High 7.5Published Jan 31, 2025

CVE-2025-21676net: fec: handle page_pool_dev_alloc_pages error

Updated under an hour ago (Oct 27, 2026, 9:23 AM ET)

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Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 95698ff6177b5f1f13f251da60e7348413046ae4 before eacdcc14f3c8d4c1447565521e792ddb3a67e08d; 95698ff6177b5f1f13f251da60e7348413046ae4 builds before 8a0097db0544b658c159ac787319737712063a23; 95698ff6177b5f1f13f251da60e7348413046ae4 builds before 1425cb829556398f594658512d49292f988a2ab0; 95698ff6177b5f1f13f251da60e7348413046ae4 builds before 001ba0902046cb6c352494df610718c0763e77a5	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	from 6.1 before 6.6.74; from 6.7 before 6.12.11; 6.13; 6.13; 6.13; 6.13; 6.13; 6.13; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/eacdcc14f3c8d4c1447565521e792ddb3a67e08d
https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23	patch
https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0	patch
https://git.kernel.org/stable/c/001ba0902046cb6c352494df610718c0763e77a5	patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.