7.8
High
CVE-2026-18917 Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
Description
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 3.1 detail
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitable with local access to the machine, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Enterprise Linux for NVIDIA 26 | Versions not published | |
| Red Hat Enterprise Linux 10.0 Extended Update Support | Versions not published | |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020260910092120.63 | earliest → < 8080020260910092120.63b34585 | 8080020260910092120.63b34585 |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020260910092120.63 | earliest → < 8080020260910092120.63b34585 | 8080020260910092120.63b34585 |
Show the 8 other branches Hide the 8 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | Versions not published | |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | Versions not published | |
| Red Hat Enterprise Linux 9.6 Extended Update Support | Versions not published | |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020260910092451 | earliest → < 8060020260910092451.ad008a3a | 8060020260910092451.ad008a3a |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020260910092451 | earliest → < 8060020260910092451.ad008a3a | 8060020260910092451.ad008a3a |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | Versions not published | |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020260916092751.522 | earliest → < 8040020260916092751.522a0ee4 | 8040020260916092751.522a0ee4 |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020260916092751.522 | earliest → < 8040020260916092751.522a0ee4 | 8040020260916092751.522a0ee4 |
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