#VU108258 Out-of-bounds read in Linux kernel - CVE-2025-37749

Vulnerability identifier: #VU108258

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-37749

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the ppp_sync_txmunge() function in drivers/net/ppp/ppp_synctty.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.6 - 6.6.87

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External links
https://git.kernel.org/stable/c/1f6eb9fa87a781d5370c0de7794ae242f1a95ee5
https://git.kernel.org/stable/c/529401c8f12ecc35f9ea5d946d5a5596cf172b48
https://git.kernel.org/stable/c/6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e
https://git.kernel.org/stable/c/99aa698dec342a07125d733e39aab4394b3b7e05
https://git.kernel.org/stable/c/aabc6596ffb377c4c9c8f335124b92ea282c9821
https://git.kernel.org/stable/c/b4c836d33ca888695b2f2665f948bc1b34fbd533
https://git.kernel.org/stable/c/b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca
https://git.kernel.org/stable/c/de5a4f0cba58625e88b7bebd88f780c8c0150997
https://git.kernel.org/stable/c/fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.88

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?