CVE-2022-48782

Kernel memory corruption via stale MCTP key

Published Jul 16, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel MCTP routing in 5.16 through 5.16.10 allows adjacent remote attackers to corrupt memory via crafted frames. In net/mctp/route.c, the mctp_key_add() failure path frees a key and then passes that stale pointer to trace_mctp_key_acquire(). Exploitation requires access to an MCTP link and concurrent fragmented start-of-message frames with a duplicate source, destination, and tag tuple; successful triggering corrupts the receiving kernel's memory.

CVSS severity8.8
High
EPSS probability0.30%
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 MCTP routing in 5.16 through 5.16.10 allows adjacent remote attackers to corrupt memory via crafted frames. In net/mctp/route.c, the mctp_key_add() failure path frees a key and then passes that stale pointer to trace_mctp_key_acquire(). Exploitation requires access to an MCTP link and concurrent fragmented start-of-message frames with a duplicate source, destination, and tag tuple; successful triggering corrupts the receiving kernel's memory.

The record

CVE
CVE-2022-48782
Published
Jul 16, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 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=4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899 <1dd3ecbec5f606b2a526c47925c8634b1a6bb81e
  2. Affected versionversion=4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899 <7e5b6a5c8c44310784c88c1c198dde79f6402f7b
  3. Affected versionversion=5.16

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899 <1dd3ecbec5f606b2a526c47925c8634b1a6bb81e; version=4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899 <7e5b6a5c8c44310784c88c1c198dde79f6402f7b; version=5.16

Published CVSS scores

7.8NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Linux kernel CVE teamCVSS:3.1/AV:A/AC:L/PR:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1210Exploitation of Remote Services

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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