CVE-2025-40083
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: sch_qfq: Fix null-deref in agg_dequeue
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix null-deref in agg_dequeue To prevent a potential crash in agg_dequeue (net/sched/sch_qfq.c) when cl->qdisc->ops->peek(cl->qdisc) returns NULL, we check the return value before using it, similar to the existing approach in sch_hfsc.c. To avoid code duplication, the following changes are made: 1. Changed qdisc_warn_nonwc(include/net/pkt_sched.h) into a static inline function. 2. Moved qdisc_peek_len from net/sched/sch_hfsc.c to include/net/pkt_sched.h so that sch_qfq can reuse it. 3. Applied qdisc_peek_len in agg_dequeue to avoid crashing.
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) |
|---|---|---|---|---|---|
| 462dbc9101acd38e92eda93c0726857517a24bbd | affected | git | 71d84658a61322e5630c85c5388fc25e4a2d08b2 | Unavailable | None listed |
| 462dbc9101acd38e92eda93c0726857517a24bbd | affected | git | 99fc137f178797204d36ac860dd8b31e35baa2df | Unavailable | None listed |
| 462dbc9101acd38e92eda93c0726857517a24bbd | affected | git | 1bed56f089f09b465420bf23bb32985c305cfc28 | Unavailable | None listed |
| 462dbc9101acd38e92eda93c0726857517a24bbd | affected | git | 3c2a8994807623c7655ece205667ae2cf74940aa | Unavailable | None listed |
| 462dbc9101acd38e92eda93c0726857517a24bbd | affected | git | 6ffa9d66187188e3068b5a3895e6ae1ee34f9199 | Unavailable | None listed |
| 462dbc9101acd38e92eda93c0726857517a24bbd | affected | git | 6ff8e74c8f8a68ec07ef837b95425dfe900d060f | Unavailable | None listed |
| 462dbc9101acd38e92eda93c0726857517a24bbd | affected | git | dd831ac8221e691e9e918585b1003c7071df0379 | 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) |
|---|---|---|---|---|---|
| 3.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.8 | Unavailable | None listed |
| 5.4.302 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.247 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.197 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.159 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.116 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.57 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.16 | unaffected | original_commit_for_fix | Unavailable | * | None listed |