CVE-2025-68362
wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.27
References 8
git.kernel.org
- stable/c/118e12bf3e4288cf845cd3759bd9d4c99f91aab5
- stable/c/6a96bd0d94305fd04a6ac64446ec113bae289384
- stable/c/e2f3ea15e804607e0a4a34a2f6c331c8750b68bc
- stable/c/dc153401fb26c1640a2b279c47b65e1c416af276
- stable/c/4758770a673c60d8f615809304d72e1432fa6355
- stable/c/638d4148e166d114a4cd7becaae992ce1a815ed8
- stable/c/5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15
- stable/c/b647d2574e4583c2e3b0ab35568f60c88e910840