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CVE-2022-33740

HIGH
7.1
CVSS Score
Published: July 5, 2022 at 12:50 PM UTC
Updated: June 17, 2026 at 04:49 AM UTC
4 products affected across 4 vendorsLinux KernelDebian LinuxFedora

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Severity
HIGH7.1
Exploit prediction
EPSS 0.3%

Description

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).

Affected

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

Debian Linux· Debiandrupal
95%
10.011.0
Fedora· Fedora Projectrpm
95%
3536
Linux Kernel· Linux
95%
2.6.13 ≤ v < 4.9.3224.14 ≤ v < 4.14.2874.19 ≤ v < 4.19.2515.10 ≤ v < 5.10.1295.15 ≤ v < 5.15.535.18 ≤ v < 5.18.105.4 ≤ v < 5.4.2042.6.12 rc22.6.12 rc32.6.12 rc42.6.12 rc52.6.12 rc65.19 rc15.19 rc25.19 rc35.19 rc45.19 rc5
Affected range stops below 4.14.287, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.251, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.322, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.10.129, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.53, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.18.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.204, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in consult Xen advisory XSA-403 (unknown)
Xen· Xenwordpress-plugin
95%
All versions
Vendor states this is fixed in consult Xen advisory XSA-403 (unknown)

References (7)

Mailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2022/07/05/6
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
http://xenbits.xen.org/xsa/advisory-403.html
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2022/dsa-5191
x_refsource_MISCVendor Advisory
Source: [email protected]
https://xenbits.xenproject.org/xsa/advisory-403.txt

CVSS

7.1HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-212

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