CVE-2024-50085Network attack vector

Remote host crash via MPTCP subflow use-after-free

Published Oct 29, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel MPTCP path management allows remote attackers to crash hosts through a crafted RM_ADDR option. mptcp_pm_nl_rm_addr_or_subflow closes a subflow and then reads its freed mptcp_subflow_context while deciding whether to update path-manager state. Any unauthenticated peer on an MPTCP connection can trigger the default-enabled path before application authentication, causing a kernel panic on hardened or panic-on-warn builds and potentially corrupting MPTCP accounting.

CVSS severity9.8
Critical
EPSS probability0.48%
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 MPTCP path management allows remote attackers to crash hosts through a crafted RM_ADDR option. mptcp_pm_nl_rm_addr_or_subflow closes a subflow and then reads its freed mptcp_subflow_context while deciding whether to update path-manager state. Any unauthenticated peer on an MPTCP connection can trigger the default-enabled path before application authentication, causing a kernel panic on hardened or panic-on-warn builds and potentially corrupting MPTCP accounting.

The record

CVE
CVE-2024-50085
Published
Oct 29, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 29, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1c1f721375989579e46741f59523e39ec9b2a9bd <7decd1f5904a489d3ccdcf131972f94645681689
  2. Affected versionversion=1c1f721375989579e46741f59523e39ec9b2a9bd <a8c36ea4ef9a350816f6556c5c5b63810f84b538
  3. Affected versionversion=2060f1efab370b496c4903b840844ecaff324c3c
  4. Affected versionversion=35b31f5549ede4070566b949781e83495906b43d <35301636439138b821f1f6169bd00d348ebd388a
  5. Affected versionversion=5.15.167 <5.15.169
  6. Affected versionversion=6.10.7 <6.11
  7. Affected versionversion=6.11
  8. Affected versionversion=6.1.107 <6.1.114
  9. Affected versionversion=6.6.48 <6.6.58
  10. Affected versionversion=85b866e4c4e63a1d7afb58f1e24273caad03d0b7 <da3343bc0839b180fd9af9c27fa456d8231409f9
  11. Affected versionversion=d20bf2c96d7ffd171299b32f562f70e5bf5dc608 <7b2e478abab0b3a33515433a6af563aebba773c1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1c1f721375989579e46741f59523e39ec9b2a9bd <7decd1f5904a489d3ccdcf131972f94645681689; version=1c1f721375989579e46741f59523e39ec9b2a9bd <a8c36ea4ef9a350816f6556c5c5b63810f84b538; version=2060f1efab370b496c4903b840844ecaff324c3c; version=35b31f5549ede4070566b949781e83495906b43d <35301636439138b821f1f6169bd00d348ebd388a; version=5.15.167 <5.15.169; version=6.10.7 <6.11; version=6.11; version=6.1.107 <6.1.114; version=6.6.48 <6.6.58; version=85b866e4c4e63a1d7afb58f1e24273caad03d0b7 <da3343bc0839b180fd9af9c27fa456d8231409f9; version=d20bf2c96d7ffd171299b32f562f70e5bf5dc608 <7b2e478abab0b3a33515433a6af563aebba773c1

Published CVSS scores

7.8Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8Linux CNACVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

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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