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
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
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 20 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| linux-hwe-edge | Affected
| Fixed in
|
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
- access.redhat.com/errata/RHSA-2025:14510 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2367500 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2376392 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2383463 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_14510.json (opens in a new tab)
- ubuntu.com/security/CVE-2025-37914 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-37914 (opens in a new tab)
- git.kernel.org/linus/1a6d0c00fa07972384b0c308c72db091d49988b6 (opens in a new tab)
- git.kernel.org/stable/c/1a6d0c00fa07972384b0c308c72db091d49988b6 (opens in a new tab)
- git.kernel.org/stable/c/1f01e9f961605eb397c6ecd1d7b0233dfbf9077c (opens in a new tab)
- git.kernel.org/stable/c/554acc5a2ea9703e08023eb9a003f9e5a830a502 (opens in a new tab)
- git.kernel.org/stable/c/72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3 (opens in a new tab)
- git.kernel.org/stable/c/9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990 (opens in a new tab)
- git.kernel.org/stable/c/bc321f714de693aae06e3786f88df2975376d996 (opens in a new tab)
- ubuntu.com/security/notices/USN-7649-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7650-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7655-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7649-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7665-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7665-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-5 (opens in a new tab)