What is CVE-2022-3635?

CVE-2022-3635 is a medium-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2022-10-21.

How severe is CVE-2022-3635?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Linux Kernel

CVE-2022-3635

A vulnerability, which was classified as critical, has been found in Linux Kernel. Affected by this issue is the function tst_timer of the file drivers/atm/idt77252.c of the component IPsec. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. VDB-211934 is the identifier assigned to this vulnerability.

Vulnerability class: Buffer Overflow

Published 2022-10-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (34.6th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

References

git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git/commit/ (Exploit, Patch, Mailing List, Vendor Advisory)
vuldb.com/ (Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/11/msg00001.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2022-3635?: CVE-2022-3635 is a medium-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2022-10-21.
How severe is CVE-2022-3635?: Medium severity. CVSS v3 base score is 5.5 out of 10.