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CVE-2023-4155

Status Candidate

Overview

A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).

Related Files

Red Hat Security Advisory 2024-3859-03
Posted Jun 12, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-3859-03 - An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2023-4155
SHA-256 | ad4dd7324a21f8ada00f4f0cbfbe64df788bb019bc980d68e69b09bf024797c6
Ubuntu Security Notice USN-6445-2
Posted Oct 24, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6445-2 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3338, CVE-2023-34319, CVE-2023-38432, CVE-2023-3863, CVE-2023-3865, CVE-2023-3866, CVE-2023-4132, CVE-2023-4155, CVE-2023-4194, CVE-2023-4244, CVE-2023-4273
SHA-256 | 7161886f27ce432ad514954dd1b3c798e3d98a8a29d07d4592bcf71aae1d37df
Ubuntu Security Notice USN-6445-1
Posted Oct 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6445-1 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3338, CVE-2023-34319, CVE-2023-38432, CVE-2023-3863, CVE-2023-3865, CVE-2023-3866, CVE-2023-4132, CVE-2023-4155, CVE-2023-4194, CVE-2023-4244, CVE-2023-4273
SHA-256 | e6b24dd74615cc6c00bd4c9686d9c6103de24a03be2c7b72a6caee0cd088dc72
Ubuntu Security Notice USN-6416-3
Posted Oct 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6416-3 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3338, CVE-2023-38432, CVE-2023-3863, CVE-2023-3865, CVE-2023-3866, CVE-2023-4132, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273, CVE-2023-44466
SHA-256 | 7a887816f9107b60df8541b3552c4aaff017ce7bcb38a20efdd9a941ee1a370e
Ubuntu Security Notice USN-6416-2
Posted Oct 6, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6416-2 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Daniƫl Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3338, CVE-2023-38432, CVE-2023-3863, CVE-2023-3865, CVE-2023-3866, CVE-2023-4132, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273, CVE-2023-44466
SHA-256 | b063e3f6be8c77181b424a0cfdc4405df776762ca5688f781a192b755ad403a0
Ubuntu Security Notice USN-6416-1
Posted Oct 5, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6416-1 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3338, CVE-2023-38432, CVE-2023-3863, CVE-2023-3865, CVE-2023-3866, CVE-2023-4132, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273, CVE-2023-44466
SHA-256 | 331f2ead28b7e52720b6f311fc3698392b6dd99793aaafc88fa16cf568162c17
Ubuntu Security Notice USN-6412-1
Posted Oct 5, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6412-1 - Hyunwoo Kim discovered that the DVB Core driver in the Linux kernel contained a race condition during device removal, leading to a use-after- free vulnerability. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code. Hyunwoo Kim discovered that the Technotrend/Hauppauge USB DEC driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2022-45886, CVE-2022-45887, CVE-2022-48425, CVE-2023-1206, CVE-2023-20569, CVE-2023-2156, CVE-2023-3212, CVE-2023-38427, CVE-2023-38431, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273
SHA-256 | eef2bb4192be147f56bfdab3849d216add0a381c00e18c6ca3934a0f72c58c02
Ubuntu Security Notice USN-6343-1
Posted Sep 6, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6343-1 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Ross Lagerwall discovered that the Xen netback backend driver in the Linux kernel did not properly handle certain unusual packets from a paravirtualized network frontend, leading to a buffer overflow. An attacker in a guest VM could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, remote, denial of service, overflow, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2023-1206, CVE-2023-34319, CVE-2023-40283, CVE-2023-4128, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273
SHA-256 | 7110047976f0ec67dc61de4540495873aa7a04b2a42b9e6129b9fe9d882af93f
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