CVE-2022-49015

Kernel use-after-free via post-delivery skb dereference

Published Oct 21, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel HSR networking from 3.13 allows local users to trigger an invalid kernel-memory read during frame delivery. The hsr_deliver_master function calls netif_rx, which can free the skb, and then reads skb->len to update receive-byte statistics. Local low-privileged access is required, and the public record establishes no reliable exploitation path or consequence beyond unsafe kernel-memory access.

CVSS severity7.8
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 Linux kernel HSR networking from 3.13 allows local users to trigger an invalid kernel-memory read during frame delivery. The hsr_deliver_master function calls netif_rx, which can free the skb, and then reads skb->len to update receive-byte statistics. Local low-privileged access is required, and the public record establishes no reliable exploitation path or consequence beyond unsafe kernel-memory access.

The record

CVE
CVE-2022-49015
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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=3.13
  2. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <4b351609af4fdbc23f79ab2b12748f4403ea9af4
  3. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <53a62c5efe91665f7a41fad0f888a96f94dc59eb
  4. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <7ca81a161e406834a1fdc405fc83a572bd14b8d9
  5. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <7e177d32442b7ed08a9fa61b61724abc548cb248
  6. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <8393ce5040803666bfa26a3a7bf41e44fab0ace9
  7. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <b35d899854d5d5d58eb7d7e7c0f61afc60d3a9e9
  8. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <dca370e575d9b6c983f5015e8dc035e23e219ee6
  9. Affected versionversion=f421436a591d34fa5279b54a96ac07d70250cc8d <f3add2b8cf620966de3ebfa07679ca12d33ec26f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.13; version=f421436a591d34fa5279b54a96ac07d70250cc8d <4b351609af4fdbc23f79ab2b12748f4403ea9af4; version=f421436a591d34fa5279b54a96ac07d70250cc8d <53a62c5efe91665f7a41fad0f888a96f94dc59eb; version=f421436a591d34fa5279b54a96ac07d70250cc8d <7ca81a161e406834a1fdc405fc83a572bd14b8d9; version=f421436a591d34fa5279b54a96ac07d70250cc8d <7e177d32442b7ed08a9fa61b61724abc548cb248; version=f421436a591d34fa5279b54a96ac07d70250cc8d <8393ce5040803666bfa26a3a7bf41e44fab0ace9; version=f421436a591d34fa5279b54a96ac07d70250cc8d <b35d899854d5d5d58eb7d7e7c0f61afc60d3a9e9; version=f421436a591d34fa5279b54a96ac07d70250cc8d <dca370e575d9b6c983f5015e8dc035e23e219ee6; version=f421436a591d34fa5279b54a96ac07d70250cc8d <f3add2b8cf620966de3ebfa07679ca12d33ec26f

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

CWE-416Use After Free

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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