CVE-2025-11961

OOBR and OOBW in pcap_ether_aton() in libpcap

LOW
1.9
CVSS Score
Published: December 31, 2025 at 12:56 AM UTC
Updated: June 17, 2026 at 08:31 AM UTC
1 product affected across 1 vendorLibpcap

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Severity
LOW1.9
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.10.6
Affected range stops below 1.10.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

1.9LOWTcpdump
Attack Vector
LOCAL
Complexity
HIGH
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-122CWE-126

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