CVE-2024-55881

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-55881
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-55881.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-55881
Downstream
Related
Published
2025-01-11T13:15:28Z
Modified
2025-07-29T11:18:19.179516Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

KVM: x86: Play nice with protected guests in completehypercallexit()

Use is64bithypercall() instead of is64bitmode() to detect a 64-bit hypercall when completing said hypercall. For guests with protected state, e.g. SEV-ES and SEV-SNP, KVM must assume the hypercall was made in 64-bit mode as the vCPU state needed to detect 64-bit mode is unavailable.

Hacking the sevsmoketest selftest to generate a KVMHCMAPGPARANGE hypercall via VMGEXIT trips the WARN:

------------[ cut here ]------------ WARNING: CPU: 273 PID: 326626 at arch/x86/kvm/x86.h:180 completehypercallexit+0x44/0xe0 [kvm] Modules linked in: kvmamd kvm ... [last unloaded: kvm] CPU: 273 UID: 0 PID: 326626 Comm: sevsmoketest Not tainted 6.12.0-smp--392e932fa0f3-feat #470 Hardware name: Google Astoria/astoria, BIOS 0.20240617.0-0 06/17/2024 RIP: 0010:completehypercallexit+0x44/0xe0 [kvm] Call Trace: <TASK> kvmarchvcpuioctlrun+0x2400/0x2720 [kvm] kvmvcpuioctl+0x54f/0x630 [kvm] _sesysioctl+0x6b/0xc0 dosyscall64+0x83/0x160 entrySYSCALL64afterhwframe+0x76/0x7e </TASK> ---[ end trace 0000000000000000 ]---

References

Affected packages

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.123-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.1.112-1
6.1.115-1
6.1.119-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.12.8-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:11 / linux-6.1

Package

Name
linux-6.1
Purl
pkg:deb/debian/linux-6.1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.128-1~deb11u1

Affected versions

6.*

6.1.106-3~deb11u1
6.1.106-3~deb11u2
6.1.106-3~deb11u3
6.1.112-1~deb11u1
6.1.119-1~deb11u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}