CVE-2018-5095: canonical ubuntu_linux Integer Overflow or Wraparound
Vulnerability summary
CVE-2018-5095 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in canonical ubuntu_linux. EPSS estimates a 4.13% chance of exploitation in the next 30 days, higher than 90.6% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 19 · Related 9Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An integer overflow vulnerability in the Skia library when allocating memory for edge builders on some systems with at least 8 GB of RAM. This results in the use of uninitialized memory, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.13%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
-0.08 pp
From 4.21% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo 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.
- CWE-908Use of Uninitialized ResourceThe product uses or accesses a resource that has not been initialized.
Affected systems
Redhat6 products
- enterprise_linuxEOL6.0 | 7.0
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.3 | 7.4
- enterprise_linux_server_eus7.3 | 7.4 | 7.5
Debian3 products
- firefox-esr< 52.6.0esr-1
- thunderbird< 1:52.6.0-1
- debian_linuxEOL8.0 | 9.0
Mozilla3 products
- firefox≥ unspecified, < 58 | < 58.0 | < 52.6.0
- firefox_esr≥ unspecified, < 52.6
- thunderbird≥ unspecified, < 52.6 | < 52.6.0
Ubuntu2 products
- firefox< 58.0+build6-0ubuntu0.14.04.1 | < 58.0+build6-0ubuntu0.16.04.1 | < 59.0.1+build1-0ubuntu1
- thunderbird< 1:52.6.0+build1-0ubuntu0.14.04.1 | < 1:52.6.0+build1-0ubuntu0.16.04.1 | < 1:52.6.0+build1-0ubuntu1
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10
5 vendors · 15 products
References
19 links
lists.debian.org/debian-lts-announce/2018/01/msg00036.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 19 references
- lists.debian.org/debian-lts-announce/2018/01/msg00030.htmlMailing ListX Refsource MLISTThird Party Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=1418447X Refsource CONFIRMIssue TrackingPermissions RequiredVendor Advisory