What is CVE-2021-29265?

CVE-2021-29265 is a medium-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.7/10. Published 2021-03-26.

How severe is CVE-2021-29265?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Linux Kernel

CVE-2021-29265

An issue was discovered in the Linux kernel before 5.11.7. usbip_sockfd_store in drivers/usb/usbip/stub_dev.c allows attackers to cause a denial of service (GPF) because the stub-up sequence has race conditions during an update of the local and shared status, aka CID-9380afd6df70.

Vulnerability class: Race Condition

Published 2021-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (15.9th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Linux Kernel
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/ (Patch, Vendor Advisory)
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 (Release Notes, Vendor Advisory)
lists.debian.org/debian-lts-announce/2021/06/msg00020.html (mailing-list, Third Party Advisory)

Frequently asked questions

What is CVE-2021-29265?: CVE-2021-29265 is a medium-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.7/10. Published 2021-03-26.
How severe is CVE-2021-29265?: Medium severity. CVSS v3 base score is 4.7 out of 10.