CVE-2024-57982

Kernel-memory disclosure via inconsistent XFRM hash state

Published Feb 27, 2025 · Updated Aug 5, 2026

An out-of-bounds read in affected Linux kernel releases starting at 4.9 allows local users to read kernel memory during XFRM state lookup. The XFRM rehash path replaces state_bydst before updating state_hmask, so an RCU lookup can hash with the new mask while indexing the old, smaller hlist array. Low-privileged local access and a lookup racing a state-table resize are required; the resulting read can disclose kernel data or interrupt the system.

CVSS severity7.1
High
EPSS probability0.24%
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 affected Linux kernel releases starting at 4.9 allows local users to read kernel memory during XFRM state lookup. The XFRM rehash path replaces state_bydst before updating state_hmask, so an RCU lookup can hash with the new mask while indexing the old, smaller hlist array. Low-privileged local access and a lookup racing a state-table resize are required; the resulting read can disclose kernel data or interrupt the system.

The record

CVE
CVE-2024-57982
Published
Feb 27, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.9
  2. Affected versionversion=c2f672fc94642bae96821a393f342edcfa9794a6 <a16871c7832ea6435abb6e0b58289ae7dcb7e4fc
  3. Affected versionversion=c2f672fc94642bae96821a393f342edcfa9794a6 <b86dc510308d7a8955f3f47a4fea4bef887653e4
  4. Affected versionversion=c2f672fc94642bae96821a393f342edcfa9794a6 <dd4c2a174994238d55ab54da2545543d36f4e0d0
  5. Affected versionversion=c2f672fc94642bae96821a393f342edcfa9794a6 <e952837f3ddb0ff726d5b582aa1aad9aa38d024d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=c2f672fc94642bae96821a393f342edcfa9794a6 <a16871c7832ea6435abb6e0b58289ae7dcb7e4fc; version=c2f672fc94642bae96821a393f342edcfa9794a6 <b86dc510308d7a8955f3f47a4fea4bef887653e4; version=c2f672fc94642bae96821a393f342edcfa9794a6 <dd4c2a174994238d55ab54da2545543d36f4e0d0; version=c2f672fc94642bae96821a393f342edcfa9794a6 <e952837f3ddb0ff726d5b582aa1aad9aa38d024d

Published CVSS scores

7.1CISA-ADPCVSS: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 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-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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