CVE-2024-46707: KVM: arm64: Make ICC_*SGI*_EL1 undef in the absence of a vGICv3
First published: Fri Sep 13 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Make ICC_*SGI*_EL1 undef in the absence of a vGICv3 On a system with a GICv3, if a guest hasn't been configured with GICv3 and that the host is not capable of GICv2 emulation, a write to any of the ICC_*SGI*_EL1 registers is trapped to EL2. We therefore try to emulate the SGI access, only to hit a NULL pointer as no private interrupt is allocated (no GIC, remember?). The obvious fix is to give the guest what it deserves, in the shape of a UNDEF exception.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.10.225 | |
| Linux Linux kernel | >=5.11<5.15.166 | |
| Linux Linux kernel | >=5.16<6.1.107 | |
| Linux Linux kernel | >=6.2<6.6.48 | |
| Linux Linux kernel | >=6.7<6.10.7 | |
| Linux Linux kernel | =6.11-rc1 | |
| Linux Linux kernel | =6.11-rc2 | |
| Linux Linux kernel | =6.11-rc3 | |
| Linux Linux kernel | =6.11-rc4 | |
| debian/linux | <=5.10.223-1 | 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/15818af2f7aa55eff375333cb7689df15d3f24ef
- https://git.kernel.org/stable/c/2073132f6ed3079369e857a8deb33d11bdd983bc
- https://git.kernel.org/stable/c/3e6245ebe7ef341639e9a7e402b3ade8ad45a19f
- https://git.kernel.org/stable/c/94d4fbad01b19ec5eab3d6b50aaec4f9db8b2d8d
- https://git.kernel.org/stable/c/96b076e8ee5bc3a1126848c8add0f74bd30dc9d1
- https://git.kernel.org/stable/c/9d7629bec5c3f80bd0e3bf8103c06a2f7046bd92
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-46707
- https://nvd.nist.gov/vuln/detail/CVE-2024-46707
- https://launchpad.net/bugs/cve/CVE-2024-46707
- https://security-tracker.debian.org/tracker/CVE-2024-46707
- https://ubuntu.com/security/CVE-2024-46707
- https://git.kernel.org/linus/3e6245ebe7ef341639e9a7e402b3ade8ad45a19f
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