PT-2024-29139 · Linux+3 · Linux Kernel+3
Published
2024-06-11
·
Updated
2026-05-26
·
CVE-2024-40918
CVSS v3.1
6.3
Medium
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to random segmentation faults in package builds on PA-RISC systems with PA8800 and PA8900 processors. These systems have a large L2 cache that requires per-page flushing for decent performance when a large range is flushed. The combined cache in these systems is also more sensitive to non-equivalent aliases than the caches in earlier systems. The majority of random segmentation faults appear to be memory corruption in memory allocated using mmap and malloc. The problem is due to two issues related to cache move-in and the present bit in PTEs being racy. The flush cache page tmpalias flush sets up its own TLB entry and inhibits cache move-in. The fix involves implementing all required flush operations using tmpalias routines, including flushes for user and kernel pages, and flushing the cache page when the accessed bit is cleared.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Ubuntu