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CVE-2024-53241

x86/xen: don't do PV iret hypercall through hypercall page

EPSS 0.3%
In the Linux kernel, the following vulnerability has been resolved: x86/xen: don't do PV iret hypercall through hypercall page Instead of jumping to the Xen hypercall page for doing the iret hypercall, directly code the required sequence in xen-asm.S. This is done in preparation of no longer using hypercall page at all, as it has shown to cause problems with speculation mitigations. This is part of XSA-466 / CVE-2024-53241.
Affected products
Linux · Linux

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References
https://git.kernel.org/stable/c/05df6e6cd9a76b778aee33c3c18c9f3b3566d4a5https://git.kernel.org/stable/c/82c211ead1ec440dbf81727e17b03b5e3c44b93dhttps://git.kernel.org/stable/c/a2796dff62d6c6bfc5fbebdf2bee0d5ac0438906https://git.kernel.org/stable/c/c7b4cfa6213a44fa48714186dfdf125072d036e3https://git.kernel.org/stable/c/f7c3fdad0a474062d566aae3289d490d7e702d30https://git.kernel.org/stable/c/fa719857f613fed94a79da055b13ca51214c694fhttps://lists.debian.org/debian-lts-announce/2025/03/msg00001.htmlhttps://lists.debian.org/debian-lts-announce/2025/03/msg00002.htmlhttp://www.openwall.com/lists/oss-security/2024/12/17/2http://www.openwall.com/lists/oss-security/2024/12/23/1http://www.openwall.com/lists/oss-security/2025/01/05/1http://www.openwall.com/lists/oss-security/2025/01/05/2