CVE-2018-10839: canonical ubuntu_linux Stack-based Buffer Overflow
Vulnerability summary
CVE-2018-10839 is a medium (CVSS 6.5) Stack-based Buffer Overflow vulnerability in canonical ubuntu_linux. EPSS estimates a 3.08% chance of exploitation in the next 30 days, higher than 87.7% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 18 · Related 15Timeline
- 16-10-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Qemu emulator <= 3.0.0 built with the NE2000 NIC emulation support is vulnerable to an integer overflow, which could lead to buffer overflow issue. It could occur when receiving packets over the network. A user inside guest could use this flaw to crash the Qemu process resulting in DoS.
CVSS metrics
5 scores · 4 sources · 2 versions- NVDNIST6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.08%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.08% 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
1 foundExploit Reference (lists.gnu.org)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowThe product writes past the end of a buffer that was allocated on the stack.
- CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
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≤ 3.0.0
The qemu project1 product
- qemu-kvm≤ 3.0.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.44 | < 1:2.5+dfsg-5ubuntu10.33 | < 1:2.11+dfsg-1ubuntu7.8
5 vendors · 6 products
References
11 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10839X Refsource CONFIRMIssue TrackingThird Party Advisory
- lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.gnu.org/archive/html/qemu-devel/2018-09/msg03273.htmlMailing ListX Refsource MLISTExploitThird Party AdvisoryREPORT