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CVE-2023-3609 (GCVE-0-2023-3609)

Vulnerability from cvelistv5 – Published: 2023-07-21 20:47 – Updated: 2026-07-30 16:34
VLAI
Title
Use-after-free in Linux kernel's net/sched: cls_u32 component
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-05 18:36 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Kernel Affected: 4.14.0 , < 4.14.322 (semver)
Affected: 4.15.0 , < 4.19.291 (semver)
Affected: 4.20.0 , < 5.4.248 (semver)
Affected: 5.5.0 , < 5.10.185 (semver)
Affected: 5.11.0 , < 5.15.118 (semver)
Affected: 5.16.0 , < 6.1.35 (semver)
Affected: 6.2.0 , < 6.3.9 (semver)
Unaffected: 6.4.0 (semver)
Unaffected: 04c55383fa5689357bcdd2c8036725a55ed632bc (git)
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2023-06-09 10:40
Show details on NVD website
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}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.