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CVE-2026-22999

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0b38aa6f04fd1d2fb45345e45793101bff59fa63f46dbc517d33f4fdca992114
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["net/sched/sch_qfq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.8"},{"lessThan":"3.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.249","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.199","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.162","versionType":"semver"},{"lessThanOrE…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sched/sch_qfq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e","status":"affected","version":"462dbc9101acd38e92eda93c0726857517a24bbd","versionType":"git"},{"lessThan":"cff6cd703f41d8071995956142729e4bba160363","status":"affected","version":"462dbc9101acd38e92eda93c0726857517a24bbd","versionType":"git"},{"lessThan":"f06f7635499bc806cbe2bbc8805c7cef8b1edddf","status":"affected","version":"462dbc9101acd38e92eda93c07…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["net/sched/sch_qfq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.8"},{"lessThan":"3.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.249","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.199","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.162","versionType":"semver"},{"lessThanOrE…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sched/sch_qfq.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e","status":"affected","version":"462dbc9101acd38e92eda93c0726857517a24bbd","versionType":"git"},{"lessThan":"cff6cd703f41d8071995956142729e4bba160363","status":"affected","version":"462dbc9101acd38e92eda93c0726857517a24bbd","versionType":"git"},{"lessThan":"f06f7635499bc806cbe2bbc8805c7cef8b1edddf","status":"affected","version":"462dbc9101acd38e92eda93c07…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/metrics/0/cvssV3_1

Source references

7 source assertions
{"url":"https://git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddf"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67c912555deee559184fae7b8dab52aa8c1ef5a8d3e9b7ea5399f0f683a75018 · sha256:fa9537f813e90104… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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