CVE-2021-29155 log

Severity Medium
Remote No
Type Information disclosure
An issue has been discovered in the Linux kernel before version 5.11.16 in the mechanism to mitigate speculatively out-of-bounds loads (Spectre mitigation). Unprivileged BPF programs running on affected systems can bypass the protection and execute speculatively out-of-bounds loads from the kernel memory. This can be abused to extract the contents of the kernel memory via a side-channel. The identified gap is that when protecting sequences of pointer arithmetic operations against speculatively out-of-bounds loads, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.
Group Package Affected Fixed Severity Status Ticket
AVG-1854 linux-lts 5.10.31-1 5.10.32-1 Medium Fixed
AVG-1853 linux-zen 5.11.15.zen1-2 5.11.16.zen1-1 Medium Fixed
AVG-1852 linux-hardened 5.11.15.hardened1-1 5.11.16.hardened1-1 Medium Fixed
AVG-1851 linux 5.11.15.arch1-2 5.11.16.arch1-1 Medium Fixed