 2025, 15:31

Type Values Removed Values Added
CWE NVD-CWE-Other
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985 - () https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985 - Patch
References () https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd - () https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd - Patch
References () https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef - () https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef - Patch
References () https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef - () https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef - Patch

29 Sep 2025, 11:15

Type Values Removed Values Added
Summary (en) In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix accessing freed irq affinity_hint The cpumask should not be a local variable, since its pointer is saved to irq_desc and may be accessed from procfs. To fix it, use the persistent mask cpumask_of(cpu#). (en) 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.

06 Jul 2025, 10:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985 -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: stmmac: Se corrige el acceso a la IRQ liberada affinity_hint. La máscara cpu no debe ser una variable local, ya que su puntero se guarda en irq_desc y se puede acceder desde procfs. Para corregirla, utilice la máscara persistente cpumask_of(cpu#).

01 May 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 13:15

Updated : 2025-11-05 15:31

NVD link : CVE-2025-23155

Mitre link : CVE-2025-23155

CVE.ORG link : CVE-2025-23155

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-Other