CVE-2023-4207

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. When fw_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 76e42ae831991c828cffa8c37736ebfb831ad5ec.
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

History

05 Feb 2024, 19:55

Type Values Removed Values Added
References () https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html - () https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html - Mailing List, Third Party Advisory, VDB Entry

11 Jan 2024, 19:15

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html -

11 Sep 2023, 18:13

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 7.8
First Time Linux
Linux linux Kernel
Debian debian Linux
Debian
CWE CWE-416
CPE cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References (MISC) https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ec - (MISC) https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ec - Patch, Vendor Advisory
References (MISC) https://www.debian.org/security/2023/dsa-5492 - (MISC) https://www.debian.org/security/2023/dsa-5492 - Third Party Advisory
References (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ec - (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ec - Issue Tracking, Mailing List, Patch, Vendor Advisory

10 Sep 2023, 12:16

Type Values Removed Values Added
References
  • (MISC) https://www.debian.org/security/2023/dsa-5492 -

06 Sep 2023, 14:15

Type Values Removed Values Added
New CVE

Information

Published : 2023-09-06 14:15

Updated : 2024-02-05 19:55


NVD link : CVE-2023-4207

Mitre link : CVE-2023-4207

CVE.ORG link : CVE-2023-4207


JSON object : View

Products Affected

linux

  • linux_kernel

debian

  • debian_linux
CWE
CWE-416

Use After Free