CVE-2024-26675

Service interruption via oversized PPP async MRU

Published Apr 2, 2024 · Updated May 11, 2026

Resource exhaustion in the Linux kernel allows local users to interrupt service by configuring an oversized asynchronous PPP MRU. ppp_async_ioctl accepts PPPIOCSMRU values above 65,535 without a sanity check, so ppp_async_input later requests an excessive receive-buffer allocation. Low-privileged local access to configure an asynchronous PPP line is required; triggering the path can warn in __alloc_pages and disrupt kernel availability.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Linux kernel allows local users to interrupt service by configuring an oversized asynchronous PPP MRU. ppp_async_ioctl accepts PPPIOCSMRU values above 65,535 without a sanity check, so ppp_async_input later requests an excessive receive-buffer allocation. Low-privileged local access to configure an asynchronous PPP line is required; triggering the path can warn in __alloc_pages and disrupt kernel availability.

The record

CVE
CVE-2024-26675
Published
Apr 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-770, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 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

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Is a vulnerable build present?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <210d938f963dddc543b07e66a79b7d8d4bd00bd8
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4e2c4846b2507f6dfc9bea72b7567c2693a82a16
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4fdb14ba89faff6e6969a4dffdc8e54235d6e5ed
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <56fae81633ccee307cfcb032f706bf1863a56982
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <58fbe665b097bf7b3144da7e7b91fb27aa8d0ae3
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7e5ef49670766c9742ffcd9cead7cdb018268719
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b06e067e93fa4b98acfd3a9f38a398ab91bbc58b
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cb88cb53badb8aeb3955ad6ce80b07b598e310b8
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <210d938f963dddc543b07e66a79b7d8d4bd00bd8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4e2c4846b2507f6dfc9bea72b7567c2693a82a16; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4fdb14ba89faff6e6969a4dffdc8e54235d6e5ed; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <56fae81633ccee307cfcb032f706bf1863a56982; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <58fbe665b097bf7b3144da7e7b91fb27aa8d0ae3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7e5ef49670766c9742ffcd9cead7cdb018268719; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b06e067e93fa4b98acfd3a9f38a398ab91bbc58b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cb88cb53badb8aeb3955ad6ce80b07b598e310b8; version=2.6.12

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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