CVE-2026-18917
CVE-2026-18917 · Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
A flaw was found in libvirt. An unprivileged local user could exploit an integer overflow vulnerability in the NodeGetFreePages RPC handler. This flaw allows crafted values to bypass a size check, leading to an undersized memory buffer. Subsequently, real NUMA node data can overwrite this buffer. This heap buffer overflow can corrupt the root libvirt daemon's memory, potentially leading to a denial of service or local privilege escalation.
CVSS 7.8 · High · EPSS 0.2% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
red hat enterprise linux 10
- Versions
- ≥ 0:11.10.0-12.9.el10_2: Not affected (rpm)
No fix published
red hat enterprise linux 10.0 extended update support
- Versions
- ≥ 0:10.10.0-8.12.el10_0: Not affected (rpm)
No fix published
red hat enterprise linux 7 extended lifecycle support
- Versions
- ≥ 0:4.5.0-36.el7_9.7: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 advanced mission critical update support
- Versions
- ≥ 8040020260916092751.522a0ee4: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 extended update support long-life add-on
- Versions
- ≥ 8040020260916092751.522a0ee4: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 advanced mission critical update support
- Versions
- ≥ 8060020260910092451.ad008a3a: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 extended update support long-life add-on
- Versions
- ≥ 8060020260910092451.ad008a3a: Not affected (rpm)
No fix published
red hat enterprise linux 8.8 telecommunications update service
- Versions
- ≥ 8080020260910092120.63b34585: Not affected (rpm)
No fix published
red hat enterprise linux 8.8 update services for sap solutions
- Versions
- ≥ 8080020260910092120.63b34585: Not affected (rpm)
No fix published
red hat enterprise linux 9
- Versions
- ≥ 0:11.10.0-12.7.el9_8: Not affected (rpm)
No fix published
red hat enterprise linux 9.2 update services for sap solutions
- Versions
- ≥ 0:9.0.0-10.17.el9_2: Not affected (rpm)
No fix published
red hat enterprise linux 9.4 update services for sap solutions
- Versions
- ≥ 0:10.0.0-6.24.el9_4: Not affected (rpm)
No fix published
red hat enterprise linux 9.6 extended update support
- Versions
- ≥ 0:10.10.0-7.19.el9_6: Not affected (rpm)
No fix published
red hat enterprise linux 6
No fix published
red hat enterprise linux 8
No fix published
red hat enterprise linux for nvidia 26
No fix published
libvirt Debian:12
- Versions
- 10.0.0-1
- 10.0.0-2
- 10.0.0-3
- 10.1.0-1
- 10.10.0-1
- 10.10.0-2
- 10.10.0-3
- 10.10.0-4
- 10.2.0-1
- 10.3.0-1
- 10.3.0-2
- 10.3.0-3
- 10.4.0-1
- 10.5.0-1
- 10.6.0-1
- 10.6.0-2
- 10.6.0-3
- 10.7.0-1
- 10.7.0-2
- 10.7.0-3
- 10.8.0-1
- 10.9.0-1
- 10.9.0-2
- 11.0.0-1
- 11.0.0-2
- 11.1.0-1
- 11.1.0-2
- 11.10.0-1
- 11.10.0-2
- 11.2.0-1
- 11.2.0-2
- 11.2.0-3
