CVE-2021-29264

Name: CVE-2021-29264
Creator: NVD / NIST
Published: 2021-03-26T22:15:13.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2021-29264 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An issue was discovered in the Linux kernel through 5.11.10. drivers/net/ethernet/freescale/gianfar.c in the Freescale Gianfar Ethernet driver allows attackers to cause a system crash because a negative fragment size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is enabled, aka CID-d8861bab48b6.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

An issue was discovered in the Linux kernel through 5.11.10. drivers/net/ethernet/freescale/gianfar.c in the Freescale Gianfar Ethernet driver allows attackers to cause a system crash because a negative fragment size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is enabled, aka CID-d8861bab48b6.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.27%

18.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	<= 5.11.10
Debian	Debian Linux	9.0

References

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=d8861bab48b6c1fc3cdbcab8ff9d1eaea43afe7fPatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=d8861bab48b6c1fc3cdbcab8ff9d1eaea43afe7fPatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlThird Party Advisory

Timeline

Published: Mar 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29264?

How severe is CVE-2021-29264?

CVE-2021-29264 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29264?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29264?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST