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Suggestion detail

Untriaged
Permalink CVE-2023-4208
7.8 HIGH
  • CVSS version: 3.1
  • Attack vector (AV): LOCAL
  • Attack complexity (AC): LOW
  • Privileges required (PR): LOW
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): HIGH
  • Integrity impact (I): HIGH
  • Availability impact (A): HIGH
created 6 months ago
Use-after-free in Linux kernel's net/sched: cls_u32 component

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.

References

Affected products

kernel
  • <6.5

Matching in nixpkgs

pkgs.linux-doc

Linux kernel html documentation

  • nixos-unstable -

pkgs.coq-kernel

None

  • nixos-unstable -
    • nixpkgs-unstable

pkgs.kernelshark

GUI for trace-cmd which is an interface for the Linux kernel ftrace subsystem

  • nixos-unstable -

Package maintainers