CVE-2026-47336: Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules
Vulnerability summary
CVE-2026-47336 is a low (CVSS 3.3) Use of Uninitialized Variable vulnerability in canonical ubuntu_linux. EPSS estimates a 0.09% chance of exploitation in the next 30 days, higher than 0.5% of scored vulnerabilities.
Not severe (CVSS 3.3, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 28-05-2026PublishedVulnerability first disclosed.
- 28-05-2026Last modifiedVulnerability information updated.
Description
Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/AF_INET6 socket mediation code. The bug can be triggered by an unprivileged local user and could result in incorrect fine-grained mediation of network sockets.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated3.3LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- NVDNIST3.3LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
0.09%
Chance of exploitation in the next 30 days
Percentile
1%
Versus all other CVEs
30-day change
Decrease -0.04 pp
From 0.13% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu118 products
- linux< 6.8.0-124.124
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1057.60
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Canonical1 product
- ubuntu_linux≥ 6.8.0, < 6.8.0-124.124 | 6.8
2 vendors · 119 products