CVE-2024-35915: nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet

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: 2024-05-19 · updated 2026-10-15
Weakness: CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet syzbot reported the following uninit-value access issue [1][2]: nci_rx_work() parses and processes received packet. When the payload length is zero, each message type handler reads uninitialized payload and KMSAN detects this issue. The receipt of a packet with a zero-size payload is considered unexpected, and therefore, such packets should be silently discarded. This patch resolved this issue by checking payload size before calling each message type handler codes.

Affected products

Debian Linux: 10.0
Linux kernel: from 3.2 before 4.19.312; from 4.20 before 5.4.274; from 5.5 before 5.10.215; from 5.11 before 5.15.154; from 5.16 before 6.1.85; from 6.2 before 6.6.26 — fixed in 4.19.312, 5.10.215, 5.15.154, 5.4.274, 6.1.85, 6.6.26

How to fix

Upgrade to a fixed version: Linux kernel 4.19.312, 5.10.215, 5.15.154, 5.4.274. Check the vendor advisory for mitigations.

References

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