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CVE-2022-49331: nfc: st21nfca: fix memory leaks in EVT_TRANSACTION handling

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: st21nfca: fix memory leaks in EVT_TRANSACTION handling Error paths do not free previously allocated memory. Add devm_kfree() to those failure paths.

Affected products

• Linux kernel: from 4.0 before 4.9.318; from 4.10 before 4.14.283; from 4.15 before 4.19.247; from 4.20 before 5.4.198; from 5.5 before 5.10.122; from 5.11 before 5.15.47 — fixed in 4.14.283, 4.19.247, 4.9.318, 5.10.122, 5.15.47, 5.17.15

How to fix

Upgrade to a fixed version: Linux kernel 4.14.283, 4.19.247, 4.9.318, 5.10.122. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3eca2c42daa4659965db6817479027cbc6df7899
• https://git.kernel.org/stable/c/54423649bc0ed464b75807a7cf2857a5871f738f
• https://git.kernel.org/stable/c/55904086041ba4ee4070187b36590f8f8d6df4cd
• https://git.kernel.org/stable/c/593773088d615a46a42c97e01a0550d192bb7f74
• https://git.kernel.org/stable/c/6fce324b530dd74750ad870699e33eeed1029ded
• https://git.kernel.org/stable/c/996419e0594abb311fb958553809f24f38e7abbe
• https://git.kernel.org/stable/c/d221ce54ce331c1a23be71eebf57f6a088632383
• https://git.kernel.org/stable/c/db836b97464d44340b568e041fd24602858713f7
• https://git.kernel.org/stable/c/f444ecd3f57f4ba5090fe8b6756933e37de4226e

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