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Red Hat: CVE-2023-3609: cls_u32 component reference counter leak if tcf_change_indev() fails (Multiple Advisories)

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Red Hat: CVE-2023-3609: cls_u32 component reference counter leak if tcf_change_indev() fails (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
07/21/2023
Created
10/11/2023
Added
10/11/2023
Modified
01/30/2025

Description

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2023-3609
  • RHSA-2023:5574
  • RHSA-2023:5621
  • RHSA-2023:5622
  • RHSA-2023:6583
  • RHSA-2023:6901
  • RHSA-2023:7077
  • RHSA-2023:7370
  • RHSA-2023:7379
  • RHSA-2023:7398
  • RHSA-2023:7410
  • RHSA-2023:7418
  • RHSA-2023:7539
  • RHSA-2023:7558
  • RHSA-2024:1250
  • RHSA-2024:1253
  • RHSA-2024:1306
View more
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