What’s Vulnerable › Vulnerabilities

CVE-2026-97600: ieee802154: cc2520: fix FIFOP work use-after-free

• 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: 2026-09-25 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: ieee802154: cc2520: fix FIFOP work use-after-free The FIFOP interrupt handler queues cc2520_fifop_irqwork. On removal, cc2520_remove() only flushes the work. The devm-managed FIFOP IRQ remains active until after ->remove() returns and can queue the work again after that flush, allowing it to run after the private data is released. Disable the work with disable_work_sync() instead of flushing it, so the handler can no longer queue it once removal begins. Destroy the buffer mutex last, since the worker and the stop callback invoked through ieee802154_unregister_hw() both take it. Found by an in-house static analysis tool.

Affected products

• Linux kernel: 3.17 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4a1ba62a486a4c43af91d01661a95e82dc4aaefa
• https://git.kernel.org/stable/c/56a9919d8494fb118eebf167bef0622528fbf2e7
• https://git.kernel.org/stable/c/890a80d516a1447db5c21bf92841a82914ea897d
• https://git.kernel.org/stable/c/c68fd52c73b676aee67020011e98fea125a978f4
• https://git.kernel.org/stable/c/ff5891b266a7fc6a062710836be84f1cc19338b5

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