CVE-2018-17963: canonical ubuntu_linux Integer Overflow or Wraparound

Modified

AliasesUBUNTU-CVE-2018-17963DEBIAN-CVE-2018-17963

Published 09-10-2018Last modified 05-08-2024

Vulnerability summary

CVE-2018-17963 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in canonical ubuntu_linux. EPSS estimates a 4.65% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities.

Priority

Prioritisesevere

Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 5% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?

CVSS score

9.8/10

010

Critical · v3.1 (NVD)

EPSS score

4.65%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

09-10-2018
PublishedVulnerability first disclosed.
05-08-2024
Last modifiedVulnerability information updated.

Description

qemu_deliver_packet_iov in net/net.c in Qemu accepts packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact.

CVSS metrics

5 scores · 3 sources · 3 versions

v3.19.8v3.09.8v2.07.5

EPSS trend

Probability

4.65%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

No change 0.00 pp

From 4.65% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

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

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat3 products

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 | 3.1.0:rc0 | 3.1.0:rc1 | 3.1.0:rc2 | 3.1.0:rc3

Ubuntu1 product

qemu< 2.0.0+dfsg-2ubuntu1.44 | < 1:2.5+dfsg-5ubuntu10.33 | < 1:2.11+dfsg-1ubuntu7.8

5 vendors · 8 products

References

13 links

www.openwall.com/lists/oss-security/2018/10/08/1Mailing ListX Refsource MLISTThird Party Advisory
www.debian.org/security/2018/dsa-4338Vendor AdvisoryX Refsource DEBIANThird Party Advisory
lists.gnu.org/archive/html/qemu-devel/2018-09/msg03267.htmlMailing ListX Refsource MLISTPatchThird Party AdvisoryREPORT
usn.ubuntu.com/3826-1/Vendor AdvisoryX Refsource UBUNTUThird Party Advisory
lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing ListX Refsource MLISTThird Party Advisory
lists.gnu.org/archive/html/qemu-devel/2018-11/msg06054.htmlX Refsource MISCMailing ListPatchThird Party Advisory
access.redhat.com/errata/RHSA-2019:2166Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2019:2425Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2019:2553Vendor AdvisoryX Refsource REDHATThird Party Advisory
ubuntu.com/security/CVE-2018-17963REPORT

Show all 13 references

ubuntu.com/security/notices/USN-3826-1Advisory
www.cve.org/CVERecord?id=CVE-2018-17963REPORT
security-tracker.debian.org/tracker/CVE-2018-17963Advisory