CVE-2025-21971
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net_sched: Prevent creation of classes with TC_H_ROOT
In the Linux kernel, the following vulnerability has been resolved: net_sched: Prevent creation of classes with TC_H_ROOT The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created with classid TC_H_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 TC_H_ROOT (0xFFFFFFFF) across all qdisc types, as suggested by Jamal.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c | Unavailable | None listed |
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | 7a82fe67a9f4d7123d8e5ba8f0f0806c28695006 | Unavailable | None listed |
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | 003d92c91cdb5a64b25a9a74cb8543aac9a8bb48 | Unavailable | None listed |
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7 | Unavailable | None listed |
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | 78533c4a29ac3aeddce4b481770beaaa4f3bfb67 | Unavailable | None listed |
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | 5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7 | Unavailable | None listed |
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | 94edfdfb9505ab608e86599d1d1e38c83816fc1c | Unavailable | None listed |
| 066a3b5b2346febf9a655b444567b7138e3bb939 | affected | git | 0c3057a5a04d07120b3d0ec9c79568fceb9c921e | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.25 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.25 | Unavailable | None listed |
| 5.4.292 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.236 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.180 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.132 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.84 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.20 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.8 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |