Vulnerability · Published Mar 18, 2022 · Assigned by mitre
CVE-2021-45868
Medium 5.5
In plain English
A medium-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)1.3%top 28.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.15.3-1 | DEBIAN-CVE-2021-45868 |
| Debian:13 | linux | 5.15.3-1 | DEBIAN-CVE-2021-45868 |
| Debian:14 | linux | 5.15.3-1 | DEBIAN-CVE-2021-45868 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-45868 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-45868 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-45868 |
Affected products (as reported)
References
- https://bugzilla.kernel.org/show_bug.cgi?id=214655 x_refsource_MISC
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9bf3d20331295b1ecb81f4ed9ef358c51699a050 x_refsource_MISC
- https://www.openwall.com/lists/oss-security/2022/03/17/2 x_refsource_MISC
- https://www.openwall.com/lists/oss-security/2022/03/17/1 x_refsource_MISC
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.3 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220419-0003/ x_refsource_CONFIRM