CVE-2016-4558: canonical ubuntu_linux
Vulnerability summary
CVE-2016-4558 is a high (CVSS 7.0) vulnerability in canonical ubuntu_linux. EPSS estimates a 0.86% chance of exploitation in the next 30 days, higher than 58.7% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (exploit-database, 04-05-2016)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 4Timeline
- 23-05-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The BPF subsystem in the Linux kernel before 4.5.5 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted application on (1) a system with more than 32 Gb of memory, related to the program reference count or (2) a 1 Tb system, related to the map reference count.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.86%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.86% 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 foundLinux Kernel (Ubuntu 16.04) - Reference Count Overflow Using BPF Maps
Maturity: poc
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu4 products
- linux< 4.4.0-24.43
- linux-lts-xenial< 4.4.0-24.43~14.04.1
- linux-raspi2< 4.4.0-1012.16
- linux-snapdragon< 4.4.0-1015.18
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04
Debian1 product
- linux< 4.5.3-1
Linux1 product
- linux_kernel≥ 4.4, < 4.4.11 | ≥ 4.5, < 4.5.5
4 vendors · 7 products
References
16 links- github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106eX Refsource CONFIRMVendor Advisory
