CVE-2026-68313: tipc: fix infinite loop in __tipc_nl_compat_dumpit

Severity: unknown
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: 2026-08-10 · updated 2026-08-19

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: fix infinite loop in __tipc_nl_compat_dumpit cmd->dumpit callback can return a negative errno, causing an infinite loop due to the while(len) condition. As the loop never terminates, genl_mutex is never released, and other tasks waiting on it starve in D state. Check dumpit's return value, propagate it and jump to err_out on error.

Affected products

Linux kernel: 4.0 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/1ab78af2140189b735b8d3b889b0284128cb2013
https://git.kernel.org/stable/c/22f8aa35964e8f2ab026578f45befc9605fd1b28
https://git.kernel.org/stable/c/2a1c1397275f27e33b6a2a565d81cfef0deb6656
https://git.kernel.org/stable/c/98d09766cee3182aae292886e2fef0cbe8dba537
https://git.kernel.org/stable/c/9cd8c88e1336ec0fbe02af1ddf2b52838d30fae4
https://git.kernel.org/stable/c/b8f3b8efa5f99081b14de1a7ffa68a81bf01bd48
https://git.kernel.org/stable/c/e740e90ca8e7f70d9eac1aa31a8b3e0e4d32b2ef
https://git.kernel.org/stable/c/f9c669d9f4cac832fe31193cdbc24c6a9d99398b

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