Home/CVE/In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk).
CVE

CVE-2021-45868

In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk).

In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk). This can, for example, lead to a kernel/locking/rwsem.c use-after-free if there is a corrupted quota file.

MEDIUM · CVSS 5.5 EPSS 0.00218
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

9
linux kernel< 5.15.3
netapp h300s firmwareall versions
netapp h700s firmwareall versions
netapp h300e firmwareall versions
netapp h500e firmwareall versions
netapp h700e firmwareall versions
netapp h410s firmwareall versions
netapp h410c firmwareall versions
⚠

Public Exploits & PoCs

1
pocbugzilla.kernel.org · show_bug.cgi?id=214655bugzilla.kernel.org
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · cve@mitre.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 NVD18 Mar 2022 · 07:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

18
usnUSN-6014-1
usnUSN-6013-1
usnUSN-6001-1
suse-csafSUSE-SU-2023:0416-1
suse-csafSUSE-SU-2022:1402-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.3Mailing ListRelease NotesVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9bf3d20331295b1ecb81f4ed9ef358c51699a050Mailing ListPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20220419-0003/Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/17/1ExploitMailing ListPatchThird Party Advisory
https://www.openwall.com/lists/oss-security/2022/03/17/2ExploitMailing ListPatchThird Party Advisory
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