CVE-2026-52917

Kernel-memory disclosure via stale SCTP association race

Published Jun 24, 2026 · Updated Jun 24, 2026

An out-of-bounds read in SCTP diagnostics in affected Linux Kernel releases allows local users to disclose memory or crash the system. An exact sock_diag lookup can retain an SCTP transport reference while waiting for the socket lock, then format association state after teardown has freed its bind-address list. Exploitation requires local low-privilege access and a successful teardown race; the resulting read can expose unrelated kernel memory or interrupt the system.

CVSS severity7.1
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in SCTP diagnostics in affected Linux Kernel releases allows local users to disclose memory or crash the system. An exact sock_diag lookup can retain an SCTP transport reference while waiting for the socket lock, then format association state after teardown has freed its bind-address list. Exploitation requires local low-privilege access and a successful teardown race; the resulting read can expose unrelated kernel memory or interrupt the system.

The record

CVE
CVE-2026-52917
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=4.7
  2. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <480f754580b5686b928977d16a59f20cef83ff01
  3. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <5425de8bd6e9fe5bd67d158e3348171ae7510117
  4. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <5eba3e48d78edd7551b992cb7ba687019b3a78da
  5. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <6657af827e21883ae90693e42e7f59a6aab690b5
  6. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <78c4f964b2f94e405721c093773f6250e1e676b2
  7. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <b2be72d401833194917e44fbd8d8144bb4f2db16
  8. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <e97c2a535e23ed0fdd2660993fb3f10d9535c9bc
  9. Affected versionversion=8f840e47f190cbe61a96945c13e9551048d42cef <f5af203dec6e0e7a6090fcc2130e9f3901bfc84d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.7; version=8f840e47f190cbe61a96945c13e9551048d42cef <480f754580b5686b928977d16a59f20cef83ff01; version=8f840e47f190cbe61a96945c13e9551048d42cef <5425de8bd6e9fe5bd67d158e3348171ae7510117; version=8f840e47f190cbe61a96945c13e9551048d42cef <5eba3e48d78edd7551b992cb7ba687019b3a78da; version=8f840e47f190cbe61a96945c13e9551048d42cef <6657af827e21883ae90693e42e7f59a6aab690b5; version=8f840e47f190cbe61a96945c13e9551048d42cef <78c4f964b2f94e405721c093773f6250e1e676b2; version=8f840e47f190cbe61a96945c13e9551048d42cef <b2be72d401833194917e44fbd8d8144bb4f2db16; version=8f840e47f190cbe61a96945c13e9551048d42cef <e97c2a535e23ed0fdd2660993fb3f10d9535c9bc; version=8f840e47f190cbe61a96945c13e9551048d42cef <f5af203dec6e0e7a6090fcc2130e9f3901bfc84d

Published CVSS scores

7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-125Out-of-bounds Read

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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