CVE-2024-43873

Incorrect SEQPACKET authorization via uninitialized state

Published Aug 21, 2024 · Updated May 11, 2026

Improper initialization in affected Linux kernel releases allows local users to trigger incorrect vhost/vsock SEQPACKET permission decisions. The vhost_vsock allocation path leaves seqpacket_allow unset, while set_features fails to clear it after VIRTIO_VSOCK_F_SEQPACKET is removed. Published assessments require local low-privileged access; upstream material identifies incorrect socket eligibility but no more specific consequence.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in affected Linux kernel releases allows local users to trigger incorrect vhost/vsock SEQPACKET permission decisions. The vhost_vsock allocation path leaves seqpacket_allow unset, while set_features fails to clear it after VIRTIO_VSOCK_F_SEQPACKET is removed. Published assessments require local low-privileged access; upstream material identifies incorrect socket eligibility but no more specific consequence.

The record

CVE
CVE-2024-43873
Published
Aug 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-909
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.14
  2. Affected versionversion=ced7b713711fdd8f99d8d04dc53451441d194c60 <1e1fdcbdde3b7663e5d8faeb2245b9b151417d22
  3. Affected versionversion=ced7b713711fdd8f99d8d04dc53451441d194c60 <3062cb100787a9ddf45de30004b962035cd497fb
  4. Affected versionversion=ced7b713711fdd8f99d8d04dc53451441d194c60 <30bd4593669443ac58515e23557dc8cef70d8582
  5. Affected versionversion=ced7b713711fdd8f99d8d04dc53451441d194c60 <ea558f10fb05a6503c6e655a1b7d81fdf8e5924c
  6. Affected versionversion=ced7b713711fdd8f99d8d04dc53451441d194c60 <eab96e8716cbfc2834b54f71cc9501ad4eec963b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=ced7b713711fdd8f99d8d04dc53451441d194c60 <1e1fdcbdde3b7663e5d8faeb2245b9b151417d22; version=ced7b713711fdd8f99d8d04dc53451441d194c60 <3062cb100787a9ddf45de30004b962035cd497fb; version=ced7b713711fdd8f99d8d04dc53451441d194c60 <30bd4593669443ac58515e23557dc8cef70d8582; version=ced7b713711fdd8f99d8d04dc53451441d194c60 <ea558f10fb05a6503c6e655a1b7d81fdf8e5924c; version=ced7b713711fdd8f99d8d04dc53451441d194c60 <eab96e8716cbfc2834b54f71cc9501ad4eec963b

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-909Missing Initialization of Resource

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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