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CVE-2025-37914VulnerabilityPublished Updated

CVE-2025-37914: Linux hwe edge · In the Linux kernel, the following vulnerability has been resolved: net_sched: ets: Fix double list add in class with netem as child qdisc As

Affects linux-hwe-edgeSource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited · CVSS 7.8 High · fixed in 5.15.0-1094.103~20.04.1 : patch linux-hwe-edge soon.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.15.0-1094.103~20.04.1, 5.15.0-1088.95~20.04.1, 5.15.0-1087.96~20.04.2 +2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 2025

  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 2026-10-25.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
linux-hwe-edgeAffected
  • Red Hat
  • Red Hat Enterprise Linux
  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux BaseOS (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • <5.15.0-1088.95~20.04.1
  • <5.15.0-1094.103~20.04.1
  • <5.15.0-1087.96~20.04.2
  • <5.15.0-144.157~20.04.1
  • <5.15.0-1080.83~20.04.1
Fixed in
  • 5.15.0-1088.95~20.04.1
  • 5.15.0-1094.103~20.04.1
  • 5.15.0-1087.96~20.04.2
  • 5.15.0-144.157~20.04.1
  • 5.15.0-1080.83~20.04.1

AI-suggested

Red Hat has released official kernel updates that address these vulnerabilities. Users should apply the updated kernel packages for Red Hat Enterprise Linux 10 and related products as provided in advisory RHSA-2025:14510. A system reboot is required for the update to take effect. No additional mitigations are specified beyond applying the official patches and rebooting.

Description

In the Linux kernel, the following vulnerability has been resolved: net_sched: ets: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of ets, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. In addition to checking for qlen being zero, this patch checks whether the class was already added to the active_list (cl_is_active) before doing the addition to cater for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

References

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