What’s Vulnerable › Vulnerabilities

CVE-2021-47122: net: caif: fix memory leak in caif_device_notify

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-15 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: net: caif: fix memory leak in caif_device_notify In case of caif_enroll_dev() fail, allocated link_support won't be assigned to the corresponding structure. So simply free allocated pointer in case of error

Affected products

• Linux kernel: from 3.3 before 4.4.272; from 4.5 before 4.9.272; from 4.10 before 4.14.236; from 4.15 before 4.19.194; from 4.20 before 5.4.125; from 5.5 before 5.10.43 — fixed in 4.14.236, 4.19.194, 4.4.272, 4.9.272, 5.10.43, 5.12.10

How to fix

Upgrade to a fixed version: Linux kernel 4.14.236, 4.19.194, 4.4.272, 4.9.272. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3be863c11cab725add9fef4237ed4e232c3fc3bb
• https://git.kernel.org/stable/c/4bca2034b41c15b62d47a19158bb76235fd4455d
• https://git.kernel.org/stable/c/6a0e317f61094d377335547e015dd2ff12caf893
• https://git.kernel.org/stable/c/9348c1f10932f13b299cbc8b1bd5f780751fae49
• https://git.kernel.org/stable/c/af2806345a37313f01b1c9f15e046745b8ee2daa
• https://git.kernel.org/stable/c/b042e2b2039565eb8f0eb51c14fbe1ef463c8cd8
• https://git.kernel.org/stable/c/b53558a950a89824938e9811eddfc8efcd94e1bb
• https://git.kernel.org/stable/c/f52f4fd67264c70cd0b4ba326962ebe12d9cba94
• https://git.kernel.org/stable/c/3be863c11cab725add9fef4237ed4e232c3fc3bb
• https://git.kernel.org/stable/c/4bca2034b41c15b62d47a19158bb76235fd4455d
• https://git.kernel.org/stable/c/6a0e317f61094d377335547e015dd2ff12caf893
• https://git.kernel.org/stable/c/9348c1f10932f13b299cbc8b1bd5f780751fae49

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