发布于3月6日3月6日 Members Ubuntu: (CVE-2023-52740): linux vulnerability Severity 4 CVSS (AV:L/AC:M/Au:N/C:P/I:P/A:P) Published 05/21/2024 Created 11/21/2024 Added 11/19/2024 Modified 02/11/2025 Description In the Linux kernel, the following vulnerability has been resolved: powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch The RFI and STF security mitigation options can flip the interrupt_exit_not_reentrant static branch condition concurrently with the interrupt exit code which tests that branch. Interrupt exit tests this condition to set MSR[EE|RI] for exit, then again in the case a soft-masked interrupt is found pending, to recover the MSR so the interrupt can be replayed before attempting to exit again. If the condition changes between these two tests, the MSR and irq soft-mask state will become corrupted, leading to warnings and possible crashes. For example, if the branch is initially true then false, MSR[EE] will be 0 but PACA_IRQ_HARD_DIS clear and EE may not get enabled, leading to warnings in irq_64.c. Solution(s) ubuntu-upgrade-linux ubuntu-upgrade-linux-aws ubuntu-upgrade-linux-aws-5-15 ubuntu-upgrade-linux-azure ubuntu-upgrade-linux-azure-5-15 ubuntu-upgrade-linux-azure-fde ubuntu-upgrade-linux-azure-fde-5-15 ubuntu-upgrade-linux-bluefield ubuntu-upgrade-linux-gcp ubuntu-upgrade-linux-gcp-5-15 ubuntu-upgrade-linux-gke ubuntu-upgrade-linux-gkeop ubuntu-upgrade-linux-gkeop-5-15 ubuntu-upgrade-linux-hwe-5-15 ubuntu-upgrade-linux-ibm ubuntu-upgrade-linux-intel-iot-realtime ubuntu-upgrade-linux-intel-iotg ubuntu-upgrade-linux-intel-iotg-5-15 ubuntu-upgrade-linux-kvm ubuntu-upgrade-linux-lowlatency ubuntu-upgrade-linux-lowlatency-hwe-5-15 ubuntu-upgrade-linux-nvidia ubuntu-upgrade-linux-oracle ubuntu-upgrade-linux-oracle-5-15 ubuntu-upgrade-linux-raspi ubuntu-upgrade-linux-realtime ubuntu-upgrade-linux-riscv-5-15 References https://attackerkb.com/topics/cve-2023-52740 CVE - 2023-52740 https://git.kernel.org/linus/2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1 https://git.kernel.org/stable/c/2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1 https://git.kernel.org/stable/c/6f097c24815e67909a1fcc2c605586d02babd673 https://git.kernel.org/stable/c/86f7e423933608d536015a0f2eb9e0338c1227e0 https://www.cve.org/CVERecord?id=CVE-2023-52740
