Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-43248: vhost: move vdpa group bound check to vhost_vdpa

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: 0.16% (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 406db68f9cb976a8ddfafd631197264f2307e9c9, 566899af053246406f2faf931044d2b0af8f34d2, 69ec8dd6696069c2f18430d0e05f81d604484ee8; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 406db68f9cb976a8ddfafd631197264f2307e9c9, 566899af053246406f2faf931044d2b0af8f34d2, 69ec8dd6696069c2f18430d0e05f81d604484ee8; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes 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: vhost: move vdpa group bound check to vhost_vdpa Remove duplication by consolidating these here. This reduces the posibility of a parent driver missing them. While we're at it, fix a bug in vdpa_sim where a valid ASID can be assigned to a group equal to ngroups, causing an out of bound write.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 5th 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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-43248

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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 kernel5.19 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

    • 5.19affected
    • bda324fd037a6b0d44da5699574ce741ca161bc4 and later · before 69ec8dd6696069c2f18430d0e05f81d604484ee8affected · git
    • bda324fd037a6b0d44da5699574ce741ca161bc4 and later · before 566899af053246406f2faf931044d2b0af8f34d2affected · git
    • bda324fd037a6b0d44da5699574ce741ca161bc4 and later · before ddb57354634b6ba851b79da45f1de42c646f27d0affected · git
    • bda324fd037a6b0d44da5699574ce741ca161bc4 and later · before 7441d35d14d9a3d66d925d90cb73c75394e6d454affected · git
    • bda324fd037a6b0d44da5699574ce741ca161bc4 and later · before 406db68f9cb976a8ddfafd631197264f2307e9c9affected · git
    • bda324fd037a6b0d44da5699574ce741ca161bc4 and later · before cd025c1e876b4e262e71398236a1550486a73edeaffected · git
    • before 5.19not affected · semver
    • 6.1.191 and later · up to and including 6.1.*not affected · semver
    • 6.6.160 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.55.1.el10_26.12.0-211.55.1.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-2026-43243May 6, 2026 · drm/amd/display: Add signal type check for dcn401 get_phyd32clk_src
    22Monitor
  • ← EarlierCVE-2026-43244May 6, 2026 · kcm: fix zero-frag skb in frag_list on partial sendmsg error
    22Monitor
  • Later →CVE-2026-43249May 6, 2026 · 9p/xen: protect xen_9pfs_front_free against concurrent calls
    35Monitor

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 Linux406db68f9cb976a8ddfafd631197264f2307e9c9Vendor (CNA)
Linux Linux566899af053246406f2faf931044d2b0af8f34d2Vendor (CNA)
Linux Linux69ec8dd6696069c2f18430d0e05f81d604484ee8Vendor (CNA)
Linux Linux7441d35d14d9a3d66d925d90cb73c75394e6d454Vendor (CNA)
Linux Linuxcd025c1e876b4e262e71398236a1550486a73edeVendor (CNA)
Linux Linuxddb57354634b6ba851b79da45f1de42c646f27d0Vendor (CNA)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
almalinux:kernel5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.12.85-1 · Debian:13Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-687.48.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+9

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 (5 more)

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

All records