Use-after-free in Linux kernel - CVE-2023-35826

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Main Vulnerability Database Vulnerabilities #VU79471

Use-after-free in Linux kernel - CVE-2023-35826

Published: August 14, 2023


Vulnerability identifier: #VU79471
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-35826
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local  user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the cedrus_remove() function in drivers/staging/media/sunxi/cedrus/cedrus.c. A local user can trigger a use-after-free error and execute arbitrary code on the system.



Affected software

Linux kernel
Ubuntu
linux-image-virtual (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-6.2.0-27-generic-lpae (Ubuntu package)
linux-image-6.2.0-27-generic (Ubuntu package)
linux-image-6.2.0-27-generic-64k (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-6.2.0-1007-ibm (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-6.2.0-1009-oracle (Ubuntu package)
linux-image-6.2.0-1009-azure (Ubuntu package)
linux-image-6.2.0-1009-aws (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-6.2.0-1010-lowlatency-64k (Ubuntu package)
linux-image-6.2.0-1010-lowlatency (Ubuntu package)
linux-image-6.2.0-1010-kvm (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-6.2.0-1010-raspi (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-6.2.0-1011-gcp (Ubuntu package)
linux-image-gcp (Ubuntu package)

How to mitigate CVE-2023-35826

Install updates from vendor's website.

Linux kernel - update to 6.3.2
linux-image-virtual (Ubuntu package) - update to 6.2.0.27.27
linux-image-generic-lpae (Ubuntu package) - update to 6.2.0.27.27
linux-image-generic-64k (Ubuntu package) - update to 6.2.0.27.27
linux-image-generic (Ubuntu package) - update to 6.2.0.27.27
linux-image-6.2.0-27-generic-lpae (Ubuntu package) - update to 6.2.0-27.28
linux-image-6.2.0-27-generic (Ubuntu package) - update to 6.2.0-27.28
linux-image-6.2.0-27-generic-64k (Ubuntu package) - update to 6.2.0-27.28
linux-image-ibm (Ubuntu package) - update to 6.2.0.1007.7
linux-image-6.2.0-1007-ibm (Ubuntu package) - update to 6.2.0-1007.7
linux-image-azure (Ubuntu package) - update to 6.2.0.1009.9
linux-image-oracle (Ubuntu package) - update to 6.2.0.1009.9
linux-image-6.2.0-1009-oracle (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1009-azure (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1009-aws (Ubuntu package) - update to 6.2.0-1009.9
linux-image-aws (Ubuntu package) - update to 6.2.0.1009.10
linux-image-6.2.0-1010-lowlatency-64k (Ubuntu package) - update to 6.2.0-1010.10
linux-image-6.2.0-1010-lowlatency (Ubuntu package) - update to 6.2.0-1010.10
linux-image-6.2.0-1010-kvm (Ubuntu package) - update to 6.2.0-1010.10
linux-image-kvm (Ubuntu package) - update to 6.2.0.1010.10
linux-image-lowlatency (Ubuntu package) - update to 6.2.0.1010.10
linux-image-lowlatency-64k (Ubuntu package) - update to 6.2.0.1010.10
linux-image-6.2.0-1010-raspi (Ubuntu package) - update to 6.2.0-1010.12
linux-image-raspi (Ubuntu package) - update to 6.2.0.1010.13
linux-image-raspi-nolpae (Ubuntu package) - update to 6.2.0.1010.13
linux-image-6.2.0-1011-gcp (Ubuntu package) - update to 6.2.0-1011.11
linux-image-gcp (Ubuntu package) - update to 6.2.0.1011.11

External References

Related Security Bulletins