CVE-2021-47518: nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done

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: 2024-05-24 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done The done() netlink callback nfc_genl_dump_ses_done() should check if received argument is non-NULL, because its allocation could fail earlier in dumpit() (nfc_genl_dump_ses()).

Affected products

Linux kernel: from 3.12 before 4.4.295; from 4.5 before 4.9.293; from 4.10 before 4.14.258; from 4.15 before 4.19.221; from 4.20 before 5.4.165; from 5.5 before 5.10.85 — fixed in 4.14.258, 4.19.221, 4.4.295, 4.9.293, 5.10.85, 5.15.8

How to fix

Upgrade to a fixed version: Linux kernel 4.14.258, 4.19.221, 4.4.295, 4.9.293. Check the vendor advisory for mitigations.

References

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