CVE-2019-19344: canonical ubuntu_linux Use After Free
Vulnerability summary
CVE-2019-19344 is a medium (CVSS 6.5) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 2.76% chance of exploitation in the next 30 days, higher than 86.2% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 5Timeline
- 21-01-2020PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x versions before 4.11.5, essentially due to a call to realloc() while other local variables still point at the original buffer.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.76%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.76% 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, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Synology4 products
Alpine1 product
- samba≥ 4.9.0, < 4.10.12-r0 | ≥ 4.9.0, < 4.11.5-r0
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 19.04 | 19.10
Debian1 product
- samba< 2:4.11.5+dfsg-1
Opensuse1 product
- leapEOL15.1
Red hat1 product
- sambaall samba 4.11.x versions before 4.11.5 | all samba 4.10.x versions before 4.10.12 | all samba 4.9.x versions before 4.9.18
Samba1 product
- samba≥ 4.9.0, < 4.9.18 | ≥ 4.10.0, < 4.10.12 | ≥ 4.11.0, < 4.11.5
Ubuntu1 product
- samba< 2:4.3.11+dfsg-0ubuntu0.16.04.24 | < 2:4.7.6+dfsg~ubuntu-0ubuntu2.14
8 vendors · 11 products
References
15 links- security.netapp.com/advisory/ntap-20200122-0001/Third Party Advisory
- www.synology.com/security/advisory/Synology_SA_20_01Third Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00055.htmlVendor AdvisoryThird Party Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- security.gentoo.org/glsa/202003-52Vendor Advisory
