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CVE-2026-46171

riscv: kvm: fix vector context allocation leak

MEDIUM
5.5
CVSS Score
Published: May 28, 2026 at 09:36 AM UTC
Updated: October 21, 2026 at 01:19 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: riscv: kvm: fix vector context allocation leak When the second kzalloc (host_context.vector.datap) fails in kvm_riscv_vcpu_alloc_vector_context, the first allocation (guest_context.vector.datap) is leaked. Free it before returning.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.19 ≤ v < 7.0.76.5 ≤ v < 6.18.300f4b82579716b12bb88257bd7ea80f25c791fb2c6.5
Vendor states this is fixed in 1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98 (fixed)
Vendor states this is fixed in b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978 (fixed)
Vendor states this is fixed in bd62c0f61bc722a097417401030c596cea8e21aa (fixed)
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.18.30 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)
Vendor states this is fixed in 7.0.7 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

References (5)

Patch
Source: cverecord
https://git.kernel.org/stable/c/bd62c0f61bc722a097417401030c596cea8e21aa
Patch
Source: cverecord
https://git.kernel.org/stable/c/1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98
Patch
Source: cverecord
https://git.kernel.org/stable/c/b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978
Source: cverecord
https://git.kernel.org/stable/c/8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049
Source: cverecord
https://git.kernel.org/stable/c/70ecebe7c58ce01f8da3f513eafb51bd147b1e63

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-401

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