Bug 2072698 (CVE-2022-1263) - CVE-2022-1263 kernel: KVM: NULL pointer dereference in kvm_dirty_ring_push in virt/kvm/dirty_ring.c
Summary: CVE-2022-1263 kernel: KVM: NULL pointer dereference in kvm_dirty_ring_push in...
Keywords:
Status: NEW
Alias: CVE-2022-1263
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2061574 2074832 2074835 2096875 2096876 2096877 2096878 2096881
Blocks: 2072700 2073418
TreeView+ depends on / blocked
 
Reported: 2022-04-06 19:18 UTC by Pedro Sampaio
Modified: 2023-09-19 14:13 UTC (History)
43 users (show)

Fixed In Version: kernel 5.18
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service.
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Description Pedro Sampaio 2022-04-06 19:18:08 UTC 
A null pointer dereference was found in the kvm module which can lead to denial of service. This flaw is in kvm_dirty_ring_push in virt/kvm/dirty_ring.c.

References:

https://www.openwall.com/lists/oss-security/2022/04/07/1
Comment 2 Mauro Matteo Cascella 2022-06-14 10:18:23 UTC 
Upstream commit:
https://github.com/torvalds/linux/commit/5593473a1e6c743764b08e3b6071cb43b5cfa6c4
Comment 6 Mauro Matteo Cascella 2022-06-14 13:14:54 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2096875]
Comment 8 Justin M. Forbes 2022-06-14 14:33:12 UTC 
This was fixed for Fedora with the 5.16.20 stable kernel updates.
Comment 16 Mauro Matteo Cascella 2023-05-04 13:47:22 UTC 
This issue was fixed upstream in version 5.19. The kernel packages as shipped in the following Red Hat products were previously updated to a version that contains the fix via the following errata:

kernel in Red Hat Enterprise Linux 8
https://access.redhat.com/errata/RHSA-2022:7683

kernel-rt in Red Hat Enterprise Linux 8
https://access.redhat.com/errata/RHSA-2022:7444

kernel in Red Hat Enterprise Linux 9
https://access.redhat.com/errata/RHSA-2022:8267

kernel-rt in Red Hat Enterprise Linux 9
https://access.redhat.com/errata/RHSA-2022:7933
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