CVE-2026-68479
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: validate firmware patch bounds rtlbt_parse_firmware() copies patch_length - 4 bytes before appending the firmware version. A malformed firmware patch shorter than the version field can make this subtraction underflow and turn the copy into an oversized read and write during Bluetooth setup. The existing patch_offset + patch_length check can also wrap on 32-bit architectures. Validate the patch length and range without arithmetic overflow before allocating or copying the patch.
Affected versions
Linux kernel versions
4.2
and later are affected. Fixed in
5.10.261,
5.15.212,
6.1.178,
6.6.145,
6.12.97,
6.18.40,
7.1.5,
7.2-rc4
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-68479?
CVE-2026-68479 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.2 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-68479 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-2026-68479?
Yes. CVE-2026-68479 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 4.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-68479 actively exploited?
No. CVE-2026-68479 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.