7.8

CVE-2023-53539: RDMA/rxe: Fix incomplete state save in rxe_requester

Modified
AliasesUBUNTU-CVE-2023-53539DEBIAN-CVE-2023-53539
Published 04-10-2025Last modified 05-08-2026

Vulnerability summary

CVE-2023-53539 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 25 · Related 12
RHSA-2024:2394RHSA-2025:22800RHSA-2025:22801RHSA-2026:0534RHSA-2026:0535RHSA-2026:10756

Timeline

  1. 04-10-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu123 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 3050b99850247695cb07a5c15265afcc08bcf400, < 70518f3aaf5a059b691867d7d2d46b999319656a | ≥ 3050b99850247695cb07a5c15265afcc08bcf400, < 2f2a6422287fe29f9343247d77b645100ece0652 | ≥ 3050b99850247695cb07a5c15265afcc08bcf400, < 255c0e60e1d16874fc151358d94bc8df661600dd | ≥ 3050b99850247695cb07a5c15265afcc08bcf400, < 5d122db2ff80cd2aed4dcd630befb56b51ddf947 | 4.8
  • linux_kernel≥ 4.8.1, < 6.1.53 | ≥ 6.2, < 6.4.16 | ≥ 6.5, < 6.5.3 | 4.8 | 4.8:rc7 | 4.8:rc8
Debian1 product
  • linux< 6.1.55-1 | < 6.5.3-1

3 vendors · 126 products

References

8 links