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CVE-2024-26816

Disclosure Date: April 10, 2024
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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.

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CVSS V3 Severity and Metrics
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Impact Score:
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Vector:
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Attack Vector (AV):
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Attack Complexity (AC):
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Integrity (I):
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Availability (A):
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General Information

Vendors

  • Linux

Products

  • Linux
Technical Analysis