- 11.3.0-1
- 11.3.0-2
- 11.3.0-2~bpo12+1
- 11.3.0-3
- 11.4.0-1
- 11.5.0-1
- 11.6.0-1
- 11.7.0-1
- 11.8.0-1
- 11.8.0-2
- 11.9.0-1
- 11.9.0-2
- 12.0.0-1
- 12.1.0-1
- 12.2.0-1
- 12.3.0-1
- 12.4.0-1
- 12.5.0-1
- 12.6.0-1
- 12.7.0-1
- 12.8.0-1
- 9.0.0-4
- 9.0.0-4+deb12u1
- 9.0.0-4+deb12u2
- 9.1.0-1
- 9.10.0-1
- 9.2.0-1
- 9.2.0-2
- 9.3.0-1
- 9.3.0-2
- 9.4.0-1
- 9.5.0-1
- 9.5.0-2
- 9.6.0-1
- 9.6.0-2
- 9.6.0-3
- 9.7.0-1
- 9.8.0-1
- 9.8.0-2
- 9.9.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libvirt Debian:13
- Versions
- 11.3.0-3
- 11.3.0-3+deb13u1
- 11.3.0-3+deb13u2
- Affected ranges
- ECOSYSTEM: < 11.3.0-3+deb13u3
Update to 11.3.0-3+deb13u3
libvirt Debian:14
- Versions
- 11.10.0-1
- 11.10.0-2
- 11.3.0-3
- 11.4.0-1
- 11.5.0-1
- 11.6.0-1
- 11.7.0-1
- 11.8.0-1
- 11.8.0-2
- 11.9.0-1
- 11.9.0-2
- 12.0.0-1
- 12.1.0-1
- 12.2.0-1
- 12.3.0-1
- 12.4.0-1
- 12.5.0-1
- 12.6.0-1
- Affected ranges
- ECOSYSTEM: < 12.7.0-1
Update to 12.7.0-1
libvirt Ubuntu:Pro:14.04:LTS
- Versions
- 1.1.1-0ubuntu8
- 1.1.1-0ubuntu9
- 1.1.4-0ubuntu2
- 1.1.4-0ubuntu3
- 1.1.4-0ubuntu4
- 1.1.4-0ubuntu5
- 1.2.0-0ubuntu1
- 1.2.0-0ubuntu2
- 1.2.0-0ubuntu3
- 1.2.1-0ubuntu1
- 1.2.1-0ubuntu2
- 1.2.1-0ubuntu3
- 1.2.1-0ubuntu4
- 1.2.1-0ubuntu5
- 1.2.1-0ubuntu7
- 1.2.1-0ubuntu8
- 1.2.1-0ubuntu9
- 1.2.1-0ubuntu10
- 1.2.2-0ubuntu1
- 1.2.2-0ubuntu2
- 1.2.2-0ubuntu3
- 1.2.2-0ubuntu4
- 1.2.2-0ubuntu5
- 1.2.2-0ubuntu6
- 1.2.2-0ubuntu7
- 1.2.2-0ubuntu8
- 1.2.2-0ubuntu9
- 1.2.2-0ubuntu10
- 1.2.2-0ubuntu11
- 1.2.2-0ubuntu12
- 1.2.2-0ubuntu13
- 1.2.2-0ubuntu13.1
- 1.2.2-0ubuntu13.1.1
- 1.2.2-0ubuntu13.1.2
- 1.2.2-0ubuntu13.1.4
- 1.2.2-0ubuntu13.1.5
- 1.2.2-0ubuntu13.1.6
- 1.2.2-0ubuntu13.1.7
- 1.2.2-0ubuntu13.1.8
- 1.2.2-0ubuntu13.1.9
- 1.2.2-0ubuntu13.1.10
- 1.2.2-0ubuntu13.1.12
- 1.2.2-0ubuntu13.1.14
- 1.2.2-0ubuntu13.1.16
- 1.2.2-0ubuntu13.1.17
- 1.2.2-0ubuntu13.1.20
- 1.2.2-0ubuntu13.1.21
- 1.2.2-0ubuntu13.1.22
- 1.2.2-0ubuntu13.1.23
- 1.2.2-0ubuntu13.1.25
- 1.2.2-0ubuntu13.1.26
- 1.2.2-0ubuntu13.1.27
- 1.2.2-0ubuntu13.1.28
- 1.2.2-0ubuntu13.1.28+esm1
- 1.2.2-0ubuntu13.1.28+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libvirt Ubuntu:Pro:16.04:LTS
- Versions
- 1.2.16-2ubuntu11
- 1.2.16-2ubuntu12
- 1.2.16-2ubuntu13
- 1.2.16-2ubuntu14
- 1.2.21-2ubuntu1
- 1.2.21-2ubuntu3
- 1.2.21-2ubuntu4
- 1.2.21-2ubuntu5
- 1.2.21-2ubuntu7
- 1.2.21-2ubuntu8
- 1.2.21-2ubuntu9
- 1.2.21-2ubuntu10
- 1.3.1-1ubuntu1
- 1.3.1-1ubuntu2
- 1.3.1-1ubuntu3
- 1.3.1-1ubuntu4
- 1.3.1-1ubuntu6
- 1.3.1-1ubuntu9
- 1.3.1-1ubuntu10
- 1.3.1-1ubuntu10.1
- 1.3.1-1ubuntu10.2
- 1.3.1-1ubuntu10.3
- 1.3.1-1ubuntu10.5
- 1.3.1-1ubuntu10.6
- 1.3.1-1ubuntu10.7
- 1.3.1-1ubuntu10.8
- 1.3.1-1ubuntu10.10
- 1.3.1-1ubuntu10.11
- 1.3.1-1ubuntu10.12
- 1.3.1-1ubuntu10.13
- 1.3.1-1ubuntu10.14
- 1.3.1-1ubuntu10.15
- 1.3.1-1ubuntu10.17
- 1.3.1-1ubuntu10.18
- 1.3.1-1ubuntu10.19
- 1.3.1-1ubuntu10.21
