CVE-2019-3900: canonical ubuntu_linux Loop with Unreachable Exit Condition
Vulnerability summary
CVE-2019-3900 is a high (CVSS 7.7) Loop with Unreachable Exit Condition vulnerability in canonical ubuntu_linux. EPSS estimates a 4.35% chance of exploitation in the next 30 days, higher than 91.2% of scored vulnerabilities.
Not severe (CVSS 6.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 27 · Related 14Timeline
- 25-04-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An infinite loop issue was found in the vhost_net kernel module in Linux Kernel up to and including v5.1-rc6, while handling incoming packets in handle_rx(). It could occur if one end sends packets faster than the other end can process them. A guest user, maybe remote one, could use this flaw to stall the vhost_net kernel thread, resulting in a DoS scenario.
CVSS metrics
9 scores · 5 sources · 4 versions- OSV · UbuntuEcosystem advisory · calculated7.7HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.7HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- OSV · Red hatEcosystem advisory · calculated6.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
- NVDNIST6.3MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
4.35%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.35% 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.
Ubuntu27 products
- linuxAll versions (No fix recorded) | < 4.15.0-60.67
- linux-awsAll versions (No fix recorded) | < 4.15.0-1047.49
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1047.49~16.04.1
- linux-azure< 4.15.0-1059.64~14.04.1 | < 4.15.0-1056.61 | < 5.0.0-1018.19~18.04.1
Redhat21 products
- enterprise_linuxEOL6.0 | 7.0
- kernel< 0:4.14.0-115.10.1.el7a
- kernel-abi-whitelists< 0:4.14.0-115.10.1.el7a
- kernel-alt< 0:4.14.0-115.10.1.el7a
- kernel-bootwrapper< 0:4.14.0-115.10.1.el7a
Netapp8 products
- active_iq_unified_manager_for_vmware_vsphere≥ 9.5 (No fix recorded)
- cn1610_firmwarena
- hci_management_nodena
- snapprotectna
- solidfirena
Debian2 products
- linux< 5.2.6-1
- debian_linuxEOL8.0 | 9.0 | 10.0
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 19.04
Fedoraproject1 product
- fedoraEOL29 | 30 | 28
Linux1 product
- linux_kernel≥ 2.6.34, < 3.16.72 | ≥ 3.17, < 4.4.191 | ≥ 4.5, < 4.9.190 | ≥ 4.10, < 4.14.133 | ≥ 4.15, < 4.19.64 | ≥ 4.20, < 5.2
Oracle1 product
- sd-wan_edge8.2
Red hat1 product
- kernelaffects up to and including v5.1-rc6
9 vendors · 63 products
References
44 links- access.redhat.com/errata/RHSA-2019:1973Vendor AdvisoryX Refsource REDHATAdvisoryThird Party Advisory
- lists.debian.org/debian-lts-announce/2019/08/msg00016.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 44 references
- lists.debian.org/debian-lts-announce/2019/08/msg00017.htmlMailing ListX Refsource MLISTThird Party Advisory
- packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlX Refsource MISCPatchThird Party AdvisoryVDB Entry
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3900X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
