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NVD / CVE Program· CNA mitre

CVE-2025-51006: Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the dlt_linuxsll2_cleanup() function in…

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: tcpreplay (Debian:14) 4.5.2-1; tcpreplay (openSUSE:Leap 16.0) 4.5.2-bp160.1.1; tcpreplay (openSUSE:Tumbleweed) 4.5.2-1.1.

Low priority for now. Upgrade to tcpreplay (Debian:14) 4.5.2-1; tcpreplay (openSUSE:Leap 16.0) 4.5.2-bp160.1.1; tcpreplay (openSUSE:Tumbleweed) 4.5.2-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the dlt_linuxsll2_cleanup() function in plugins/dlt_linuxsll2/linuxsll2.c. This vulnerability is triggered when tcpedit_dlt_cleanup() indirectly invokes the cleanup routine multiple times on the same memory region. By supplying a specifically crafted pcap file to the tcprewrite binary, a local attacker can exploit this flaw to cause a Denial of Service (DoS) via memory corruption.

Published
Sep 22, 2025
Updated
Nov 5, 2026
EPSS
0.1% · 8th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
broadcomtcpreplay

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • broadcom tcpreplay4.5.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12tcpreplayfrom 0—
Debian:14tcpreplaybefore 4.5.2-14.5.2-1
openSUSE:Leap 16.0tcpreplaybefore 4.5.2-bp160.1.14.5.2-bp160.1.1
openSUSE:Tumbleweedtcpreplaybefore 4.5.2-1.14.5.2-1.1

Same product

broadcom: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-18408A use-after-free was discovered in the tcpbridge binary of Tcpreplay 4.3.0 beta1.
    40Plan
  • CVE-2020-12740tcprewrite in Tcpreplay through 4.3.2 has a heap-based buffer over-read during a get_c operation.
    37Monitor
  • CVE-2017-14266tcprewrite in Tcpreplay 3.4.4 has a Heap-Based Buffer Overflow vulnerability triggered by a crafted PCAP file, a related issue to…
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-9386Aug 24, 2025 · appneta tcpreplay tcprewrite get.c get_l2len_protocol use after free
    7Monitor
  • ← EarlierCVE-2025-9649Aug 29, 2025 · appneta tcpreplay send_packets.c calc_sleep_time divide by zero
    7Monitor
  • Later →CVE-2025-51005Sep 23, 2025 · A heap-buffer-overflow vulnerability exists in the tcpliveplay utility of the tcpreplay-4.5.1.
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:tcpreplay4.5.2-1 · Debian:14Package registry (OSV)
opensuse:tcpreplay4.5.2-1.1 · openSUSE:TumbleweedPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

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