- 1.3.1-1ubuntu10.22
- 1.3.1-1ubuntu10.23
- 1.3.1-1ubuntu10.24
- 1.3.1-1ubuntu10.25
- 1.3.1-1ubuntu10.26
- 1.3.1-1ubuntu10.27
- 1.3.1-1ubuntu10.29
- 1.3.1-1ubuntu10.30
- 1.3.1-1ubuntu10.31
- 1.3.1-1ubuntu10.31+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libvirt Ubuntu:Pro:18.04:LTS
- Versions
- 3.6.0-1ubuntu5
- 3.6.0-1ubuntu6
- 4.0.0-1ubuntu1
- 4.0.0-1ubuntu2
- 4.0.0-1ubuntu3
- 4.0.0-1ubuntu4
- 4.0.0-1ubuntu5
- 4.0.0-1ubuntu6
- 4.0.0-1ubuntu7
- 4.0.0-1ubuntu8
- 4.0.0-1ubuntu8.1
- 4.0.0-1ubuntu8.2
- 4.0.0-1ubuntu8.3
- 4.0.0-1ubuntu8.4
- 4.0.0-1ubuntu8.5
- 4.0.0-1ubuntu8.6
- 4.0.0-1ubuntu8.7
- 4.0.0-1ubuntu8.8
- 4.0.0-1ubuntu8.9
- 4.0.0-1ubuntu8.10
- 4.0.0-1ubuntu8.11
- 4.0.0-1ubuntu8.12
- 4.0.0-1ubuntu8.13
- 4.0.0-1ubuntu8.14
- 4.0.0-1ubuntu8.15
- 4.0.0-1ubuntu8.16
- 4.0.0-1ubuntu8.17
- 4.0.0-1ubuntu8.19
- 4.0.0-1ubuntu8.20
- 4.0.0-1ubuntu8.21
- 4.0.0-1ubuntu8.21+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libvirt Ubuntu:Pro:20.04:LTS
- Versions
- 5.4.0-0ubuntu5
- 6.0.0-0ubuntu1
- 6.0.0-0ubuntu2
- 6.0.0-0ubuntu3
- 6.0.0-0ubuntu4
- 6.0.0-0ubuntu5
- 6.0.0-0ubuntu6
- 6.0.0-0ubuntu7
- 6.0.0-0ubuntu8
- 6.0.0-0ubuntu8.1
- 6.0.0-0ubuntu8.2
- 6.0.0-0ubuntu8.3
- 6.0.0-0ubuntu8.4
- 6.0.0-0ubuntu8.5
- 6.0.0-0ubuntu8.7
- 6.0.0-0ubuntu8.8
- 6.0.0-0ubuntu8.9
- 6.0.0-0ubuntu8.10
- 6.0.0-0ubuntu8.11
- 6.0.0-0ubuntu8.12
- 6.0.0-0ubuntu8.13
- 6.0.0-0ubuntu8.14
- 6.0.0-0ubuntu8.15
- 6.0.0-0ubuntu8.16
- 6.0.0-0ubuntu8.19
- 6.0.0-0ubuntu8.20
- 6.0.0-0ubuntu8.20+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libvirt Ubuntu:22.04:LTS
- Versions
- 7.6.0-0ubuntu1
- 7.6.0-0ubuntu3
- 8.0.0-1ubuntu3
- 8.0.0-1ubuntu4
- 8.0.0-1ubuntu5
- 8.0.0-1ubuntu6
- 8.0.0-1ubuntu7
- 8.0.0-1ubuntu7.1
- 8.0.0-1ubuntu7.2
- 8.0.0-1ubuntu7.3
- 8.0.0-1ubuntu7.4
- 8.0.0-1ubuntu7.5
- 8.0.0-1ubuntu7.6
- 8.0.0-1ubuntu7.7
- 8.0.0-1ubuntu7.8
- 8.0.0-1ubuntu7.9
- 8.0.0-1ubuntu7.10
- 8.0.0-1ubuntu7.11
- 8.0.0-1ubuntu7.12
- 8.0.0-1ubuntu7.13
- 8.0.0-1ubuntu7.14
- 8.0.0-1ubuntu7.15
- 8.0.0-1ubuntu7.16
- 8.0.0-1ubuntu7.17
- 8.0.0-1ubuntu7.18
- 8.0.0-1ubuntu7.19
- 8.0.0-1ubuntu7.20
- Affected ranges
- ECOSYSTEM: < 8.0.0-1ubuntu7.21
Update to 8.0.0-1ubuntu7.21
Original sources
- https://access.redhat.com/errata/RHSA-2026:68509
- https://access.redhat.com/errata/RHSA-2026:68510
- https://access.redhat.com/errata/RHSA-2026:68511
- https://access.redhat.com/errata/RHSA-2026:68513
- https://access.redhat.com/errata/RHSA-2026:68514
- https://access.redhat.com/errata/RHSA-2026:68594
- https://access.redhat.com/errata/RHSA-2026:69114
- https://access.redhat.com/errata/RHSA-2026:69131
- https://access.redhat.com/errata/RHSA-2026:74424
- https://access.redhat.com/errata/RHSA-2026:75583
- https://access.redhat.com/security/cve/CVE-2026-18917
- https://bugzilla.redhat.com/show_bug.cgi?id=2520161
- https://nvd.nist.gov/vuln/detail/CVE-2026-18917