net_sched: ets: Fix double list add in class with netem as child qdisc (Linux Linux)

CVE-2025-37914
HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.23 % · percentile 14 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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/

Weaknesses (CWE)

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 < 24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea ; affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 < 554acc5a2ea9703e08023eb9a003f9e5a830a502 ; affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 < 9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990 ; affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 < 72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3 ; affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 < 1f01e9f961605eb397c6ecd1d7b0233dfbf9077c ; affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 < bc321f714de693aae06e3786f88df2975376d996
Linux · Linuxaffected 5.6 ; unaffected 0 < 5.6 ; unaffected 5.10.238 ≤ 5.10.* ; unaffected 5.15.182 ≤ 5.15.* ; unaffected 6.1.138 ≤ 6.1.* ; unaffected 6.6.90 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD