CVE-2025-37915

High

In the Linux kernel, the following vulnerability has been resolved: net_sched: drr: 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 drr, 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 adding to the list to cover for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

Package Linux Kernel
Published 2025-05-20
Last modified 2025-11-17
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.0

out of 10
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-415

CVE-2025-37915 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 5.0 and later are affected. Fixed in 5.4.294, 5.10.238, 5.15.182, 6.1.138, 6.6.90, 6.12.28, 6.14.6, 6.15 and their respective stable series.

Affected from
≥ 5.0
Fixed in
✓ 5.4.294 5.4.x ✓ 5.10.238 5.10.x ✓ 5.15.182 5.15.x ✓ 6.1.138 6.1.x ✓ 6.6.90 6.6.x ✓ 6.12.28 6.12.x ✓ 6.14.6 6.14.x ✓ 6.15

References

The following references provide additional information about CVE-2025-37915 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

8 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2025-37915?

    CVE-2025-37915 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 . It affects Linux kernel versions from 5.0 onward and has been patched in 5.4.294, 5.10.238, 5.15.182 and others. CVE-2025-37915 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2025-37915?

    CVE-2025-37915 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2025-37915?

    Yes — CVE-2025-37915 has been patched. Fixed versions include 5.4.294, 5.10.238, 5.15.182 and others. If you are running Linux kernel 5.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-37915 actively exploited?

    No — CVE-2025-37915 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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