PT-2021-2510 · Linux+5 · Linux Kernel+5

Zygo Blaxell · Published 2021-03-16 · Updated 2023-05-17 · CVE-2021-28964

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions through 5.11.8

Description A race condition was discovered in get old root in fs/btrfs/ctree.c. It allows attackers to cause a denial of service because of a lack of locking on an extent buffer before a cloning operation. This issue is related to errors in synchronization when using a shared resource.

Recommendations For Linux kernel versions through 5.11.8, update to a version that includes a fix for this issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

ALT-PU-2021-1566

ALT-PU-2021-1609

ALT-PU-2021-1869

ALT-PU-2021-1888

ALT-PU-2021-1896

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

AZL-6541

BDU:2021-01887

CVE-2021-28964

DLA-2689-1

DLA-2690-1

MGASA-2021-0174

MGASA-2021-0175

OESA-2021-1176

OPENSUSE-SU-2021:0532-1

OPENSUSE-SU-2021:0758-1

OPENSUSE-SU-2021:1975-1

OPENSUSE-SU-2021:1977-1

OPENSUSE-SU-2021_0532-1

OPENSUSE-SU-2021_0758-1

OPENSUSE-SU-2021_1975-1

OPENSUSE-SU-2021_1977-1

SUSE-SU-2021:1175-1

SUSE-SU-2021:1176-1

SUSE-SU-2021:1177-1

SUSE-SU-2021:1210-1

SUSE-SU-2021:1211-1

SUSE-SU-2021:1238-1

SUSE-SU-2021:1573-1

SUSE-SU-2021:1596-1

SUSE-SU-2021:1624-1

SUSE-SU-2021:1625-1

SUSE-SU-2021:1975-1

SUSE-SU-2021:1977-1

USN-4948-1

USN-4979-1

USN-4982-1

USN-4984-1

USN-5361-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 595

• https://osv.dev/vulnerability/openSUSE-SU-2021:0758-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2690-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31916 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-29657 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5361-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-36311 · Security Note
• https://ubuntu.com/security/CVE-2021-43976 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-23133 · Security Note
• https://ubuntu.com/security/CVE-2021-3489 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4982-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-28660 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-28688 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-3506 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-30002 · Security Note