Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv rxe_rcv() currently checks only that the incoming packet is at least header_size(pkt) bytes long before payload_size() is used. However, payload_size() subtracts both the attacker-controlled BTH pad field and RXE_ICRC_SIZE from pkt->paylen: payload_size = pkt->paylen - offset[RXE_PAYLOAD] - bth_pad(pkt) - RXE_ICRC_SIZE This means a short packet can still make payload_size() underflow even if it includes enough bytes for the fixed headers. Simply requiring header_size(pkt) + RXE_ICRC_SIZE is not sufficient either, because a packet with a forged non-zero BTH pad can still leave payload_size() negative and pass an underflowed value to later receive-path users. Fix this by validating pkt->paylen against the full minimum length required by payload_size(): header_size(pkt) + bth_pad(pkt) + RXE_ICRC_SIZE.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8700e3e7c4857d28ebaa824509934556da0b3e76 to < c4376c672c3648d5bdc31dfffc329d07164f93c4affected8700e3e7c4857d28ebaa824509934556da0b3e76 to < 5fedefec757192dcaad29a664ac332c7601be144affected8700e3e7c4857d28ebaa824509934556da0b3e76 to < 2c0d71ef12f46c57d37bc571f3f2797db7eb50ccaffected8700e3e7c4857d28ebaa824509934556da0b3e76 to < 2fd4f8b749309a61c3f3f88ee8891d94f79e1240affected8700e3e7c4857d28ebaa824509934556da0b3e76 to < f83519a4c122c9c7a850a2197648a9ff4c67c520affected8700e3e7c4857d28ebaa824509934556da0b3e76 to < 9b924f3a26b21330a837cfe72e819b6393bbeeaaaffected8700e3e7c4857d28ebaa824509934556da0b3e76 to < e8ee0e792d475b1067c199ef0af1b6221fa6f43daffected8700e3e7c4857d28ebaa824509934556da0b3e76 to < 7244491dab347f648e661da96dc0febadd9daec3affected
Linux Linux
Default version status: affected
4.8affected0 to < 4.8unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.140 to ≤ 6.6.*unaffected6.12.86 to ≤ 6.12.*unaffected6.18.27 to ≤ 6.18.*unaffected7.0.4 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c4376c672c3648d5bdc31dfffc329d07164f93c4 ↗
- https://git.kernel.org/stable/c/5fedefec757192dcaad29a664ac332c7601be144 ↗
- https://git.kernel.org/stable/c/2c0d71ef12f46c57d37bc571f3f2797db7eb50cc ↗
- https://git.kernel.org/stable/c/2fd4f8b749309a61c3f3f88ee8891d94f79e1240 ↗
- https://git.kernel.org/stable/c/f83519a4c122c9c7a850a2197648a9ff4c67c520 ↗
- https://git.kernel.org/stable/c/9b924f3a26b21330a837cfe72e819b6393bbeeaa ↗
- https://git.kernel.org/stable/c/e8ee0e792d475b1067c199ef0af1b6221fa6f43d ↗
- https://git.kernel.org/stable/c/7244491dab347f648e661da96dc0febadd9daec3 ↗