FKIE_CVE-2024-26816
Vulnerability from fkie_nvd - Published: 2024-04-10 14:15 - Updated: 2025-03-27 21:10
Severity ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| debian | debian_linux | 10.0 |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86, relocs: Ignore relocations in .notes section\n\nWhen building with CONFIG_XEN_PV=y, .text symbols are emitted into\nthe .notes section so that Xen can find the \"startup_xen\" entry point.\nThis information is used prior to booting the kernel, so relocations\nare not useful. In fact, performing relocations against the .notes\nsection means that the KASLR base is exposed since /sys/kernel/notes\nis world-readable.\n\nTo avoid leaking the KASLR base without breaking unprivileged tools that\nare expecting to read /sys/kernel/notes, skip performing relocations in\nthe .notes section. The values readable in .notes are then identical to\nthose found in System.map."
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"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: x86, relocs: ignorar reubicaciones en la secci\u00f3n .notes Al compilar con CONFIG_XEN_PV=y, los s\u00edmbolos .text se emiten en la secci\u00f3n .notes para que Xen pueda encontrar el punto de entrada \"startup_xen\" . Esta informaci\u00f3n se utiliza antes de iniciar el kernel, por lo que las reubicaciones no son \u00fatiles. De hecho, realizar reubicaciones en la secci\u00f3n .notes significa que la base KASLR est\u00e1 expuesta ya que /sys/kernel/notes es legible en todo el mundo. Para evitar filtrar la base de KASLR sin da\u00f1ar las herramientas sin privilegios que esperan leer /sys/kernel/notes, omita realizar reubicaciones en la secci\u00f3n .notes. Los valores legibles en .notes son id\u00e9nticos a los que se encuentran en System.map."
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"id": "CVE-2024-26816",
"lastModified": "2025-03-27T21:10:26.187",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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