CVE-2024-26816

low-risk
Published 2024-04-10

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Debian Linux

References (20)

Patch https://git.kernel.org/stable/c/13edb509abc91c72152a11baaf0e7c060a312e03
Patch https://git.kernel.org/stable/c/47635b112a64b7b208224962471e7e42f110e723
Patch https://git.kernel.org/stable/c/52018aa146e3cf76569a9b1e6e49a2b7c8d4a088
Patch https://git.kernel.org/stable/c/5cb59db49c9c0fccfd33b2209af4f7ae3c6ddf40
Patch https://git.kernel.org/stable/c/a4e7ff1a74274e59a2de9bb57236542aa990d20a
Patch https://git.kernel.org/stable/c/aaa8736370db1a78f0e8434344a484f9fd20be3b
Patch https://git.kernel.org/stable/c/ae7079238f6faf1b94accfccf334e98b46a0c0aa
Patch https://git.kernel.org/stable/c/af2a9f98d884205145fd155304a6955822ccca1c
Patch https://git.kernel.org/stable/c/c7cff9780297d55d97ad068b68b703cfe53ef9af
Patch https://git.kernel.org/stable/c/13edb509abc91c72152a11baaf0e7c060a312e03
Patch https://git.kernel.org/stable/c/47635b112a64b7b208224962471e7e42f110e723
Patch https://git.kernel.org/stable/c/52018aa146e3cf76569a9b1e6e49a2b7c8d4a088
Patch https://git.kernel.org/stable/c/5cb59db49c9c0fccfd33b2209af4f7ae3c6ddf40
Patch https://git.kernel.org/stable/c/a4e7ff1a74274e59a2de9bb57236542aa990d20a
Patch https://git.kernel.org/stable/c/aaa8736370db1a78f0e8434344a484f9fd20be3b
Patch https://git.kernel.org/stable/c/ae7079238f6faf1b94accfccf334e98b46a0c0aa
Patch https://git.kernel.org/stable/c/af2a9f98d884205145fd155304a6955822ccca1c
Patch https://git.kernel.org/stable/c/c7cff9780297d55d97ad068b68b703cfe53ef9af
Mailing List https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Mailing List https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low