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Vulnerability · Published Mar 22, 2021 · Assigned by mitre

CVE-2021-28964

Medium 4.7

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 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)4.7Medium
Exploit odds (30 days)0.3%top 81.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer before a cloning operation, aka CID-dbcc7d57bffc.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.10.26-1DEBIAN-CVE-2021-28964
Debian:13linux5.10.26-1DEBIAN-CVE-2021-28964
Debian:14linux5.10.26-1DEBIAN-CVE-2021-28964
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-28964
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-28964
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-28964

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References