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NVD / CVE Program· CNA Linux

CVE-2026-43206: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

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: 0.13% (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 3e04bc310d80b46eaf481f1fefcbcb37a187412d, 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940, 4e72f419e4ed44cb3b60506752d8688c20a60a9b.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 3e04bc310d80b46eaf481f1fefcbcb37a187412d, 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940, 4e72f419e4ed44cb3b60506752d8688c20a60a9b 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/amdkfd: Fix out-of-bounds write in kfd_event_page_set() The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without checking the buffer size parameter. This allows unprivileged userspace to trigger an out-of bounds kernel memory write by passing a small buffer, leading to potential privilege escalation.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Nov 11, 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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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • 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 kernel4.17 and later · before 5.10.252
  • linux linux kernel5.11 and later · before 5.15.202
  • linux linux kernel5.16 and later · before 6.1.165
  • linux linux kernel6.2 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.16
  • linux linux kernel6.19 and later · before 6.19.6

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

    • 4.17affected
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before 3e04bc310d80b46eaf481f1fefcbcb37a187412daffected · git
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781faffected · git
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before b4034442cb090e4a980bdcc1540948606cbc951baffected · git
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940affected · git
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before 75fb57efdd7863fffbc39db23e9cad7aafda26edaffected · git
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before bfcd6b53e1f4feb182952f4ff9a137c36ceaf20baffected · git
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before 4e72f419e4ed44cb3b60506752d8688c20a60a9baffected · git
    • 0fc8011f89feb8b2c3008583b777d097e1974660 and later · before 8a70a26c9f34baea6c3199a9862ddaff4554a96daffected · git
    • before 4.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.49.1.el10_26.12.0-211.49.1.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-2026-43204May 6, 2026 · ASoC: qcom: q6asm: drop DSP responses for closed data streams
    22Monitor
  • ← EarlierCVE-2026-43205May 6, 2026 · dpaa2-switch: validate num_ifs to prevent out-of-bounds write
    31Monitor
  • Later →CVE-2026-43207May 6, 2026 · media: mtk-mdp: Fix error handling in probe function
    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 Linux3e04bc310d80b46eaf481f1fefcbcb37a187412dVendor (CNA)
Linux Linux4857c37c7ba9aa38b9a4c694e8bd8d0091c87940Vendor (CNA)
Linux Linux4e72f419e4ed44cb3b60506752d8688c20a60a9bVendor (CNA)
Linux Linux75fb57efdd7863fffbc39db23e9cad7aafda26edVendor (CNA)
Linux Linux8a70a26c9f34baea6c3199a9862ddaff4554a96dVendor (CNA)
Linux Linuxb4034442cb090e4a980bdcc1540948606cbc951bVendor (CNA)
Linux Linuxbfcd6b53e1f4feb182952f4ff9a137c36ceaf20bVendor (CNA)
Linux Linuxde8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781fVendor (CNA)
almalinux:bpftool4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.156.1.el8_10 · AlmaLinux:8Package registry (OSV)
alpine:docker29.5.1-r0 · Alpine:v3.23Package registry (OSV)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.156.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+18

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 (7 more)

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

All records