VulnerabilityPublished 8 Jun 2026Updated 30 Oct 2026

CVE-2026-46312: Linux kernel · media: videobuf2: Set vma_flags in vb2_dma_sg_mmap

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in feb34085774d7b6d09265883782160100c5aac28 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 12:49 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Patch: Available – fixed in feb34085774d7b6d09265883782160100c5aac28, feb17524aa4ec337749344be0db52b88663e25ab, b4cf91658a636618f1437beec971dec25dec28eb +3

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 5ba3f757f0592ca001266b4a6214d0332349909c, < feb34085774d7b6d09265883782160100c5aac28	Fixed in feb34085774d7b6d09265883782160100c5aac28
LinuxLinux	Affected ≥ 5ba3f757f0592ca001266b4a6214d0332349909c, < feb17524aa4ec337749344be0db52b88663e25ab	Fixed in feb17524aa4ec337749344be0db52b88663e25ab
LinuxLinux	Affected ≥ 5ba3f757f0592ca001266b4a6214d0332349909c, < b4cf91658a636618f1437beec971dec25dec28eb	Fixed in b4cf91658a636618f1437beec971dec25dec28eb
LinuxLinux	Affected ≥ 5ba3f757f0592ca001266b4a6214d0332349909c, < 7254b31a13aaa0c2c0f9ffbc335b718656117ff4	Fixed in 7254b31a13aaa0c2c0f9ffbc335b718656117ff4
LinuxLinux	Affected ≥ 5ba3f757f0592ca001266b4a6214d0332349909c, < 21fade52ab9fb13368a5709e60b0d9909197aeae	Fixed in 21fade52ab9fb13368a5709e60b0d9909197aeae
LinuxLinux	Affected ≥ 5ba3f757f0592ca001266b4a6214d0332349909c, < 1a1360264f699521e001e7739009ee3ee3c6a4f5	Fixed in 1a1360264f699521e001e7739009ee3ee3c6a4f5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and has been applied in the Linux kernel. Users and administrators should update to a kernel version that includes the fix identified by the commits listed in establishedFacts.fixedVersions. No additional mitigation actions are required beyond applying the official patch.

Description

CVE-2026-46312 addresses a vulnerability in the Linux kernel's media subsystem related to videobuf2's handling of virtual memory area (VMA) flags in the vb2_dma_sg_mmap function. The issue involved inconsistent setting of VMA flags compared to vb2_dma_contig, which could trigger warnings during mmap operations of imported dma-bufs, particularly affecting an out-of-tree Apple ISP camera capture driver. This flaw has been resolved by aligning the VMA flag settings to prevent such warnings.

Impact

The impact is primarily a kernel warning (WARN_ON) triggered during mmap operations, which could indicate improper memory handling and potentially lead to instability or crashes in affected systems using the Apple ISP camera capture driver or similar configurations. There is no indication of direct exploitation or security breach, but the warning reflects a kernel memory management inconsistency that has been corrected.

Summary

The vulnerability in the Linux kernel media subsystem concerns the videobuf2 framework's vb2_dma_sg_mmap function not setting the VMA flags VM_DONTEXPAND and VM_DONTDUMP, unlike vb2_dma_contig. This discrepancy caused a WARN_ON condition in drm_gem_mmap_obj during mmap() of imported dma-bufs, notably from an Apple ISP camera capture driver using vb2_dma_sg_memops. The fix involves setting the appropriate VMA flags in vb2_dma_sg_mmap to avoid this kernel warning and potential instability during memory mapping operations.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Oct 2026, 12:36 UTC

Technical details

References

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