CVE-2016-4580: canonical ubuntu_linux
Vulnerability summary
CVE-2016-4580 is a high (CVSS 7.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 4.06% chance of exploitation in the next 30 days, higher than 90.6% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 12Timeline
- 23-05-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The x25_negotiate_facilities function in net/x25/x25_facilities.c in the Linux kernel before 4.5.5 does not properly initialize a certain data structure, which allows attackers to obtain sensitive information from kernel stack memory via an X.25 Call Request.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
4.06%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.06% 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: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu7 products
- linux< 3.13.0-91.138 | < 4.4.0-28.47
- linux-lts-utopic< 3.16.0-76.98~14.04.1
- linux-lts-vivid< 3.19.0-64.72~14.04.1
- linux-lts-wily< 4.2.0-41.48~14.04.1
- linux-lts-xenial< 4.4.0-28.47~14.04.1
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 15.10 | 16.04
Debian1 product
- linux< 4.5.5-1
Linux1 product
- linux_kernel≤ 4.5.4
4 vendors · 10 products
References
38 links- github.com/torvalds/linux/commit/79e48650320e6fba48369fccf13fd045315b19b8X Refsource CONFIRMVendor Advisory
