CVE-2024-56651: can: hi311x: hi3110_can_ist(): fix potential use-after-free

Severity: high (CVSS 7.8 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: 2024-12-27 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: can: hi311x: hi3110_can_ist(): fix potential use-after-free The commit a22bd630cfff ("can: hi311x: do not report txerr and rxerr during bus-off") removed the reporting of rxerr and txerr even in case of correct operation (i. e. not bus-off). The error count information added to the CAN frame after netif_rx() is a potential use after free, since there is no guarantee that the skb is in the same state. It might be freed or reused. Fix the issue by postponing the netif_rx() call in case of txerr and rxerr reporting.

Affected products

Linux kernel: from 4.14.291 before 4.15; from 4.19.256 before 4.20; from 5.4.211 before 5.5; from 5.10.137 before 5.11; from 5.15.61 before 5.16; from 5.18.18 before 5.19 — fixed in 4.15, 4.20, 5.11, 5.16, 5.19, 5.20

How to fix

Upgrade to a fixed version: Linux kernel 4.15, 4.20, 5.11, 5.16. Check the vendor advisory for mitigations.

References

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