#VU86259 Out-of-bounds write in Chrome OS - CVE-2024-25556

Vulnerability identifier: #VU86259

Vulnerability risk: Low

CVSSv4.0: 5.9 [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/E:U/U:Clear]

CVE-ID: CVE-2024-25556

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Chrome OS
Operating systems & Components / Operating system

Vendor: Google

Description

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

The vulnerability exists due to a boundary error in PhysmemCreateNewDmaBufBackedPMR. A local application can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Chrome OS: before 121.0.6167.159, 121.0.6167.159

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External links
https://chromereleases.googleblog.com/2024/02/stable-channel-update-for-chromeos.html
https://bugs.chromium.org/p/chromium/issues/detail?id=1466464

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.