fkie_cve-2021-47471
Vulnerability from fkie_nvd
Published
2024-05-22 07:15
Modified
2025-04-02 15:10
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm: mxsfb: Fix NULL pointer dereference crash on unload
The mxsfb->crtc.funcs may already be NULL when unloading the driver,
in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from
mxsfb_unload() leads to NULL pointer dereference.
Since all we care about is masking the IRQ and mxsfb->base is still
valid, just use that to clear and mask the IRQ.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 5.15 | |
| linux | linux_kernel | 5.15 | |
| linux | linux_kernel | 5.15 | |
| linux | linux_kernel | 5.15 | |
| linux | linux_kernel | 5.15 | |
| linux | linux_kernel | 5.15 |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: mxsfb: Fix NULL pointer dereference crash on unload\n\nThe mxsfb-\u003ecrtc.funcs may already be NULL when unloading the driver,\nin which case calling mxsfb_irq_disable() via drm_irq_uninstall() from\nmxsfb_unload() leads to NULL pointer dereference.\n\nSince all we care about is masking the IRQ and mxsfb-\u003ebase is still\nvalid, just use that to clear and mask the IRQ."
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"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm: mxsfb: corrige el fallo de desreferencia del puntero NULL al descargar Es posible que mxsfb-\u0026gt;crtc.funcs ya sea NULL al descargar el controlador, en cuyo caso se llama a mxsfb_irq_disable() a trav\u00e9s de drm_irq_uninstall() desde mxsfb_unload() conduce a la desreferencia del puntero NULL. Dado que lo \u00fanico que nos importa es enmascarar la IRQ y mxsfb-\u0026gt;base sigue siendo v\u00e1lido, simplemente util\u00edcelo para borrar y enmascarar la IRQ."
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"id": "CVE-2021-47471",
"lastModified": "2025-04-02T15:10:48.950",
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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"published": "2024-05-22T07:15:11.847",
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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