CVE-2025-21676

MEDIUM EPSS 10.0%
Published Jan 31, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 31, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: fec: handle page_pool_dev_alloc_pages error The fec_enet_update_cbd function calls page_pool_dev_alloc_pages but did not handle the case when it returned NULL. There was a WARN_ON(!new_page) but it would still proceed to use the NULL pointer and then crash. This case does seem somewhat rare but when the system is under memory pressure it can happen. One case where I can duplicate this with some frequency is when writing over a smbd share to a SATA HDD attached to an imx6q. Setting /proc/sys/vm/min_free_kbytes to higher values also seems to solve the problem for my test case. But it still seems wrong that the fec driver ignores the memory allocation error and can crash. This commit handles the allocation error by dropping the current packet.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
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

Threat Intelligence

EPSS Exploit Probability
10.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥6.1  –  <6.6.74
linuxlinux_kernel*≥6.7  –  <6.12.11
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/001ba0902046cb6c352494df610718c0763e77a5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eacdcc14f3c8d4c1447565521e792ddb3a67e08d

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/001ba0902046cb6c352494df610718c0763e77a5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23
    Patch