Red Hat Enterprise Linux For Nvidia 26
Monthly
Local privilege escalation and denial of service in libvirt's NodeGetFreePages RPC handler allows an unprivileged local user to corrupt the root libvirtd daemon's heap memory through a crafted integer overflow. The CWE-190 flaw causes an undersized buffer allocation that is subsequently overwritten with real NUMA node data, enabling heap buffer overflow in a root-owned process. No public exploit code or CISA KEV listing exists at time of analysis, but the CVSS 7.8 score (AV:L/AC:L/PR:L) and full C/I/A impact make this a genuine priority on multi-tenant RHEL virtualization hosts.
Privilege escalation in libvirt's `virFileChownFiles()` function allows a process confined to the `swtpm` system user to coerce the root-level libvirtd daemon into reassigning ownership of any arbitrary file on the host to the `swtpm` user. The attack exploits a symlink-following flaw (CWE-59) in directory traversal logic that runs with root privileges, affecting libvirt as packaged across Red Hat Enterprise Linux 6 through 10 and RHEL for Nvidia 26. No public exploit has been identified at time of analysis, but the attack complexity is low once `swtpm`-user execution is obtained.
Local privilege escalation to root in the QEMU Guest Agent (qga) affects Red Hat Enterprise Linux 6 through 10, RHEL for NVIDIA 26, and OpenShift Container Platform 4, where a local unprivileged guest user abuses the guest-ssh-add-authorized-keys command handler through symlink manipulation to seize ownership of arbitrary root-owned files. Two attack variants exist - a deterministic directory-symlink bypass and a TOCTOU file-symlink race - both requiring an external management layer such as libvirt to invoke the code path. No public exploit is identified at time of analysis and it is not listed in CISA KEV, but the CVSS 7.3 rating and clean path to full root access make it a meaningful local escalation risk in multi-tenant virtualization estates.
Sensitive guest disk contents are exposed to any local user on Red Hat Enterprise Linux KVM hosts due to `qemu-img` creating new volume image files with world-readable permissions during libvirt storage clone or convert operations. Affected platforms span RHEL 6 through 10 and RHEL for Nvidia 26. No public exploit code has been identified and this vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog at time of analysis, but the CVSS C:H rating reflects full guest disk exposure to a low-privileged local attacker.
Out-of-bounds heap write in QEMU's virtio-blk device allows a high-privileged guest to crash the host QEMU process. The flaw exists because the virtio-blk device omits validation of input descriptor sizes prior to writing data, enabling a malicious guest operator to submit a crafted virtio-blk SCSI request that writes beyond the allocated host heap buffer. The primary confirmed impact is a denial of service (DoS) of the QEMU process on the host; no public exploit code has been identified at time of analysis and it is not listed in the CISA KEV catalog.
Local privilege escalation and denial of service in libvirt's NodeGetFreePages RPC handler allows an unprivileged local user to corrupt the root libvirtd daemon's heap memory through a crafted integer overflow. The CWE-190 flaw causes an undersized buffer allocation that is subsequently overwritten with real NUMA node data, enabling heap buffer overflow in a root-owned process. No public exploit code or CISA KEV listing exists at time of analysis, but the CVSS 7.8 score (AV:L/AC:L/PR:L) and full C/I/A impact make this a genuine priority on multi-tenant RHEL virtualization hosts.
Privilege escalation in libvirt's `virFileChownFiles()` function allows a process confined to the `swtpm` system user to coerce the root-level libvirtd daemon into reassigning ownership of any arbitrary file on the host to the `swtpm` user. The attack exploits a symlink-following flaw (CWE-59) in directory traversal logic that runs with root privileges, affecting libvirt as packaged across Red Hat Enterprise Linux 6 through 10 and RHEL for Nvidia 26. No public exploit has been identified at time of analysis, but the attack complexity is low once `swtpm`-user execution is obtained.
Local privilege escalation to root in the QEMU Guest Agent (qga) affects Red Hat Enterprise Linux 6 through 10, RHEL for NVIDIA 26, and OpenShift Container Platform 4, where a local unprivileged guest user abuses the guest-ssh-add-authorized-keys command handler through symlink manipulation to seize ownership of arbitrary root-owned files. Two attack variants exist - a deterministic directory-symlink bypass and a TOCTOU file-symlink race - both requiring an external management layer such as libvirt to invoke the code path. No public exploit is identified at time of analysis and it is not listed in CISA KEV, but the CVSS 7.3 rating and clean path to full root access make it a meaningful local escalation risk in multi-tenant virtualization estates.
Sensitive guest disk contents are exposed to any local user on Red Hat Enterprise Linux KVM hosts due to `qemu-img` creating new volume image files with world-readable permissions during libvirt storage clone or convert operations. Affected platforms span RHEL 6 through 10 and RHEL for Nvidia 26. No public exploit code has been identified and this vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog at time of analysis, but the CVSS C:H rating reflects full guest disk exposure to a low-privileged local attacker.
Out-of-bounds heap write in QEMU's virtio-blk device allows a high-privileged guest to crash the host QEMU process. The flaw exists because the virtio-blk device omits validation of input descriptor sizes prior to writing data, enabling a malicious guest operator to submit a crafted virtio-blk SCSI request that writes beyond the allocated host heap buffer. The primary confirmed impact is a denial of service (DoS) of the QEMU process on the host; no public exploit code has been identified at time of analysis and it is not listed in the CISA KEV catalog.