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 symbols are emitted into the .notes section so that Xen can find the "startup_xen" entry point.
Does this matter?
Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.31% probability · 23th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/13edb509abc91c72152a11baaf0e7c060a312e03Patch
- https://git.kernel.org/stable/c/47635b112a64b7b208224962471e7e42f110e723Patch
- https://git.kernel.org/stable/c/52018aa146e3cf76569a9b1e6e49a2b7c8d4a088Patch
- https://git.kernel.org/stable/c/5cb59db49c9c0fccfd33b2209af4f7ae3c6ddf40Patch
- https://git.kernel.org/stable/c/a4e7ff1a74274e59a2de9bb57236542aa990d20aPatch
- https://git.kernel.org/stable/c/aaa8736370db1a78f0e8434344a484f9fd20be3bPatch
- https://git.kernel.org/stable/c/ae7079238f6faf1b94accfccf334e98b46a0c0aaPatch
- https://git.kernel.org/stable/c/af2a9f98d884205145fd155304a6955822ccca1cPatch
- https://git.kernel.org/stable/c/c7cff9780297d55d97ad068b68b703cfe53ef9afPatch
- https://git.kernel.org/stable/c/13edb509abc91c72152a11baaf0e7c060a312e03Patch
- https://git.kernel.org/stable/c/47635b112a64b7b208224962471e7e42f110e723Patch
- https://git.kernel.org/stable/c/52018aa146e3cf76569a9b1e6e49a2b7c8d4a088Patch
- https://git.kernel.org/stable/c/5cb59db49c9c0fccfd33b2209af4f7ae3c6ddf40Patch
- https://git.kernel.org/stable/c/a4e7ff1a74274e59a2de9bb57236542aa990d20aPatch
- https://git.kernel.org/stable/c/aaa8736370db1a78f0e8434344a484f9fd20be3bPatch
- https://git.kernel.org/stable/c/ae7079238f6faf1b94accfccf334e98b46a0c0aaPatch
- https://git.kernel.org/stable/c/af2a9f98d884205145fd155304a6955822ccca1cPatch
- https://git.kernel.org/stable/c/c7cff9780297d55d97ad068b68b703cfe53ef9afPatch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.