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CVE-2024-26816

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…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 2.6.23 before 4.19.311
from 4.20 before 5.4.273
from 5.5 before 5.10.214
from 5.11 before 5.15.153
from 5.16 before 6.1.83
from 6.2 before 6.6.23
DebianDebian Linux
Version 10.0

Weakness classification

CWE-770

References