CVE-2022-50365

Kernel crash via unaccounted skb tail extension

Published Sep 17, 2025 · Updated Sep 17, 2025

A denial of service in the Linux kernel's skbuff code allows local users to crash the kernel through crafted BPF packet processing. The skb_segment path fails to account for a tail extension after BPF_FUNC_skb_pull_data reads beyond the head skb's linear data, so ordinary GSO handling reaches a kernel BUG. Exploitation requires low-privileged local access and a GSO frag_list of linear skbs without head_frag; the bounded consequence is a host service interruption from a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A denial of service in the Linux kernel's skbuff code allows local users to crash the kernel through crafted BPF packet processing. The skb_segment path fails to account for a tail extension after BPF_FUNC_skb_pull_data reads beyond the head skb's linear data, so ordinary GSO handling reaches a kernel BUG. Exploitation requires low-privileged local access and a GSO frag_list of linear skbs without head_frag; the bounded consequence is a host service interruption from a kernel crash.

The record

CVE
CVE-2022-50365
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=162a5a8c3aff15c449e6b38355cdf80ab4f77a5a <ff3743d00f41d803e6ab9334962b674f3b7fd0cb
  2. Affected versionversion=3dcbdb134f329842a38f0e6797191b885ab00a00 <2d7afdcbc9d32423f177ee12b7c93783aea338fb
  3. Affected versionversion=3dcbdb134f329842a38f0e6797191b885ab00a00 <331615d837f4979eb91a336a223a5c7f7886ecd5
  4. Affected versionversion=3dcbdb134f329842a38f0e6797191b885ab00a00 <668dc454bcbd1da73605201ff43f988c70848215
  5. Affected versionversion=3dcbdb134f329842a38f0e6797191b885ab00a00 <821be5a5ab09a40ba09cb5ba354f18cf7996fea0
  6. Affected versionversion=3dcbdb134f329842a38f0e6797191b885ab00a00 <8fb773eed4909ef5dc1bbeb3629a337d3336df7e
  7. Affected versionversion=3dcbdb134f329842a38f0e6797191b885ab00a00 <946dd5dc4fcc4123cdfe3942b20012c4448cf89a
  8. Affected versionversion=5.3
  9. Affected versionversion=55fb612bef7fd237fb70068e2b6ff1cd1543a8ef <6ac417d71b80e74b002313fcd73f7e9008e8e457
  10. Affected versionversion=821302dd0c51d29269ef73a595bdff294419e2cd <2d59f0ca153e9573ec4f140988c0ccca0eb4181b
  11. Affected versionversion=92984818ff8cfd97311a5e0ac27f148a00df2b54

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=162a5a8c3aff15c449e6b38355cdf80ab4f77a5a <ff3743d00f41d803e6ab9334962b674f3b7fd0cb; version=3dcbdb134f329842a38f0e6797191b885ab00a00 <2d7afdcbc9d32423f177ee12b7c93783aea338fb; version=3dcbdb134f329842a38f0e6797191b885ab00a00 <331615d837f4979eb91a336a223a5c7f7886ecd5; version=3dcbdb134f329842a38f0e6797191b885ab00a00 <668dc454bcbd1da73605201ff43f988c70848215; version=3dcbdb134f329842a38f0e6797191b885ab00a00 <821be5a5ab09a40ba09cb5ba354f18cf7996fea0; version=3dcbdb134f329842a38f0e6797191b885ab00a00 <8fb773eed4909ef5dc1bbeb3629a337d3336df7e; version=3dcbdb134f329842a38f0e6797191b885ab00a00 <946dd5dc4fcc4123cdfe3942b20012c4448cf89a; version=5.3; version=55fb612bef7fd237fb70068e2b6ff1cd1543a8ef <6ac417d71b80e74b002313fcd73f7e9008e8e457; version=821302dd0c51d29269ef73a595bdff294419e2cd <2d59f0ca153e9573ec4f140988c0ccca0eb4181b; version=92984818ff8cfd97311a5e0ac27f148a00df2b54

Published CVSS scores

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

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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