CVE-2023-3107 | Remote denial of service in IPv6 fragment reassembly

A set of carefully crafted ipv6 packets can trigger an integer overflow in the calculation of a fragment reassembled packet's payload length field. This allows an attacker to trigger a kernel panic, resulting in a denial of service.

Published: 2023-08-01 Last update: 2025-07-09 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-3107 is rated Moderate Risk (44.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.21%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-3107

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.68% 0.21% -0.47%
2 2025-11-18 0.16% 0.68% +0.51%
3 2025-07-13 — 0.16% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-3107

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-3107

Affected software / configurations for CVE-2023-3107

Vendor Product Version Raw CPE
freebsd freebsd 12.4 cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:*
freebsd freebsd 12.4 cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:*
freebsd freebsd 12.4 cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:*
freebsd freebsd 12.4 cpe:2.3:o:freebsd:freebsd:12.4:p3:*:*:*:*:*:*
freebsd freebsd 12.4 cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:*
freebsd freebsd 12.4 cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:-:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:b1-p1:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:b2-p2:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p1:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p2:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p3:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p4:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p5:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p6:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p7:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:p8:*:*:*:*:*:*
freebsd freebsd 13.1 cpe:2.3:o:freebsd:freebsd:13.1:rc1-p1:*:*:*:*:*:*
freebsd freebsd 13.2 cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*
freebsd freebsd 13.2 cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:*
netapp clustered_data_ontap 9.0 cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:*

References for CVE-2023-3107

cvelogic Threat Intelligence