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CVE-2023-52597

Status Candidate

Overview

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: fix setting of fpc register kvm_arch_vcpu_ioctl_set_fpu() allows to set the floating point control (fpc) register of a guest cpu. The new value is tested for validity by temporarily loading it into the fpc register. This may lead to corruption of the fpc register of the host process: if an interrupt happens while the value is temporarily loaded into the fpc register, and within interrupt context floating point or vector registers are used, the current fp/vx registers are saved with save_fpu_regs() assuming they belong to user space and will be loaded into fp/vx registers when returning to user space. test_fp_ctl() restores the original user space / host process fpc register value, however it will be discarded, when returning to user space. In result the host process will incorrectly continue to run with the value that was supposed to be used for a guest cpu. Fix this by simply removing the test. There is another test right before the SIE context is entered which will handles invalid values. This results in a change of behaviour: invalid values will now be accepted instead of that the ioctl fails with -EINVAL. This seems to be acceptable, given that this interface is most likely not used anymore, and this is in addition the same behaviour implemented with the memory mapped interface (replace invalid values with zero) - see sync_regs() in kvm-s390.c.

Related Files

Ubuntu Security Notice USN-6795-1
Posted May 29, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6795-1 - Zheng Wang discovered that the Broadcom FullMAC WLAN driver in the Linux kernel contained a race condition during device removal, leading to a use- after-free vulnerability. A physically proximate attacker could possibly use this to cause a denial of service. It was discovered that the Open vSwitch implementation in the Linux kernel could overflow its stack during recursive action operations under certain conditions. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-0001, CVE-2023-47233, CVE-2023-52435, CVE-2023-52491, CVE-2023-52492, CVE-2023-52494, CVE-2023-52498, CVE-2023-52530, CVE-2023-52583, CVE-2023-52587, CVE-2023-52588, CVE-2023-52595, CVE-2023-52597, CVE-2023-52598
SHA-256 | 1263e2b9ac7045e640a955619fc9ec7e9ee0cee6811cce5ca858a631117df48d
Ubuntu Security Notice USN-6766-3
Posted May 20, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6766-3 - It was discovered that the Open vSwitch implementation in the Linux kernel could overflow its stack during recursive action operations under certain conditions. A local attacker could use this to cause a denial of service. Sander Wiebing, Alvise de Faveri Tron, Herbert Bos, and Cristiano Giuffrida discovered that the Linux kernel mitigations for the initial Branch History Injection vulnerability were insufficient for Intel processors. A local attacker could potentially use this to expose sensitive information.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-0001, CVE-2023-52435, CVE-2023-52492, CVE-2023-52493, CVE-2023-52583, CVE-2023-52587, CVE-2023-52595, CVE-2023-52597, CVE-2023-52601, CVE-2023-52606, CVE-2023-52607, CVE-2023-52615, CVE-2023-52616, CVE-2023-52617
SHA-256 | 8016064a83bb8f7ec9c086ffc5f49d34292dc87c98d4d5e89a0f4a68cc0615bc
Ubuntu Security Notice USN-6766-2
Posted May 16, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6766-2 - It was discovered that the Open vSwitch implementation in the Linux kernel could overflow its stack during recursive action operations under certain conditions. A local attacker could use this to cause a denial of service. Sander Wiebing, Alvise de Faveri Tron, Herbert Bos, and Cristiano Giuffrida discovered that the Linux kernel mitigations for the initial Branch History Injection vulnerability were insufficient for Intel processors. A local attacker could potentially use this to expose sensitive information.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-0001, CVE-2023-52435, CVE-2023-52492, CVE-2023-52493, CVE-2023-52583, CVE-2023-52587, CVE-2023-52595, CVE-2023-52597, CVE-2023-52601, CVE-2023-52606, CVE-2023-52607, CVE-2023-52615, CVE-2023-52616, CVE-2023-52617
SHA-256 | 0a8b72cb9ddc467a12013b3d726c7b1fa23dd695db2b2331e5af1ee0356bc9c9
Ubuntu Security Notice USN-6767-2
Posted May 14, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6767-2 - Chenyuan Yang discovered that the RDS Protocol implementation in the Linux kernel contained an out-of-bounds read vulnerability. An attacker could use this to possibly cause a denial of service. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, denial of service, kernel, protocol
systems | linux, ubuntu
advisories | CVE-2023-52435, CVE-2023-52587, CVE-2023-52594, CVE-2023-52595, CVE-2023-52597, CVE-2023-52598, CVE-2023-52599, CVE-2023-52601, CVE-2023-52606, CVE-2023-52607, CVE-2023-52617, CVE-2023-52619, CVE-2024-23849, CVE-2024-26593
SHA-256 | 885350375e9760db30c910ea3c9badf280ffc608433042df8187d13fec7c9681
Ubuntu Security Notice USN-6766-1
Posted May 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6766-1 - It was discovered that the Open vSwitch implementation in the Linux kernel could overflow its stack during recursive action operations under certain conditions. A local attacker could use this to cause a denial of service. Sander Wiebing, Alvise de Faveri Tron, Herbert Bos, and Cristiano Giuffrida discovered that the Linux kernel mitigations for the initial Branch History Injection vulnerability were insufficient for Intel processors. A local attacker could potentially use this to expose sensitive information.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-0001, CVE-2023-52435, CVE-2023-52492, CVE-2023-52493, CVE-2023-52583, CVE-2023-52587, CVE-2023-52595, CVE-2023-52597, CVE-2023-52601, CVE-2023-52606, CVE-2023-52607, CVE-2023-52615, CVE-2023-52616, CVE-2023-52617
SHA-256 | 7b9d401aae999b54dc79d9c6b860920ebcf6a9add3896d3e2fa03e35ea39ca96
Ubuntu Security Notice USN-6767-1
Posted May 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6767-1 - Chenyuan Yang discovered that the RDS Protocol implementation in the Linux kernel contained an out-of-bounds read vulnerability. An attacker could use this to possibly cause a denial of service. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, denial of service, kernel, protocol
systems | linux, ubuntu
advisories | CVE-2023-52435, CVE-2023-52587, CVE-2023-52594, CVE-2023-52595, CVE-2023-52597, CVE-2023-52598, CVE-2023-52599, CVE-2023-52601, CVE-2023-52606, CVE-2023-52607, CVE-2023-52617, CVE-2023-52619, CVE-2024-23849, CVE-2024-26593
SHA-256 | 339076a1f5711d55cd375ea187457dc3949b36b7d8631b134fc24a9b65866d7e
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