CVE-2026-22999

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd < 2a64fb9b47afffeb5dbab5fd3a518e1436dcc90eaffected
LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd < cff6cd703f41d8071995956142729e4bba160363affected
LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd < f06f7635499bc806cbe2bbc8805c7cef8b1edddfaffected
LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd < 0a234660dc70ce45d771cbc76b20d925b73ec160affected
LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd < 362e269bb03f7076ba9990e518aeddb898232e50affected
LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd < e9d8f11652fa08c647bf7bba7dd8163241a332cdaffected
LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd < 3879cffd9d07aa0377c4b8835c4f64b4fb24ac78affected
LinuxLinux3.8affected
LinuxLinux0 < 3.8unaffected
LinuxLinux5.10.249 <= 5.10.*unaffected
LinuxLinux5.15.199 <= 5.15.*unaffected
LinuxLinux6.1.162 <= 6.1.*unaffected
LinuxLinux6.6.122 <= 6.6.*unaffected
LinuxLinux6.12.67 <= 6.12.*unaffected
LinuxLinux6.18.7 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References