CVE-2022-48906

Service interruption via DATA_FIN timeout shift overflow

Published Aug 22, 2024 · Updated May 23, 2026

Shift-out-of-bounds in Linux MPTCP timeout handling allows local users to interrupt service via repeated DATA_FIN retransmissions. The mptcp_set_datafin_timeout function shifts a 32-bit timeout value by an unchecked retransmission count, so a count of 32 produces an out-of-bounds shift. Low-privileged local access and an MPTCP connection with numerous DATA_FIN retransmissions are required; the resulting kernel fault affects availability without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Shift-out-of-bounds in Linux MPTCP timeout handling allows local users to interrupt service via repeated DATA_FIN retransmissions. The mptcp_set_datafin_timeout function shifts a 32-bit timeout value by an unchecked retransmission count, so a count of 32 produces an out-of-bounds shift. Low-privileged local access and an MPTCP connection with numerous DATA_FIN retransmissions are required; the resulting kernel fault affects availability without reported data disclosure or modification.

The record

CVE
CVE-2022-48906
Published
Aug 22, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=0af76111c2a6326e4bb56f64a6e453c6ec6dd2da
  2. Affected versionversion=5.12.4 <5.13
  3. Affected versionversion=5.13
  4. Affected versionversion=6477dd39e62c3a67cfa368ddc127410b4ae424c6 <03ae283bd71f761feae3f402668d698b393b0e79
  5. Affected versionversion=6477dd39e62c3a67cfa368ddc127410b4ae424c6 <0c3f34beb459753f9f80d0cc14c1b50ab615c631
  6. Affected versionversion=6477dd39e62c3a67cfa368ddc127410b4ae424c6 <877d11f0332cd2160e19e3313e262754c321fa36

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0af76111c2a6326e4bb56f64a6e453c6ec6dd2da; version=5.12.4 <5.13; version=5.13; version=6477dd39e62c3a67cfa368ddc127410b4ae424c6 <03ae283bd71f761feae3f402668d698b393b0e79; version=6477dd39e62c3a67cfa368ddc127410b4ae424c6 <0c3f34beb459753f9f80d0cc14c1b50ab615c631; version=6477dd39e62c3a67cfa368ddc127410b4ae424c6 <877d11f0332cd2160e19e3313e262754c321fa36

Published CVSS scores

5.5NIST NVDCVSS: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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