Riskcovery

CVE-2023-53539

RDMA/rxe: Fix incomplete state save in rxe_requester

State
Published
Severity
7.8 High
Published
Oct 4, 2025
Updated
Aug 5, 2026
Reserved
Oct 4, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/rxe: Fix incomplete state save in rxe_requester

If a send packet is dropped by the IP layer in rxe_requester() the call to rxe_xmit_packet() can fail with err == -EAGAIN. To recover, the state of the wqe is restored to the state before the packet was sent so it can be resent. However, the routines that save and restore the state miss a significnt part of the variable state in the wqe, the dma struct which is used to process through the sge table. And, the state is not saved before the packet is built which modifies the dma struct.

Under heavy stress testing with many QPs on a fast node sending large messages to a slow node dropped packets are observed and the resent packets are corrupted because the dma struct was not restored. This patch fixes this behavior and allows the test cases to succeed.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 3050b99850247695cb07a5c15265afcc08bcf400 to before 70518f3aaf5a059b691867d7d2d46b999319656aAffected
  • 3050b99850247695cb07a5c15265afcc08bcf400 to before 2f2a6422287fe29f9343247d77b645100ece0652Affected
  • 3050b99850247695cb07a5c15265afcc08bcf400 to before 255c0e60e1d16874fc151358d94bc8df661600ddAffected
  • 3050b99850247695cb07a5c15265afcc08bcf400 to before 5d122db2ff80cd2aed4dcd630befb56b51ddf947Affected
LinuxLinux
  • 4.8Affected
  • before 4.8Not affected
  • 6.1.53 through 6.1.*Not affected
  • 6.4.16 through 6.4.*Not affected
  • 6.5.3 through 6.5.*Not affected
  • 6.6 and laterNot affected

References

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