Vulnerability Details : CVE-2022-33740
Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).
Vulnerability category: Information leak
Products affected by CVE-2022-33740
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.12:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-33740
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-33740
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.6
|
LOW | AV:L/AC:L/Au:N/C:P/I:N/A:P |
3.9
|
4.9
|
NIST | |
|
7.1
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
1.8
|
5.2
|
NIST |
CWE ids for CVE-2022-33740
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-33740
-
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
[SECURITY] [DLA 3131-1] linux security updateMailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2022/07/05/6
oss-security - Xen Security Advisory 403 v3 (CVE-2022-26365,CVE-2022-33740,CVE-2022-33741,CVE-2022-33742) - Linux disk/nic frontends data leaksMailing List;Patch;Third Party Advisory
-
https://www.debian.org/security/2022/dsa-5191
Debian -- Security Information -- DSA-5191-1 linuxThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/
[SECURITY] Fedora 36 Update: xen-4.16.1-5.fc36 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://xenbits.xenproject.org/xsa/advisory-403.txt
Vendor Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
[SECURITY] Fedora 35 Update: xen-4.15.3-2.fc35 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
http://xenbits.xen.org/xsa/advisory-403.html
XSA-403 - Xen Security AdvisoriesPatch;Vendor Advisory
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