CVE-2018-11806: canonical ubuntu_linux Out-of-bounds Write
Vulnerability summary
CVE-2018-11806 is a high (CVSS 8.2) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 0.81% chance of exploitation in the next 30 days, higher than 56.8% of scored vulnerabilities.
Not severe (CVSS 8.2, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 21 · Related 17Timeline
- 13-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
m_cat in slirp/mbuf.c in Qemu has a heap-based buffer overflow via incoming fragmented datagrams.
CVSS metrics
6 scores · 4 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated8.2HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.2HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated8.2HighCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.81%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
Decrease -0.02 pp
From 0.82% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat18 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_eus7.5 | 7.6 | 7.7
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.6 | 7.7
- enterprise_linux_server_tus7.6 | 7.7
Debian2 products
- qemu< 1:3.1+dfsg-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10
Qemu1 product
- qemu≤ 2.12.1
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.44 | < 1:2.5+dfsg-5ubuntu10.33 | < 1:2.11+dfsg-1ubuntu7.8
5 vendors · 23 products
References
25 links- access.redhat.com/errata/RHSA-2018:2762Vendor AdvisoryX Refsource REDHATThird Party AdvisoryAdvisory
- lists.gnu.org/archive/html/qemu-devel/2018-06/msg01012.htmlMailing ListX Refsource MLISTThird Party AdvisoryREPORT
- bugzilla.redhat.com/show_bug.cgi?id=1586245X Refsource CONFIRMIssue TrackingPatchThird Party AdvisoryREPORT
- access.redhat.com/errata/RHSA-2018:2822Vendor AdvisoryX Refsource REDHATThird Party AdvisoryAdvisory
- access.redhat.com/errata/RHSA-2018:2887Vendor AdvisoryX Refsource REDHATThird Party AdvisoryAdvisory
Show all 25 references
lists.debian.org/debian-lts-announce/2019/05/msg00010.htmlMailing ListX Refsource MLISTThird Party Advisory