Veille CVE
CVE-2026-46043
9.1 CritiqueDescription
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.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 9.1 Critique | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Faiblesses (CWE)
Références
- https://git.kernel.org/stable/c/2c0d71ef12f46c57d37bc571f3f2797db7eb50cc Patch
- https://git.kernel.org/stable/c/2fd4f8b749309a61c3f3f88ee8891d94f79e1240 Patch
- https://git.kernel.org/stable/c/5fedefec757192dcaad29a664ac332c7601be144 Patch
- https://git.kernel.org/stable/c/7244491dab347f648e661da96dc0febadd9daec3 Patch
- https://git.kernel.org/stable/c/9b924f3a26b21330a837cfe72e819b6393bbeeaa Patch
- https://git.kernel.org/stable/c/c4376c672c3648d5bdc31dfffc329d07164f93c4 Patch
- https://git.kernel.org/stable/c/e8ee0e792d475b1067c199ef0af1b6221fa6f43d Patch
- https://git.kernel.org/stable/c/f83519a4c122c9c7a850a2197648a9ff4c67c520 Patch