CVE-2025-37914

Advisory lineage Upstream: 0 Downstream: 62
Analyzed
Published: 20 May 2025, 15:21
Last modified:11 May 2026, 21:17

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.09% LOW
0% probability +0.07%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 May 2025, 15:21
Published
Vulnerability first disclosed
11 May 2026, 21:17
Last Modified
Vulnerability information updated

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/

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.09%• Percentile: 25%

Techniques & Countermeasures

  • CWE-415•Double Free

    The product calls free() twice on the same memory address.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33, < 24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea | ≥ dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33, < 554acc5a2ea9703e08023eb9a003f9e5a830a502 | ≥ dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33, < 9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990 | ≥ dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33, < 72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3 | ≥ dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33, < 1f01e9f961605eb397c6ecd1d7b0233dfbf9077c | ≥ dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33, < bc321f714de693aae06e3786f88df2975376d996 | ≥ dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33, < 1a6d0c00fa07972384b0c308c72db091d49988b6 | 5.6

  • linux•linux_kernel

    ≥ 5.6, < 5.10.238 | ≥ 5.11, < 5.15.182 | ≥ 5.16, < 6.1.138 | ≥ 6.2, < 6.6.90 | ≥ 6.7, < 6.12.28 | ≥ 6.13, < 6.14.6 | 6.15:rc1 | 6.15:rc2 | 6.15:rc3 | 6.15:rc4

References (9)