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VulnerabilityPublished Updated

CVE-2026-45898: Linux kernel · RDMA/iwcm: Fix workqueue list corruption by removing work_list

Affects Linux kernelSource GCVE Database

0
Authoritative record:CVE-2026-45898· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical · fixed in 6.17.0-1019.19~24.04.1 : patch Linux kernel as a priority.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.17.0-1019.19~24.04.1, 6.17.0-1020.22~24.04.1, 6.17.0-40.40~24.04.1 +11
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde@7.0.0-1008.8?arch=source&distro=resoluteOther threatsAffected
  • 7.0.0-1003.3 – 7.0.0-1008.8
4 affected builds
Fixed in–
Ubuntu 25.10linuxpkg:deb/ubuntu/linux@6.17.0-40.40?arch=source&distro=questingOther threatsAffected
  • <6.17.0-40.40
Fixed in
  • 6.17.0-40.40
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1019.19?arch=source&distro=questingOther threatsAffected
  • <6.17.0-1019.19
Fixed in
  • 6.17.0-1019.19
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1020.20?arch=source&distro=questingOther threatsAffected
  • 6.14.0-1004.4 – 6.17.0-1020.20
16 affected builds
Fixed in–
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threatsAffected
  • 6.17.0-1003.3 – 6.17.0-1017.17
10 affected builds
Fixed in–
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp@6.17.0-1020.22?arch=source&distro=questingOther threatsAffected
  • <6.17.0-1020.22
Fixed in
  • 6.17.0-1020.22

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and included in Linux kernel versions 6.17.0-1019.19 and later, as well as other specified patched builds. Users should update their systems to these fixed kernel versions to remediate the vulnerability. After updating, a system reboot is required. Due to ABI changes, third-party kernel modules must be recompiled and reinstalled. Follow the vendor advisory instructions for proper update and module recompilation.

Description

A vulnerability in the Linux kernel's RDMA/iwcm subsystem caused workqueue list corruption due to improper handling of queued work items. The issue arises from the use of a free list of work structures that can be reused while still queued, leading to list corruption and kernel crashes. This flaw was fixed by removing the redundant work_list, relying on the workqueue's internal handling. The vulnerability affects multiple Linux kernel versions prior to 6.17.0-1019 and related builds. A high-severity fix is available and included in updated kernel releases.

References

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