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CVE-2026-22999

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, and 1 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 462dbc9101acd38e92eda93c0726857517a24bbd · fixed in 2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e; From 462dbc9101acd38e92eda93c0726857517a24bbd · fixed in cff6cd703f41d8071995956142729e4bba160363; From 462dbc9101acd38e92eda93c0726857517a24bbd · fixed in f06f7635499bc806cbe2bbc8805c7cef8b1edddf; From 462dbc9101acd38e92eda93c0726857517a24bbd · fixed in 0a234660dc70ce45d771cbc76b20d925b73ec160; From 462dbc9101acd38e92eda93c0726857517a24bbd · fixed in 362e269bb03f7076ba9990e518aeddb898232e50; From 462dbc9101acd38e92eda93c0726857517a24bbd · fixed in e9d8f11652fa08c647bf7bba7dd8163241a332cd; From 462dbc9101acd38e92eda93c0726857517a24bbd · fixed in 3879cffd9d07aa0377c4b8835c4f64b4fb24ac78

  • Linux Linux

    3.8

  • KernelLinux

    From 3.8.0 · fixed in 5.10.249; From 5.11.0 · fixed in 5.15.199; From 5.16.0 · fixed in 6.1.162; From 6.2.0 · fixed in 6.6.122; From 6.7.0 · fixed in 6.12.67; From 6.13.0 · fixed in 6.18.7

References 7

git.kernel.org