Debian: CVE-2022-49030: linux -- security update

Debian: CVE-2022-49030: linux -- security update

Severity

7

CVSS

(AV:L/AC:L/Au:S/C:C/I:C/A:C)

Published

10/23/2024

Created

10/24/2024

Added

10/23/2024

Modified

01/28/2025

Description

In the Linux kernel, the following vulnerability has been resolved: libbpf: Handle size overflow for ringbuf mmap The maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries will overflow u32 when mapping producer page and data pages. Only casting max_entries to size_t is not enough, because for 32-bits application on 64-bits kernel the size of read-only mmap region also could overflow size_t. So fixing it by casting the size of read-only mmap region into a __u64 and checking whether or not there will be overflow during mmap.

Solution(s)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2022-49030
• CVE - 2022-49030