CVE-2025-68813Network attack vector

Kernel crash via unset IPVS packet device

Published Jan 13, 2026 · Updated Jan 13, 2026

NULL pointer dereference in Linux Kernel IPVS allows remote attackers to crash the system through an IPv4 NAT route failure. The __ip_vs_get_out_rt() error path calls dst_link_failure() while skb->dev is unset, causing fib_compute_spec_dst() to dereference NULL. Reachability requires IPVS NAT mode, a misconfigured destination, and a failed route lookup; the bounded consequence is a kernel crash.

CVSS severity7.5
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux Kernel IPVS allows remote attackers to crash the system through an IPv4 NAT route failure. The __ip_vs_get_out_rt() error path calls dst_link_failure() while skb->dev is unset, causing fib_compute_spec_dst() to dereference NULL. Reachability requires IPVS NAT mode, a misconfigured destination, and a failed route lookup; the bounded consequence is a kernel crash.

The record

CVE
CVE-2025-68813
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=3d988fcddbe7b8673a231958bd2fba61b5a7ced9
  2. Affected versionversion=5.1
  3. Affected versionversion=6bd1ee0a993fc9574ae43c1994c54a60cb23a380
  4. Affected versionversion=6c2fa855d8178699706b1192db2f1f8102b0ba1e
  5. Affected versionversion=8a430e56a6485267a1b2d3747209d26c54d1a34b
  6. Affected versionversion=ed0de45a1008991fdaa27a0152befcb74d126a8b <25ab24df31f7af843c96a38e0781b9165216e1a8
  7. Affected versionversion=ed0de45a1008991fdaa27a0152befcb74d126a8b <4729ff0581fbb7ad098b6153b76b6f5aac94618a
  8. Affected versionversion=ed0de45a1008991fdaa27a0152befcb74d126a8b <689a627d14788ad772e0fa24c2e57a23dbc7ce90
  9. Affected versionversion=ed0de45a1008991fdaa27a0152befcb74d126a8b <ad891bb3d079a46a821bf2b8867854645191bab0
  10. Affected versionversion=ed0de45a1008991fdaa27a0152befcb74d126a8b <cdeff10851c37a002d87a035818ebd60fdb74447
  11. Affected versionversion=fbf569d2beee2a4a7a0bc8b619c26101d1211a88
  12. Affected versionversion=ff71f99d5fb2daf54340e8b290d0bc4e6b4c1d38

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3d988fcddbe7b8673a231958bd2fba61b5a7ced9; version=5.1; version=6bd1ee0a993fc9574ae43c1994c54a60cb23a380; version=6c2fa855d8178699706b1192db2f1f8102b0ba1e; version=8a430e56a6485267a1b2d3747209d26c54d1a34b; version=ed0de45a1008991fdaa27a0152befcb74d126a8b <25ab24df31f7af843c96a38e0781b9165216e1a8; version=ed0de45a1008991fdaa27a0152befcb74d126a8b <4729ff0581fbb7ad098b6153b76b6f5aac94618a; version=ed0de45a1008991fdaa27a0152befcb74d126a8b <689a627d14788ad772e0fa24c2e57a23dbc7ce90; version=ed0de45a1008991fdaa27a0152befcb74d126a8b <ad891bb3d079a46a821bf2b8867854645191bab0; version=ed0de45a1008991fdaa27a0152befcb74d126a8b <cdeff10851c37a002d87a035818ebd60fdb74447; version=fbf569d2beee2a4a7a0bc8b619c26101d1211a88; version=ff71f99d5fb2daf54340e8b290d0bc4e6b4c1d38

Published CVSS scores

7.5SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7SUSECVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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