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NVD / CVE Program· CNA Linux

CVE-2026-46209: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 11427ad6c9f0def5ce567982b785da3191946430, 1a17ea9861e89585361caa8bc231bd22dc6dbe7d, 1da4ab7189f1064b3b712b388772c008b4d82580; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 11427ad6c9f0def5ce567982b785da3191946430, 1a17ea9861e89585361caa8bc231bd22dc6dbe7d, 1da4ab7189f1064b3b712b388772c008b4d82580; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() drm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions using plain integer division: unsigned int width = mode_cmd->width / (i ? info->hsub : 1); unsigned int height = mode_cmd->height / (i ? info->vsub : 1); However, the ioctl-level framebuffer_check() in drm_framebuffer.c uses drm_format_info_plane_width/height() which round up dimensions via DIV_ROUND_UP(). This inconsistency corrupts the subsequent GEM object size check for certain pixel format and dimension combinations. For example, with NV12 (vsub=2) and a 1-pixel-tall framebuffer the GEM size validation path sees height=0 instead of height=1. The expression (height - 1) then wraps to UINT_MAX as an unsigned int, causing min_size to overflow and wrap back to a small value. A tiny GEM object therefore passes the size guard, yet when the GPU accesses the chroma plane it will read or write memory beyond the object's bounds. Fix by replacing the open-coded divisions with drm_format_info_plane_width() and drm_format_info_plane_height(), which use DIV_ROUND_UP() and match the calculation already used in framebuffer_check().

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 28, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.14 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.140
  • linux linux kernel6.7 and later · before 6.12.90
  • linux linux kernel6.13 and later · before 6.18.32
  • linux linux kernel6.19 and later · before 7.0.9
  • linux linux kernel7.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.14affected
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before 11427ad6c9f0def5ce567982b785da3191946430affected · git
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before adfc5ba4ef4dd2bca5969f40e8fc7b41fb3902adaffected · git
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before 22922f7dae74409fc4bf0f1142710cb6b8ce8cc2affected · git
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before 6b992591e04f2cce813bcf239b354f375bbf84d3affected · git
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before 1da4ab7189f1064b3b712b388772c008b4d82580affected · git
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before 1a17ea9861e89585361caa8bc231bd22dc6dbe7daffected · git
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before c5fc49d8470c5ebf3b41607600f277158f159950affected · git
    • 4c3dbb2c312c9fafbac30d98c523b8b1f3455d78 and later · before 3d4c2268bd7243c3780fe32bf24ff876da272acfaffected · git
    • before 4.14not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.30.1.el10_26.12.0-211.30.1.el10_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-46201May 28, 2026 · drm/xe: Fix dma-buf attachment leak in xe_gem_prime_import()
    31Monitor
  • ← EarlierCVE-2026-46204May 28, 2026 · drm/amdgpu/vcn4: Prevent OOB reads when parsing IB
    28Monitor
  • Later →CVE-2026-46210May 28, 2026 · media: iris: fix use-after-free of fmt_src during MBPF check
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux11427ad6c9f0def5ce567982b785da3191946430Vendor (CNA)
Linux Linux1a17ea9861e89585361caa8bc231bd22dc6dbe7dVendor (CNA)
Linux Linux1da4ab7189f1064b3b712b388772c008b4d82580Vendor (CNA)
Linux Linux22922f7dae74409fc4bf0f1142710cb6b8ce8cc2Vendor (CNA)
Linux Linux3d4c2268bd7243c3780fe32bf24ff876da272acfVendor (CNA)
Linux Linux6b992591e04f2cce813bcf239b354f375bbf84d3Vendor (CNA)
Linux Linuxadfc5ba4ef4dd2bca5969f40e8fc7b41fb3902adVendor (CNA)
Linux Linuxc5fc49d8470c5ebf3b41607600f277158f159950Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.141.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-core6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-core6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-core6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-64k-devel-matched6.12.0-211.30.1.el10_2 · AlmaLinux:10Package registry (OSV)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-debuginfo0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:kernel-debug-devel0:6.12.0-211.30.1.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)

+5

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records