CVE-2023-53539

Packet corruption via incomplete DMA state restoration

Published Oct 4, 2025 · Updated Oct 4, 2025

State-restoration error in the Linux kernel RDMA/rxe requester allows local users to corrupt retransmitted Soft-RoCE packets under load. In rxe_requester(), packet construction advances the WQE dma scatter-gather state before it is saved, while rollback omits that state after rxe_xmit_packet() returns -EAGAIN. Reachability requires an active Soft-RoCE device, local low-privileged access, packet loss, and a heavy workload with many queue pairs sending large messages from a fast node to a slow node.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

State-restoration error in the Linux kernel RDMA/rxe requester allows local users to corrupt retransmitted Soft-RoCE packets under load. In rxe_requester(), packet construction advances the WQE dma scatter-gather state before it is saved, while rollback omits that state after rxe_xmit_packet() returns -EAGAIN. Reachability requires an active Soft-RoCE device, local low-privileged access, packet loss, and a heavy workload with many queue pairs sending large messages from a fast node to a slow node.

The record

CVE
CVE-2023-53539
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3050b99850247695cb07a5c15265afcc08bcf400 <255c0e60e1d16874fc151358d94bc8df661600dd
  2. Affected versionversion=3050b99850247695cb07a5c15265afcc08bcf400 <2f2a6422287fe29f9343247d77b645100ece0652
  3. Affected versionversion=3050b99850247695cb07a5c15265afcc08bcf400 <5d122db2ff80cd2aed4dcd630befb56b51ddf947
  4. Affected versionversion=3050b99850247695cb07a5c15265afcc08bcf400 <70518f3aaf5a059b691867d7d2d46b999319656a
  5. Affected versionversion=4.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3050b99850247695cb07a5c15265afcc08bcf400 <255c0e60e1d16874fc151358d94bc8df661600dd; version=3050b99850247695cb07a5c15265afcc08bcf400 <2f2a6422287fe29f9343247d77b645100ece0652; version=3050b99850247695cb07a5c15265afcc08bcf400 <5d122db2ff80cd2aed4dcd630befb56b51ddf947; version=3050b99850247695cb07a5c15265afcc08bcf400 <70518f3aaf5a059b691867d7d2d46b999319656a; version=4.8

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo