High
net/sched: sch_qfq: do not free existing class in qfq_change_class()
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: do not free existing class in qfq_change_class() Fixes qfq_change_class() error case. cl->qdisc and cl should only be freed if a new class and qdisc were allocated, or we risk various UAF.
Announced Source revision 1
Original source ↗CVE-2026-22999
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-22999
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "462dbc9101acd38e92eda93c0726857517a24bbd",
"lessThan": "2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e",
"versionType": "git"
},
{
"status": "affected",
"version": "462dbc9101acd38e92eda93c0726857517a24bbd",
"lessThan": "cff6cd703f41d8071995956142729e4bba160363",
"versionType": "git"
},
{
"status": "affected",
"version": "462dbc9101acd38e92eda93c0726857517a24bbd",
"lessThan": "f06f7635499bc806cbe2bbc8805c7cef8b1edddf",
"versionType": "git"
},
{
"status": "affected",
"version": "462dbc9101acd38e92eda93c0726857517a24bbd",
"lessThan": "0a234660dc70ce45d771cbc76b20d925b73ec160",
"versionType": "git"
},
{
"status": "affected",
"version": "462dbc9101acd38e92eda93c0726857517a24bbd",
"lessThan": "362e269bb03f7076ba9990e518aeddb898232e50",
"versionType": "git"
},
{
"status": "affected",
"version": "462dbc9101acd38e92eda93c0726857517a24bbd",
"lessThan": "e9d8f11652fa08c647bf7bba7dd8163241a332cd",
"versionType": "git"
},
{
"status": "affected",
"version": "462dbc9101acd38e92eda93c0726857517a24bbd",
"lessThan": "3879cffd9d07aa0377c4b8835c4f64b4fb24ac78",
"versionType": "git"
}
],
"programFiles": [
"net/sched/sch_qfq.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.249",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.67",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.7",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sched/sch_qfq.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-22999
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #39724 · Revision 1
- Added to Heist Feed
- Publisher date