CVE-2024-26816

MEDIUM

Linux Kernel - KASLR Base Leak via .notes Section Relocations

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: x86, relocs: Ignore relocations in .notes section When building with CONFIG_XEN_PV=y, .text symbols are emitted into the .notes section so that Xen can find the "startup_xen" entry point. This information is used prior to booting the kernel, so relocations are not useful. In fact, performing relocations against the .notes section means that the KASLR base is exposed since /sys/kernel/notes is world-readable. To avoid leaking the KASLR base without breaking unprivileged tools that are expecting to read /sys/kernel/notes, skip performing relocations in the .notes section. The values readable in .notes are then identical to those found in System.map.

Scores

CVSS v3 5.5
EPSS 0.0002
EPSS Percentile 6.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (30)
debian/debian_linux 10.0
linux/Kernel 2.6.23 - 4.19.311linux
linux/Kernel 4.20.0 - 5.4.273linux
linux/Kernel 5.11.0 - 5.15.153linux
linux/Kernel 5.16.0 - 6.1.83linux
linux/Kernel 5.5.0 - 5.10.214linux
linux/Kernel 6.2.0 - 6.6.23linux
linux/Kernel 6.7.0 - 6.7.11linux
linux/Kernel 6.8.0 - 6.8.2linux
Linux/Linux < 2.6.23
... and 20 more
Published Apr 10, 2024
Tracked Since Feb 18, 2026