What’s Vulnerable › Vulnerabilities

CVE-2022-3635: Linux Kernel IPsec idt77252.c tst_timer use after free

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-10-21 · updated 2026-10-14
• Weakness: CWE-119

Description

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.

Affected products

• Debian Linux: 10.0
• Linux kernel: from 2.6.12 before 4.9.326; from 4.10 before 4.14.291; from 4.15 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.138; from 5.11 before 5.15.63 — fixed in 4.14.291, 4.19.256, 4.9.326, 5.10.138, 5.15.63, 5.19.4

How to fix

Upgrade to a fixed version: Linux kernel 4.14.291, 4.19.256, 4.9.326, 5.10.138. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git/commit/?id=3f4093e2bf4673f218c0bf17d8362337c400e77b
• https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
• https://vuldb.com/?id.211934
• https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git/commit/?id=3f4093e2bf4673f218c0bf17d8362337c400e77b
• https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
• https://vuldb.com/?id.211934
• https://cert-portal.siemens.com/productcert/html/ssa-794697.html

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