Skip to content
CVE PROGRAM SOURCE RECORD7.5 High

CVE-2025-21676

net: fec: handle page_pool_dev_alloc_pages error

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 95698ff6177b5f1f13f251da60e7348413046ae4 to < eacdcc14f3c8d4c1447565521e792ddb3a67e08daffected
  • 95698ff6177b5f1f13f251da60e7348413046ae4 to < 8a0097db0544b658c159ac787319737712063a23affected
  • 95698ff6177b5f1f13f251da60e7348413046ae4 to < 1425cb829556398f594658512d49292f988a2ab0affected
  • 95698ff6177b5f1f13f251da60e7348413046ae4 to < 001ba0902046cb6c352494df610718c0763e77a5affected

Linux Linux

Default version status: affected

  • 6.1affected
  • 0 to < 6.1unaffected
  • 6.1.167 to ≤ 6.1.*unaffected
  • 6.6.74 to ≤ 6.6.*unaffected
  • 6.12.11 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References