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CVE-2023-3776

CVSS v3.1 7.8 (High)
78% Progress
EPSS 0.04 % (5th)
0.04% Progress
Affected Products 2
Advisories 80
NVD Status Analyzed
Info CVSS EPSS Affected Configurations References Security Advisories Packages & Software Tools, Exploits & PoC Graph Web & Social Timeline

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.

If tcf_change_indev() fails, fw_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 0323bce598eea038714f941ce2b22541c46d488f.

Weaknesses
CWE-416
Use After Free
CVE Status
PUBLISHED
NVD Status
Analyzed
CNA
Google Inc.
Published Date
2023-07-21 21:15:11
(14 months ago)
Updated Date
2024-08-22 20:24:45
(3 weeks ago)

Affected Products

Debian

Linux

Configuration #1

    CPE23 From Up To
  Linux Kernel from 2.6.12 version and prior 4.14.322 version cpe:2.3:o:linux:linux_kernel >= 2.6.12 < 4.14.322
  Linux Kernel from 4.15 version and prior 4.19.291 version cpe:2.3:o:linux:linux_kernel >= 4.15 < 4.19.291
  Linux Kernel from 4.20 version and prior 5.4.251 version cpe:2.3:o:linux:linux_kernel >= 4.20 < 5.4.251
  Linux Kernel from 5.5 version and prior 5.10.188 version cpe:2.3:o:linux:linux_kernel >= 5.5 < 5.10.188
  Linux Kernel from 5.11 version and prior 5.15.121 version cpe:2.3:o:linux:linux_kernel >= 5.11 < 5.15.121
  Linux Kernel from 5.16 version and prior 6.1.40 version cpe:2.3:o:linux:linux_kernel >= 5.16 < 6.1.40
  Linux Kernel from 6.2 version and prior 6.4.5 version cpe:2.3:o:linux:linux_kernel >= 6.2 < 6.4.5
  Linux Kernel 6.5 Rc1 cpe:2.3:o:linux:linux_kernel:6.5:rc1

Configuration #2

    CPE23 From Up To
  Debian Linux 10.0 cpe:2.3:o:debian:debian_linux:10.0
  Debian Linux 11.0 cpe:2.3:o:debian:debian_linux:11.0
  Debian Linux 12.0 cpe:2.3:o:debian:debian_linux:12.0