CVE-2023-5088
A bug in QEMU could cause a guest I/O operation otherwise addressed to an arbitrary disk offset to be targeted to offset 0 instead (potentially overwriting the VM's boot code).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A bug in QEMU could cause a guest I/O operation otherwise addressed to an arbitrary disk offset to be targeted to offset 0 instead (potentially overwriting the VM's boot code). This could be used, for example, by L2 guests with a virtual disk (vdiskL2) stored on a virtual disk of an L1 (vdiskL1) hypervisor to read and/or write data to LBA 0 of vdiskL1, potentially gaining control of L1 at its next reboot.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-821, CWE-662
- Affected
- qemu/qemu · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2024:2135
- https://access.redhat.com/errata/RHSA-2024:2962
- https://access.redhat.com/security/cve/CVE-2023-5088Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2247283Issue Tracking, Patch
- https://lore.kernel.org/all/20230921160712.99521-1-simon.rowe@nutanix.com/T/Mailing List, Patch
- https://access.redhat.com/errata/RHSA-2024:2135
- https://access.redhat.com/errata/RHSA-2024:2962
- https://access.redhat.com/security/cve/CVE-2023-5088Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2247283Issue Tracking, Patch
- https://lists.debian.org/debian-lts-announce/2024/03/msg00012.html
- https://lists.debian.org/debian-lts-announce/2025/04/msg00042.html
- https://lore.kernel.org/all/20230921160712.99521-1-simon.rowe@nutanix.com/T/Mailing List, Patch
- https://security.netapp.com/advisory/ntap-20231208-0005/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.