CVE-2022-27942Public exploit

Local crash via truncated MPLS packet parsing

Published Mar 26, 2022 · Updated Aug 3, 2024

Heap buffer over-read in tcpprep in Broadcom Tcpreplay 4.4.1 allows local users to crash the process via a crafted PCAP file. The parse_mpls function in common/get.c advances through MPLS headers without ensuring that four bytes remain before dereferencing the next header. Exploitation requires a user to process the attacker-supplied capture with tcpprep; the demonstrated result is an out-of-bounds four-byte read and process abort, not code execution.

CVSS severity7.8
High
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer over-read in tcpprep in Broadcom Tcpreplay 4.4.1 allows local users to crash the process via a crafted PCAP file. The parse_mpls function in common/get.c advances through MPLS headers without ensuring that four bytes remain before dereferencing the next header. Exploitation requires a user to process the attacker-supplied capture with tcpprep; the demonstrated result is an out-of-bounds four-byte read and process abort, not code execution.

The record

CVE
CVE-2022-27942
Published
Mar 26, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

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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