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CVE-2025-11961· NVD / CVE Program· CNA Tcpdump

OOBR and OOBW in pcap_ether_aton() in libpcap

pcap_ether_aton() is an auxiliary function in libpcap, it takes a string argument and returns a fixed-size allocated buffer. The string argument must be a well-formed MAC-48 address in one of the supported formats, but this requirement has been poorly documented. If an application calls the function with an argument that deviates from the expected format, the function can read data beyond the end of the provided string and write data beyond the end of the allocated buffer.

LowCVSS 1.9 · v3.1—No exploit Fix available
Published
Dec 30, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 2th percentile
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Report tools

JSON

Action score

7

Monitor

Low priority for now.

CVSS
7 / 40 · 1.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Tcpdump
1.9
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Tcpdump). Independent of NVD's CPE analysis and usually ahead of it.

  • The Tcpdump Group libpcap

    • before 1.10.6affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Alpine:v3.21libpcapbefore 1.10.7-r01.10.7-r0
Alpine:v3.24libpcapbefore 1.10.6-r01.10.6-r0
Debian:12libpcapall versions—
Debian:14libpcapbefore 1.10.6-11.10.6-1
openSUSE:Leap 15.6libpcapbefore 1.10.4-150600.3.9.11.10.4-150600.3.9.1
openSUSE:Leap 16.0libpcapbefore 1.10.5-160000.4.11.10.5-160000.4.1
openSUSE:Tumbleweedlibpcapbefore 1.10.6-1.11.10.6-1.1
SUSE:Linux Enterprise Micro 5.2libpcapbefore 1.9.1-150300.3.6.11.9.1-150300.3.6.1
SUSE:Linux Enterprise Micro 5.3libpcapbefore 1.10.1-150400.3.9.11.10.1-150400.3.9.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libpcapbefore 1.10.5-150700.3.7.11.10.5-150700.3.7.1
SUSE:Linux Enterprise Server 16.0libpcapbefore 1.10.5-160000.4.11.10.5-160000.4.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5libpcapbefore 1.8.1-10.9.11.8.1-10.9.1
SUSE:Linux Micro 6.0libpcapbefore 1.10.4-4.11.10.4-4.1
SUSE:Linux Micro 6.1libpcapbefore 1.10.4-slfo.1.1_2.11.10.4-slfo.1.1_2.1

Same product

the tcpdump group: all records

Other highest-scoring records for the same primary product.

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
The Tcpdump Group libpcap1.10.6Vendor (CNA)
alpine:libpcap1.10.7-r0 · Alpine:v3.21Package registry (OSV)
debian:libpcap1.10.6-1 · Debian:14Package registry (OSV)
opensuse:libpcap1.10.4-150600.3.9.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:libpcap1.9.1-150300.3.6.1 · SUSE:Linux Enterprise Micro 5.2Package 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Local
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

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.

ATT&CK techniques

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records