Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — drm/fbdev-dma: Add shadow buffering for deferred I/O
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0020 10.4 —
AFFECTED
Product Versions Fixed
Linux 5ab91447aa13b8b98bc11f5326f33500b0ee2c48 – —
Linux 6.11 – 6.12.36
TIMELINE
Mar 6 Reserved by Linux
Mar 27 Published (CNA: Linux)
Aug 4 RESCORED — CVE-2024-58091 (Linux). CVSS 7.8 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
drm/fbdev-dma: Add shadow buffering for deferred I/O
DMA areas are not necessarily backed by struct page, so we cannot
rely on it for deferred I/O. Allocate a shadow buffer for drivers
that require deferred I/O and use it as framebuffer memory.
Fixes driver errors about being "Unable to handle kernel NULL pointer
dereference at virtual address" or "Unable to handle kernel paging
request at virtual address".
The patch splits drm_fbdev_dma_driver_fbdev_probe() in an initial
allocation, which creates the DMA-backed buffer object, and a tail
that sets up the fbdev data structures. There is a tail function for
direct memory mappings and a tail function for deferred I/O with
the shadow buffer.
It is no longer possible to use deferred I/O without shadow buffer.
It can be re-added if there exists a reliably test for usable struct
page in the allocated DMA-backed buffer object.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| March 6, 2025 | Reserved | Reserved by Linux |
| March 27, 2025 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2024-58091 (Linux). CVSS 7.8 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | 5ab91447aa13b8b98bc11f5326f33500b0ee2c48 | — |
| Linux | Linux | — | 6.11 | 6.12.36 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-58091 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.