CVE-2025-68362
In the Linux kernel, the following vulnerability has been resolved: wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb() The rtl8187_rx_cb() calculates the rx descriptor header address by subtracting its size from the skb tail pointer. However, it does not validate if the received packet (skb->len from urb->actual_length) is large enough to contain this header. If a truncated packet is received, this will lead to a buffer underflow, reading memory before the start of the skb data area, and causing a kernel panic. Add length checks for both rtl8187 and rtl8187b descriptor headers before attempting to access them, dropping the packet cleanly if the check fails.
Affected versions
Linux kernel versions
2.6.27
and later are affected. Fixed in
5.10.248,
5.15.198,
6.1.160,
6.6.120,
6.12.63,
6.17.13,
6.18.2,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2025-68362 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
-
PatchKernel patch commithttps://git.kernel.org/stable/c/118e12bf3e4288cf845cd3759bd9d4c99f91aab5
-
PatchKernel patch commithttps://git.kernel.org/stable/c/4758770a673c60d8f615809304d72e1432fa6355
-
PatchKernel patch commithttps://git.kernel.org/stable/c/5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15
Frequently asked questions
-
What is CVE-2025-68362?
CVE-2025-68362 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.27 onward and has been patched in 5.10.248, 5.15.198, 6.1.160 and others. CVE-2025-68362 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2025-68362?
Yes — CVE-2025-68362 has been patched. Fixed versions include 5.10.248, 5.15.198, 6.1.160 and others. If you are running Linux kernel 2.6.27 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2025-68362 actively exploited?
No — CVE-2025-68362 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.