CVE-2026-64411

Kernel-data disclosure or crash via unterminated table name

Published Jul 25, 2026 · Updated Jul 25, 2026

Out-of-bounds read in Linux Kernel ebtables allows local users to disclose kernel-stack data or crash the host via a table name. The update_counters(), compat_update_counters(), and compat_do_replace() paths pass a user-supplied 32-byte name without NUL termination, so vsnprintf() scans beyond the stack field on a lookup miss. Reaching the setsockopt() path requires CAP_NET_ADMIN in a network namespace; a low-privileged local user can obtain it through new user and network namespaces, with no remote attack path.

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

Out-of-bounds read in Linux Kernel ebtables allows local users to disclose kernel-stack data or crash the host via a table name. The update_counters(), compat_update_counters(), and compat_do_replace() paths pass a user-supplied 32-byte name without NUL termination, so vsnprintf() scans beyond the stack field on a lookup miss. Reaching the setsockopt() path requires CAP_NET_ADMIN in a network namespace; a low-privileged local user can obtain it through new user and network namespaces, with no remote attack path.

The record

CVE
CVE-2026-64411
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2664f537ca5bcb2ef3fac2683dcca602e51fad24
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c046ca4e35a83ea32f6e748f54139f5fe2a1d01
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fe8d3cecd20bfaaaf440db3a06ba674d2f2e322
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7436da6c1bc44654b7f11a17e746f6999fd37250
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a622d2e9608c9dff47fc2e5759ac7aa3a836b45d
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ab63ccefb9c71627f957a0724c2b9ebc869c6f20
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b6183b1b88a722b6d8ea0cecc99eba168a15e0be
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6f539311e58e76aa96feef0f1572b13a564f8a2
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2664f537ca5bcb2ef3fac2683dcca602e51fad24; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c046ca4e35a83ea32f6e748f54139f5fe2a1d01; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fe8d3cecd20bfaaaf440db3a06ba674d2f2e322; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7436da6c1bc44654b7f11a17e746f6999fd37250; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a622d2e9608c9dff47fc2e5759ac7aa3a836b45d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ab63ccefb9c71627f957a0724c2b9ebc869c6f20; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b6183b1b88a722b6d8ea0cecc99eba168a15e0be; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6f539311e58e76aa96feef0f1572b13a564f8a2; version=2.6.12

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
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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