#VU76098 Out-of-bounds write in Linux kernel
Vulnerability identifier: #VU76098
Vulnerability risk: Low
CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-787
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor:
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the qfq_change_class() function in net/sched/sch_qfq.c when handling the MTU value provided to the QFQ Scheduler. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
External links
http://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0d
http://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13
http://www.spinics.net/lists/stable-commits/msg294885.html
http://www.debian.org/security/2023/dsa-5402
http://www.zerodayinitiative.com/advisories/ZDI-24-593/
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.
