CVE-2024-26953Network attack vector

Kernel memory corruption via wrong page-pool release

Published May 1, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel ESP path allows remote attackers to corrupt kernel memory and crash IPsec gateways via forwarded traffic. During non-inline esp_output reorganization, the ESP code calls put_page on fragment pages owned by page_pool instead of using page-pool-aware reference release. Reachability requires configured, non-offloaded IPsec and GRE forwarding with page_pool-backed fragments; repeated traffic can expose reallocated kernel data, overwrite kernel objects, or panic the gateway.

CVSS severity9.8
Critical
EPSS probability0.66%
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 ESP path allows remote attackers to corrupt kernel memory and crash IPsec gateways via forwarded traffic. During non-inline esp_output reorganization, the ESP code calls put_page on fragment pages owned by page_pool instead of using page-pool-aware reference release. Reachability requires configured, non-offloaded IPsec and GRE forwarding with page_pool-backed fragments; repeated traffic can expose reallocated kernel data, overwrite kernel objects, or panic the gateway.

The record

CVE
CVE-2024-26953
Published
May 1, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 1, 2024CVE 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=5.14
  2. Affected versionversion=6a5bcd84e886a9a91982e515c539529c28acdcc2 <1abb20a5f4b02fb3020f88456fc1e6069b3cdc45
  3. Affected versionversion=6a5bcd84e886a9a91982e515c539529c28acdcc2 <8291b4eac429c480386669444c6377573f5d8664
  4. Affected versionversion=6a5bcd84e886a9a91982e515c539529c28acdcc2 <c3198822c6cb9fb588e446540485669cc81c5d34
  5. Affected versionversion=6a5bcd84e886a9a91982e515c539529c28acdcc2 <f278ff9db67264715d0d50e3e75044f8b78990f4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=6a5bcd84e886a9a91982e515c539529c28acdcc2 <1abb20a5f4b02fb3020f88456fc1e6069b3cdc45; version=6a5bcd84e886a9a91982e515c539529c28acdcc2 <8291b4eac429c480386669444c6377573f5d8664; version=6a5bcd84e886a9a91982e515c539529c28acdcc2 <c3198822c6cb9fb588e446540485669cc81c5d34; version=6a5bcd84e886a9a91982e515c539529c28acdcc2 <f278ff9db67264715d0d50e3e75044f8b78990f4

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8Linux Kernel CNACVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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