CVE-2023-51782

Local system crash via unlocked receive queue

Published Dec 25, 2023 · Updated Aug 2, 2024

Use-after-free in the Linux kernel before 6.6.8 allows local users to crash the system through concurrent ROSE socket operations. rose_ioctl reads an skb from sk_receive_queue without its lock, while rose_accept can dequeue and free the same skb before rose_ioctl reads its length. Low-privileged local access and a ROSE socket are required; a system crash is established, while arbitrary code execution is reported but not demonstrated.

CVSS severity7.0
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel before 6.6.8 allows local users to crash the system through concurrent ROSE socket operations. rose_ioctl reads an skb from sk_receive_queue without its lock, while rose_accept can dequeue and free the same skb before rose_ioctl reads its length. Low-privileged local access and a ROSE socket are required; a system crash is established, while arbitrary code execution is reported but not demonstrated.

The record

CVE
CVE-2023-51782
Published
Dec 25, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.0NISTCVSS:3.1/AV:L/AC:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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