ALSA-2021:1762 (CVE-2020-11947)
Vulnerability from osv_almalinux – Published: 2021-05-18 06:02 – Updated: 2026-11-02 02:00 – Source website
VLAI
Summary
Moderate: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update
Details
Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.
Security Fix(es):
-
libvirt: double free in qemuAgentGetInterfaces() in qemu_agent.c (CVE-2020-25637)
-
QEMU: heap buffer overflow in msix_table_mmio_write() in hw/pci/msix.c (CVE-2020-27821)
-
QEMU: ide: atapi: OOB access while processing read commands (CVE-2020-29443)
-
QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure (CVE-2020-11947)
-
QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c (CVE-2020-16092)
-
QEMU: infinite loop in e1000e_write_packet_to_guest() in hw/net/e1000e_core.c (CVE-2020-25707)
-
QEMU: assertion failure through usb_packet_unmap() in hw/usb/hcd-ehci.c (CVE-2020-25723)
-
QEMU: e1000e: infinite loop scenario in case of null packet descriptor (CVE-2020-28916)
-
QEMU: slirp: out-of-bounds access while processing ARP/NCSI packets (CVE-2020-29129, CVE-2020-29130)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.
References
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]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "python3-libvirt"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.0-1.module_el8.5.0+2608+72063365"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "ruby-hivex"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.3.18-20.module_el8.3.0+2048+e7a0a3ea"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "seabios"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
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}
],
"type": "ECOSYSTEM"
}
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"ecosystem": "AlmaLinux:8",
"name": "seabios-bin"
},
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]
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{
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"ecosystem": "AlmaLinux:8",
"name": "seavgabios-bin"
},
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],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "sgabios"
},
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{
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},
{
"fixed": "1:0.20170427git-3.module_el8.5.0+2608+72063365"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "sgabios"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "sgabios-bin"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:0.20170427git-3.module_el8.5.0+2608+72063365"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "sgabios-bin"
},
"ranges": [
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"events": [
{
"introduced": "0"
},
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"fixed": "1:0.20170427git-3.module_el8.6.0+2880+7d9e3703"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "supermin"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.1.19-10.module_el8.5.0+2608+72063365"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "supermin-devel"
},
"ranges": [
{
"events": [
{
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},
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"fixed": "5.1.19-10.module_el8.5.0+2608+72063365"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"details": "Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.\n\nSecurity Fix(es):\n\n* libvirt: double free in qemuAgentGetInterfaces() in qemu_agent.c (CVE-2020-25637)\n\n* QEMU: heap buffer overflow in msix_table_mmio_write() in hw/pci/msix.c (CVE-2020-27821)\n\n* QEMU: ide: atapi: OOB access while processing read commands (CVE-2020-29443)\n\n* QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure (CVE-2020-11947)\n\n* QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c (CVE-2020-16092)\n\n* QEMU: infinite loop in e1000e_write_packet_to_guest() in hw/net/e1000e_core.c (CVE-2020-25707)\n\n* QEMU: assertion failure through usb_packet_unmap() in hw/usb/hcd-ehci.c (CVE-2020-25723)\n\n* QEMU: e1000e: infinite loop scenario in case of null packet descriptor (CVE-2020-28916)\n\n* QEMU: slirp: out-of-bounds access while processing ARP/NCSI packets (CVE-2020-29129, CVE-2020-29130)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.",
"id": "ALSA-2021:1762",
"modified": "2026-11-02T02:00:27Z",
"published": "2021-05-18T06:02:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2021:1762"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1384241"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1798463"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1828952"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1834281"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1837495"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1843852"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1846975"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1850680"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1859494"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1860283"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1872854"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1874304"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1874780"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1876297"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1876742"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1880418"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1880546"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1881037"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1884531"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1893895"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1898579"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1901837"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1902231"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1902651"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1902960"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1903064"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1910220"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1910267"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1910326"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1912765"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1917446"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/1918708"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/8/ALSA-2021-1762.html"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-11947"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-16092"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-25637"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-25707"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-25723"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-27821"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-28916"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-29129"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-29130"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-29443"
}
],
"related": [
"CVE-2020-11947",
"CVE-2020-16092",
"CVE-2020-25637",
"CVE-2020-25707",
"CVE-2020-25723",
"CVE-2020-27821",
"CVE-2020-28916",
"CVE-2020-29129",
"CVE-2020-29130",
"CVE-2020-29443"
],
"schema_version": "1.7.0",
"summary": "Moderate: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update",
"upstream": [
"CVE-2020-11947",
"CVE-2020-16092",
"CVE-2020-25637",
"CVE-2020-25707",
"CVE-2020-25723",
"CVE-2020-27821",
"CVE-2020-28916",
"CVE-2020-29129",
"CVE-2020-29130",
"CVE-2020-29443"
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.