Vulnerability Details : CVE-2022-26356
Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.
Products affected by CVE-2022-26356
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-26356
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 12 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-26356
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:L/AC:H/Au:N/C:N/I:N/A:C |
1.9
|
6.9
|
NIST | |
|
5.6
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H |
1.1
|
4.0
|
NIST |
CWE ids for CVE-2022-26356
-
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.Assigned by: nvd@nist.gov (Primary)
-
The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-26356
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/
[SECURITY] Fedora 34 Update: xen-4.14.5-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
http://xenbits.xen.org/xsa/advisory-397.html
XSA-397 - Xen Security AdvisoriesPatch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/
[SECURITY] Fedora 34 Update: xen-4.14.5-1.fc34 - package-announce - Fedora Mailing-Lists
-
http://www.openwall.com/lists/oss-security/2022/04/05/1
oss-security - Xen Security Advisory 397 v2 (CVE-2022-26356) - Racy interactions between dirty vram tracking and paging log dirty hypercallsMailing List;Patch;Third Party Advisory
-
https://xenbits.xenproject.org/xsa/advisory-397.txt
Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/
[SECURITY] Fedora 35 Update: xen-4.15.2-3.fc35 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/202402-07
Xen: Multiple Vulnerabilities (GLSA 202402-07) — Gentoo security
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/
[SECURITY] Fedora 35 Update: xen-4.15.2-3.fc35 - package-announce - Fedora Mailing-Lists
-
https://www.debian.org/security/2022/dsa-5117
Debian -- Security Information -- DSA-5117-1 xenThird Party Advisory
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