CVE-2022-50817

System crash via cloning failed HSR allocation

Published Dec 30, 2025 · Updated Dec 30, 2025

NULL pointer dereference in Linux kernel HSR forwarding allows remote attackers on an adjacent network to crash affected systems. hsr_get_untagged_frame() passes a NULL result from create_stripped_skb_hsr() to skb_clone() instead of stopping when allocation fails. The target must process traffic on a configured High-availability Seamless Redundancy interface; exploitation causes a kernel fault and service interruption, with no published data-access or code-execution impact.

CVSS severity5.3
Medium
EPSS probability0.23%
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 HSR forwarding allows remote attackers on an adjacent network to crash affected systems. hsr_get_untagged_frame() passes a NULL result from create_stripped_skb_hsr() to skb_clone() instead of stopping when allocation fails. The target must process traffic on a configured High-availability Seamless Redundancy interface; exploitation causes a kernel fault and service interruption, with no published data-access or code-execution impact.

The record

CVE
CVE-2022-50817
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=3.17
  2. Affected versionversion=f266a683a4804dc499efc6c2206ef68efed029d0 <35ece858660eae13ee0242496a1956c39d29418e
  3. Affected versionversion=f266a683a4804dc499efc6c2206ef68efed029d0 <c46f2e0fcd1ecfc6046e5cf785ff89f0572f94e4
  4. Affected versionversion=f266a683a4804dc499efc6c2206ef68efed029d0 <d8b57135fd9ffe9a5b445350a686442a531c5339
  5. Affected versionversion=f266a683a4804dc499efc6c2206ef68efed029d0 <ff7ba766758313129794f150bbc4d351b5e17a53

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.17; version=f266a683a4804dc499efc6c2206ef68efed029d0 <35ece858660eae13ee0242496a1956c39d29418e; version=f266a683a4804dc499efc6c2206ef68efed029d0 <c46f2e0fcd1ecfc6046e5cf785ff89f0572f94e4; version=f266a683a4804dc499efc6c2206ef68efed029d0 <d8b57135fd9ffe9a5b445350a686442a531c5339; version=f266a683a4804dc499efc6c2206ef68efed029d0 <ff7ba766758313129794f150bbc4d351b5e17a53

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.3SUSECVSS:3.1/AV:A/AC:H/PR:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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