CVE-2026-63932
In the Linux kernel, the following vulnerability has been resolved: iio: chemical: mhz19b: reject oversized serial replies mhz19b_receive_buf() appends each serdev chunk into the fixed MHZ19B_CMD_SIZE receive buffer and advances buf_idx by len without checking that the chunk fits in the remaining space. A large callback can therefore overflow st->buf before the command path validates the reply. Reset the reply state before each command and reject oversized serial replies before copying them into the fixed buffer. When an oversized reply is detected, wake the waiter and report -EMSGSIZE instead of overwriting st->buf.
Affected versions
Linux kernel versions
6.16
and later are affected. Fixed in
6.18.35,
7.0.12,
7.1
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-63932?
CVE-2026-63932 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.16 onward and has been patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-63932 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-2026-63932?
Yes — CVE-2026-63932 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-63932 actively exploited?
No — CVE-2026-63932 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.