CVE-2025-21971
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21971
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21971.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21971
- Downstream
- Related
- Published
- 2025-04-01T15:47:04.448Z
- Modified
- 2025-11-28T02:34:35.107996Z
- Summary
- net_sched: Prevent creation of classes with TC_H_ROOT
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netsched: Prevent creation of classes with TCH_ROOT
The function qdisctreereducebacklog() uses TCHROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created with classid TCH_ROOT, the traversal terminates prematurely at this class instead of reaching the actual root qdisc, causing parent statistics to be incorrectly maintained. In case of DRR, this could lead to a crash as reported by Mingi Cho.
Prevent the creation of any Qdisc class with classid TCHROOT (0xFFFFFFFF) across all qdisc types, as suggested by Jamal.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21971.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/003d92c91cdb5a64b25a9a74cb8543aac9a8bb48
- https://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e
- https://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7
- https://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67
- https://git.kernel.org/stable/c/7a82fe67a9f4d7123d8e5ba8f0f0806c28695006
- https://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c
- https://git.kernel.org/stable/c/e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c
- https://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21971.json
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-21971
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced066a3b5b2346febf9a655b444567b7138e3bb939Fixede05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4cFixed7a82fe67a9f4d7123d8e5ba8f0f0806c28695006Fixed003d92c91cdb5a64b25a9a74cb8543aac9a8bb48Fixede5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7Fixed78533c4a29ac3aeddce4b481770beaaa4f3bfb67Fixed5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7Fixed94edfdfb9505ab608e86599d1d1e38c83816fc1cFixed0c3057a5a04d07120b3d0ec9c79568fceb9c921e
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced2.6.25Fixed5.4.292
- Type
- ECOSYSTEM
- Events
-
Introduced5.5.0Fixed5.10.236
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.180
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.132
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.84
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.20
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.13.8