kernel security update

4.18.0-553.173.1 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list olkmodsigningkey.pem Orabug: 29539237 - Update x509.genkey Orabug: 24817676 - Conflict with shim-ia32 and...

Ubuntu 24.04 LTS : Linux kernel vulnerabilities (USN-8917-1)

"The remote Ubuntu 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8917-1 advisory. It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local...

Ubuntu 26.04 LTS : Linux kernel vulnerabilities (USN-8887-1)

"The remote Ubuntu 26.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8887-1 advisory. It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local...

Ubuntu 26.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8888-1)

"The remote Ubuntu 26.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8888-1 advisory. It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local...

CVE-2026-79608 x86/AMD: ineffectual Zenbleed workaround

The workaround for XSA-433 Zenbleed, CVE-2023-20593 was later re-worked to better integrate with other manipulations of the same MSR. In this rework an inverted conditional was introduced, resulting in the workaround to not be applied when needed and vice versa. For more details, see:...

CVE-2026-79608

The Xen hypervisor is affected by CVE-2026-79608 , which was introduced due to an inverted conditional during a rework of the workaround for XSA-433 (Zenbleed, CVE-2023-20593) . This error causes the workaround to be applied incorrectly or not at all when manipulating the same MSR . Vulnerabiliti...

CVE-2026-90238

A flaw was found in the Linux kernel's AMD ISP4 media driver. During the initialization process, a self-deadlock can occur if the isp4sdpwronandinit function attempts to re-acquire a mutex it already holds. This issue can lead to a system deadlock, resulting in a Denial of Service DoS for the...

USN-8918-1 linux-azure, linux-azure-fde, linux-azure-fips vulnerabilities

It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local attacker with hypervisor access could possibly use this to trigger an out-of-bounds condition and compromise the integrity of SEV-SNP guest memory...

USN-8918-1: Linux kernel (Azure) vulnerabilities

It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local attacker with hypervisor access could possibly use this to trigger an out-of-bounds condition and compromise the integrity of SEV-SNP guest memory...

CVE-2026-90289

A flaw was found in the drm/amd/display component of the Linux kernel. An off-by-one error in the sizing of Multi-Stream Transport MST High-bandwidth Digital Content Protection HDCP per-connector arrays could lead to incorrect array handling. This issue stems from a discrepancy between the intend...

CVE-2026-90286

A flaw was found in the Linux kernel's AMD GPU Graphics Processing Unit driver, specifically affecting GFX6 series GPUs. This vulnerability stems from incorrect handling of the Pre-Fetch Parser PFP on compute queues, which can lead to synchronization issues. An attacker could potentially exploit...

USN-8917-1 linux, linux-aws, linux-aws-fips, linux-fips, linux-gcp, linux-gcp-fips, linux-gke, linux-gkeop, linux-ibm, linux-lowlatency, linux-oracle, linux-realtime vulnerabilities

It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local attacker with hypervisor access could possibly use this to trigger an out-of-bounds condition and compromise the integrity of SEV-SNP guest memory...

USN-8917-1: Linux kernel vulnerabilities

It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local attacker with hypervisor access could possibly use this to trigger an out-of-bounds condition and compromise the integrity of SEV-SNP guest memory...

x86/AMD: ineffectual Zenbleed workaround

ISSUE DESCRIPTION The workaround for XSA-433 Zenbleed, CVE-2023-20593 was later re-worked to better integrate with other manipulations of the same MSR. In this rework an inverted conditional was introduced, resulting in the workaround to not be applied when needed and vice versa. For more details...

kernel: drm/amd/display: set new_stream to NULL after release

A flaw was found in the Linux kernel's drm/amd/display component. Specifically, within the dmupdatecrtcstate function, a stream pointer is released but not subsequently set to NULL. This can lead to a double release of the same pointer if an error occurs later in the process, creating a...

ROS-20261013-73-0494

The vulnerability of the amdgputtminitonchip function in the drivers/gpu/drm/amd/amdgpu/amdgputtm.c driver for AMD GPU cores in Linux operating systems is related to improper resource release. Exploiting this vulnerability can allow a remote attacker to cause service interruptions...

CVE-2026-98270

A flaw was found in the Linux kernel's AMD GPU driver. The driver fails to verify that internal reliability and error-handling structures are initialized before accessing them during interrupt handling. If an interrupt occurs during this early startup window, the driver encounters a null pointer...

USN-8887-3 linux-gcp-7.0, linux-hwe-7.0, linux-oracle-7.0 vulnerabilities

It was discovered that some AMD processors did not properly perform Reverse Map Table RMP checks when the IOMMU accessed certain host buffers. A local attacker with hypervisor access could possibly use this to trigger an out-of-bounds condition and compromise the integrity of SEV-SNP guest memory...

CVE-2026-98178

A flaw was found in the Linux kernel's AMD GPU driver. When compute subsystem initialization fails, uninitialized device structures remain attached to the graphics driver. A local user capable of triggering a GPU reset can cause the system to dereference an unallocated memory pointer, resulting i...

CVE-2026-98177

A flaw was found in the Linux kernel's AMD GPU driver amdkfd. A local user could trigger a Denial of Service DoS or system instability due to an integer underflow vulnerability during the calculation of the End of Pipe EOP ring buffer size. Under specific conditions, this improper calculation cou...