Vulnerability-Lookup

FKIE_CVE-2026-22999

Vulnerability from fkie_nvd - Published: 2026-01-25 15:15 - Updated: 2026-02-26 17:02

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddf	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

To clipboard

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          "confidentialityImpact": "NONE",
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CVE-2026-22999 (GCVE-0-2026-22999)

Vulnerability from cvelistv5 – Published: 2026-01-25 14:36 – Updated: 2026-02-09 08:36

Title

net/sched: sch_qfq: do not free existing class in qfq_change_class()

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2a64fb9b47afffeb5…
	https://git.kernel.org/stable/c/cff6cd703f41d8071…
	https://git.kernel.org/stable/c/f06f7635499bc806c…
	https://git.kernel.org/stable/c/0a234660dc70ce45d…
	https://git.kernel.org/stable/c/362e269bb03f7076b…
	https://git.kernel.org/stable/c/e9d8f11652fa08c64…
	https://git.kernel.org/stable/c/3879cffd9d07aa037…

Impacted products

Vendor

Product

Version

Linux

Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < 2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < cff6cd703f41d8071995956142729e4bba160363 (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < f06f7635499bc806cbe2bbc8805c7cef8b1edddf (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < 0a234660dc70ce45d771cbc76b20d925b73ec160 (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < 362e269bb03f7076ba9990e518aeddb898232e50 (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < e9d8f11652fa08c647bf7bba7dd8163241a332cd (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < 3879cffd9d07aa0377c4b8835c4f64b4fb24ac78 (git)

Linux

Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.67 , ≤ 6.12.* (semver)
Unaffected: 6.18.7 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-22999

CVE-2026-22999 (GCVE-0-2026-22999)

Tags

Sightings

Nomenclature