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01 Record

CVE-2026-101303

IPv6 UDP sendto(2) bypasses jail loopback restriction

HighPUBLISHEDCNA: freebsd
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

02 Description

IPv6 UDP sendto(2) bypasses jail loopback restriction

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.21% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 11.3% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-20.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-15 06:58Z14 DAYS AGO
Last updated
2026-10-16 18:36Z12 DAYS AGO
Reserved
2026-09-28
Assigning CNA
freebsd
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
  • CWE-941Incorrectly Specified Destination in a Communication ChannelBase
Data version
5.2
Document digest
959ad24cce2c679531465575cd84820904837fe81e38b43b8cf462872c73f515

05 Affected products

VendorProductVersionsPlatforms
FreeBSDFreeBSD15.1-RELEASE to < p4, 15.0-RELEASE to < p14, 14.5-RELEASE to < p1, 14.4-RELEASE to < p10—

06 References