What’s Vulnerable › Vulnerabilities
CVE-2024-53241: x86/xen: don't do PV iret hypercall through hypercall page
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-12-24 · updated 2026-06-17
Description
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 kernel: before 5.10.232; from 5.11 before 5.15.175; from 5.16 before 6.1.121; from 6.2 before 6.6.67; from 6.7 before 6.12.6; 6.13-rc1, 6.13-rc2, 6.13-rc3 — fixed in 5.10.232, 5.15.175, 6.1.121, 6.12.6, 6.6.67
How to fix
Upgrade to a fixed version: Linux kernel 5.10.232, 5.15.175, 6.1.121, 6.12.6. Check the vendor advisory for mitigations.
References
- https://git.kernel.org/stable/c/05df6e6cd9a76b778aee33c3c18c9f3b3566d4a5
- https://git.kernel.org/stable/c/82c211ead1ec440dbf81727e17b03b5e3c44b93d
- https://git.kernel.org/stable/c/a2796dff62d6c6bfc5fbebdf2bee0d5ac0438906
- https://git.kernel.org/stable/c/c7b4cfa6213a44fa48714186dfdf125072d036e3
- https://git.kernel.org/stable/c/f7c3fdad0a474062d566aae3289d490d7e702d30
- https://git.kernel.org/stable/c/fa719857f613fed94a79da055b13ca51214c694f
- http://www.openwall.com/lists/oss-security/2024/12/17/2
- http://www.openwall.com/lists/oss-security/2024/12/23/1
- http://www.openwall.com/lists/oss-security/2025/01/05/1
- http://www.openwall.com/lists/oss-security/2025/01/05/2
- http://xenbits.xen.org/xsa/advisory-466.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
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