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CVE-2025-38449 is a reference-counting vulnerability in the Linux kernel DRM/GEM subsystem. A GEM handle can be released while its GEM buffer object remains attached to a DRM framebuffer, prematurely releasing the backing dma-buf. Subsequent modesetting or page-flip operations can access the released object and cause a kernel segmentation fault, including in dma_buf_vmap(). Drivers using shadow planes to map dma-bufs during page flips trigger the fault particularly easily. The fix retains GEM-handle references for the framebuffer's lifetime and releases them during framebuffer cleanup.
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No public exploit code observed for this vulnerability.
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25 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A reference-counting flaw in the Linux kernel's DRM/GEM subsystem allows a framebuffer's backing dma-buf to be released prematurely, causing a segmentation fault during subsequent display mode-setting operations. The advisory rates the vulnerability as medium severity, with CVSS v3 scoring of 5.5 and a local, low-privilege attack vector affecting availability. The fix retains GEM handle references until framebuffer cleanup. The prescribed remediation is to update sys-kernel/csql-kernel-6_1 and related packages to version 18613.339.70 or later.
A Linux kernel DRM/GEM vulnerability involving framebuffer GEM-handle reference acquisition. The notice assigns it a CVSS v3 local attack vector requiring low privileges and notes available exploits.
A locally exploitable vulnerability requiring low privileges that can cause a high availability impact, with no stated confidentiality or integrity impact.
Linux kernel DRM/GEM framebuffer reference-management flaw.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.