Vulnerability Description
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.
References
- https://git.kernel.org/stable/c/673478bc29cf72010faaf293c1c8c667393335a0
- https://git.kernel.org/stable/c/a5a05410cb34bfa486d63684cdc1f87a3b13f20a
- https://git.kernel.org/stable/c/ea69e7a6efa88ef32090a91064c362738cc19ddd
FAQ
What is CVE-2026-63932?
CVE-2026-63932 is a documented vulnerability. 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_SI...
How severe is CVE-2026-63932?
CVSS scoring is not yet available for CVE-2026-63932. Check NVD for updates.
Is there a patch for CVE-2026-63932?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.