net_sched: drr: Fix double list add in class with netem as child qdisc (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.22 % · percentile 13 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
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/
Weaknesses (CWE)
- CWE-415 — Double Free
References
- https://git.kernel.org/stable/c/5da3aad1a13e7edb8ff0778a444ccf49930313e9
- https://git.kernel.org/stable/c/4b07ac06b0a712923255aaf2691637693fc7100d
- https://git.kernel.org/stable/c/2968632880f1792007eedd12eeedf7f6e2b7e9f3
- https://git.kernel.org/stable/c/4f0ecf50cdf76da95828578a92f130b653ac2fcf
- https://git.kernel.org/stable/c/db205b92dfe0501e5b92fb7cf00971d0e44ba3eb
- https://git.kernel.org/stable/c/26e75716b94d6ff9be5ea07d63675c4d189f30b4
- https://git.kernel.org/stable/c/ab2248110738d4429668140ad22f530a9ee730e1
- https://git.kernel.org/stable/c/f99a3fbf023e20b626be4b0f042463d598050c9a
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2025-15931
- GCVE · GCVE-0-2025-37915
CERT-FR advisories
- CERTFR-2026-AVI-0246 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0227 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0194 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0169 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0894 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0758 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0756 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0743 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0723 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0697 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0670 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0650 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0625 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0607 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0587 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0529 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0464 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.0.1 < 5.4.294cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.238cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.182cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.138cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.90cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.28cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.14.6cpe:2.3:o:linux:linux_kernel:5.0:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.0:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.0:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.0:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.0:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.0:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.0:rc8:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 5da3aad1a13e7edb8ff0778a444ccf49930313e9 ; affected 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 4b07ac06b0a712923255aaf2691637693fc7100d ; affected 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 2968632880f1792007eedd12eeedf7f6e2b7e9f3 ; affected 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 4f0ecf50cdf76da95828578a92f130b653ac2fcf ; affected 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < db205b92dfe0501e5b92fb7cf00971d0e44ba3eb ; affected 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 26e75716b94d6ff9be5ea07d63675c4d189f30b4 |
| Linux · Linux | affected 5.0 ; unaffected 0 < 5.0 ; unaffected 5.4.294 ≤ 5.4.* ; unaffected 5.10.238 ≤ 5.10.* ; unaffected 5.15.182 ≤ 5.15.* ; unaffected 6.1.138 ≤ 6.1.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |