CVE-2025-22057

Kernel crash via stale cached destination counters

Published Apr 16, 2025 · Updated Aug 5, 2026

Denial of service in affected Linux kernel releases allows local users to crash the kernel during cached network destination teardown. The dst_release function fails to invalidate cached destinations and decrement their counters before network-namespace teardown, leaving later destruction to touch freed counter storage. Reachability requires CONFIG_DST_CACHE and Open vSwitch tunnels; the documented consequence is a kernel paging fault and service interruption.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux kernel releases allows local users to crash the kernel during cached network destination teardown. The dst_release function fails to invalidate cached destinations and decrement their counters before network-namespace teardown, leaving later destruction to touch freed counter storage. Reachability requires CONFIG_DST_CACHE and Open vSwitch tunnels; the documented consequence is a kernel paging fault and service interruption.

The record

CVE
CVE-2025-22057
Published
Apr 16, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 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=4.6
  2. Affected versionversion=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <3a0a3ff6593d670af2451ec363ccb7b18aec0c0a
  3. Affected versionversion=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <836415a8405c9665ae55352fc5ba865c242f5e4f
  4. Affected versionversion=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <92a5c18513117be69bc00419dd1724c1940f8fcd
  5. Affected versionversion=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <ccc331fd5bcae131d2627d5ef099d4a1f6540aea
  6. Affected versionversion=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <e833e7ad64eb2f63867f65303be49ca30ee8819e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <3a0a3ff6593d670af2451ec363ccb7b18aec0c0a; version=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <836415a8405c9665ae55352fc5ba865c242f5e4f; version=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <92a5c18513117be69bc00419dd1724c1940f8fcd; version=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <ccc331fd5bcae131d2627d5ef099d4a1f6540aea; version=d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8 <e833e7ad64eb2f63867f65303be49ca30ee8819e

Published CVSS scores

5.5NIST NVDCVSS: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

T1499.004Application or System Exploitation

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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