What’s Vulnerable › Vulnerabilities

CVE-2026-68351: wifi: carl9170: bound memcpy length in cmd callback to prevent OOB read

• 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: 2026-08-10 · updated 2026-08-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: carl9170: bound memcpy length in cmd callback to prevent OOB read When the firmware sends a command response with a length mismatch, carl9170_cmd_callback() logs the mismatch and calls carl9170_restart() but then falls through to memcpy(ar->readbuf, buffer + 4, len - 4). Since len comes from the firmware and can exceed ar->readlen, this copies more data than the readbuf was allocated for. Bound the memcpy to min(len - 4, ar->readlen) so that the response is still completed -- avoiding repeated restarts from queued garbage -- while preventing an overread past the response buffer.

Affected products

• Linux kernel: 2.6.37 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2d05c321d27624c413c950278d2dc8e0f44a8950
• https://git.kernel.org/stable/c/38e240996a6a78c94ab07d461fd66e361d55c3c4
• https://git.kernel.org/stable/c/4cde55b2feff9504d1f993ab80e84e7ccb62791c
• https://git.kernel.org/stable/c/500c36649f270de05a56591fcc1aaaa36687958e
• https://git.kernel.org/stable/c/525036b20ef01d814a7fcd0567d123992e4479fa
• https://git.kernel.org/stable/c/9aee949c68dc6dccbc54333537b109c53fe2079f
• https://git.kernel.org/stable/c/cb7a38810cf25738176dac32dec7a146b3f959cf
• https://git.kernel.org/stable/c/f74e34e66379e487a09009a4f2d42470051672bd

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