CVE-2018-17156

mediumpriority · track · 25EPSS 0.016 · 76 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.63% (76th) EPSS

CVSS 4.3 · medium

Is it mine?

3 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

In FreeBSD before 11.2-STABLE(r340268) and 11.2-RELEASE-p5, due to incorrectly accounting for padding on 64-bit platforms, a buffer underwrite could occur when constructing an ICMP reply packet when using a non-standard value for the net.inet.icmp.quotelen sysctl.

cvss

Technical severity, 0–10. One row per scoring source.

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.05.4mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimary

affected products (3)

Products and version ranges known to be affected.

FreeBSD FreeBSD≤ FreeBSD 11.2 before 11.2-RELEASE-p5enisa_euvdEU
freebsd freebsd< 11.2nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.2nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2018-11-28modified 2026-06-17

related (16,125)

Related entries.

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+16120 more

references (7)

External citations — patches, advisories, analysis.

https://security.freebsd.org/advisories/FreeBSD-EN-18:13.icmp.asc cnnvd
https://www.freebsd.org/security/advisories/FreeBSD-EN-18:13.icmp.ascPatchcnnvd
https://www.securityfocus.com/bid/106052 cnnvd
http://www.securityfocus.com/bid/106052 enisa_euvd
https://security.freebsd.org/advisories/FreeBSD-EN-18:13.icmp.asc enisa_euvd
http://www.securityfocus.com/bid/106052Third Party AdvisoryVDB Entrynvd
https://security.freebsd.org/advisories/FreeBSD-EN-18:13.icmp.ascExploitMitigationVendor Advisorynvd

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