Answer in brief
CVE-2026-46043 records a Critical severity (CVSS 9.1) vulnerability in RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8700e3e7c4857d28ebaa824509934556da0b3e76 <c4376c672c3648d5bdc31dfffc329d07164f93c4 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <5fedefec757192dcaad29a664ac332c7601be144 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <2c0d71ef12f46c57d37bc571f3f2797db7eb50cc || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <2fd4f8b749309a61c3f3f88ee8891d94f79e1240 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <f83519a4c122c9c7a850a2197648a9ff4c67c520 || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <9b924f3a26b21330a837cfe72e819b6393bbeeaa || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <e8ee0e792d475b1067c199ef0af1b6221fa6f43d || >=8700e3e7c4857d28ebaa824509934556da0b3e76 <7244491dab347f648e661da96dc0febadd9daec3 | c4376c672c3648d5bdc31dfffc329d07164f93c4, 5fedefec757192dcaad29a664ac332c7601be144, 2c0d71ef12f46c57d37bc571f3f2797db7eb50cc, 2fd4f8b749309a61c3f3f88ee8891d94f79e1240, f83519a4c122c9c7a850a2197648a9ff4c67c520, 9b924f3a26b21330a837cfe72e819b6393bbeeaa, e8ee0e792d475b1067c199ef0af1b6221fa6f43d, 7244491dab347f648e661da96dc0febadd9daec3 |
| Linux/Linuxgeneric | 4.8 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.