CVE-2025-22004Network attack vector

Kernel data disclosure or panic via freed skb

Published Apr 3, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel ATM LANE transmit path allows remote attackers to leak kernel data or panic affected systems. lec_send() calls a VCC send operation that frees the skb, then reads skb->len from the released object to update tx_bytes. Reachability requires an active lec%d LANE interface; the stale four-byte value corrupts accounting, while a panic requires KASAN or KFENCE with panic_on_warn.

CVSS severity8.6
High
EPSS probability0.35%
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 ATM LANE transmit path allows remote attackers to leak kernel data or panic affected systems. lec_send() calls a VCC send operation that frees the skb, then reads skb->len from the released object to update tx_bytes. Reachability requires an active lec%d LANE interface; the stale four-byte value corrupts accounting, while a panic requires KASAN or KFENCE with panic_on_warn.

The record

CVE
CVE-2025-22004
Published
Apr 3, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <326223182e4703cde99fdbd36d07d0b3de9980fb
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <50e288097c2c6e5f374ae079394436fc29d1e88e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51e8be9578a2e74f9983d8fd8de8cafed191f30c
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <82d9084a97892de1ee4881eb5c17911fcd9be6f6
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8cd90c7db08f32829bfa1b5b2b11fbc542afbab7
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9566f6ee13b17a15d0a47667ad1b1893c539f730
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3009d0d6ab78053117f8857b921a8237f4d17b3
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3271f7548385e0096739965961c7cbf7e6b4762
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <326223182e4703cde99fdbd36d07d0b3de9980fb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <50e288097c2c6e5f374ae079394436fc29d1e88e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51e8be9578a2e74f9983d8fd8de8cafed191f30c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <82d9084a97892de1ee4881eb5c17911fcd9be6f6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8cd90c7db08f32829bfa1b5b2b11fbc542afbab7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9566f6ee13b17a15d0a47667ad1b1893c539f730; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3009d0d6ab78053117f8857b921a8237f4d17b3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3271f7548385e0096739965961c7cbf7e6b4762; version=2.6.12

Published CVSS scores

8.6Linux Kernel CVE TeamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application 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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