CVE-2026-93163
In the Linux kernel, the following vulnerability has been resolved: hwrng: core - fix rng list on registration error hwrng_register(rng) does the following: 1. Checks if rng has name and read methods set 2. Checks if the name already exists 3. Adds rng to global rng_list 4. May try to set rng to current_rng If step 4 fails, it returns an error. However, it does not remove the rng from rng_list, causing a dangling reference which can result in use-after-free if the caller frees rng, since registration failed. Add a list_del_init() cleanup step.
Affected versions
Linux kernel versions
4.9.320,
4.14
and later are affected. Fixed in
6.12.110,
6.18.52,
7.2.6,
7.3-rc1
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-93163?
CVE-2026-93163 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.9.320 onward and has been patched in 6.12.110, 6.18.52, 7.2.6 and others. CVE-2026-93163 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-93163?
Yes. CVE-2026-93163 has been patched. Fixed versions include 6.12.110, 6.18.52, 7.2.6 and others. If you are running Linux kernel 4.9.320 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-93163 actively exploited?
No. CVE-2026-93163 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.