Home/CVE/Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspec
CVE

CVE-2022-26365

Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspec

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).

HIGH · CVSS 7.1 EPSS 0.00043
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-401Missing Release of Memory after Effective Lifetime
▤

Affected Products & Versions

11
linux kernel>= 2.6.13 and < 4.9.322
linux kernel>= 4.14 and < 4.14.287
linux kernel>= 4.19 and < 4.19.251
linux kernel>= 5.4 and < 5.4.204
linux kernel>= 5.10 and < 5.10.129
linux kernel>= 5.15 and < 5.15.53
linux kernel>= 5.18 and < 5.18.10
linux kernelall versions
▣

Scoring & Timeline

7.1
HIGH · CVSS v3.1 · security@xen.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Jul 2022 · 01:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
⚑

Vendor Advisories

30
usnUSN-5789-1
usnUSN-5773-1
suse-csafSUSE-SU-2022:3928-1
usnUSN-5706-1
suse-csafSUSE-SU-2022:3728-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2022/07/05/6Mailing ListPatchThird Party Advisory
http://xenbits.xen.org/xsa/advisory-403.htmlPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
https://www.debian.org/security/2022/dsa-5191Third Party Advisory
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