Description
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.
Product status
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before 118e12bf3e4288cf845cd3759bd9d4c99f91aab5
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before 6a96bd0d94305fd04a6ac64446ec113bae289384
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before e2f3ea15e804607e0a4a34a2f6c331c8750b68bc
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before dc153401fb26c1640a2b279c47b65e1c416af276
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before 4758770a673c60d8f615809304d72e1432fa6355
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before 638d4148e166d114a4cd7becaae992ce1a815ed8
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before 5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15
6f7853f3cbe457067e9fe05461f56c7ea4ac488c (git) before b647d2574e4583c2e3b0ab35568f60c88e910840
2.6.27
Any version before 2.6.27
5.10.248 (semver)
5.15.198 (semver)
6.1.160 (semver)
6.6.120 (semver)
6.12.63 (semver)
6.17.13 (semver)
6.18.2 (semver)
6.19 (original_commit_for_fix)
References
git.kernel.org/...c/118e12bf3e4288cf845cd3759bd9d4c99f91aab5
git.kernel.org/...c/6a96bd0d94305fd04a6ac64446ec113bae289384
git.kernel.org/...c/e2f3ea15e804607e0a4a34a2f6c331c8750b68bc
git.kernel.org/...c/dc153401fb26c1640a2b279c47b65e1c416af276
git.kernel.org/...c/4758770a673c60d8f615809304d72e1432fa6355
git.kernel.org/...c/638d4148e166d114a4cd7becaae992ce1a815ed8
git.kernel.org/...c/5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15
git.kernel.org/...c/b647d2574e4583c2e3b0ab35568f60c88e910840