01 Record

CVE-2021-47189

btrfs: fix memory ordering between normal and ordered work functions

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

btrfs: fix memory ordering between normal and ordered work functions

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.66% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 49.2% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-04.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2024-04-10 18:56Z2 YR AGO

Last updated

2026-08-05 08:46Z1 MO AGO

Reserved

2024-03-25

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-821Incorrect SynchronizationBase

Data version

5.2

Document digest

4dd63471014053533e64f76798a908c306b74b310da2648e5ee3fa8edbf22ba4

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux08a9ff3264181986d1d692a4e6fce3669700c9f8 to < bd660a20fea3ec60a49709ef5360f145ec0fe779, 08a9ff3264181986d1d692a4e6fce3669700c9f8 to < 637d652d351fd4f263ef302dc52f3971d314e500, 08a9ff3264181986d1d692a4e6fce3669700c9f8 to < 804a9d239ae9cbe88e861a7cd62319cc6ec7b136, 08a9ff3264181986d1d692a4e6fce3669700c9f8 to < ed058d735a70f4b063323f1a7bb33cda0f987513, 08a9ff3264181986d1d692a4e6fce3669700c9f8 to < 670f6b3867c8f0f11e5097f353b164cecfec6179, 08a9ff3264181986d1d692a4e6fce3669700c9f8 to < 6adbc07ebcaf8bead08b21687d49e0fc94400987, 08a9ff3264181986d1d692a4e6fce3669700c9f8 to < 47e6f9f69153247109042010f3a77579e9dc61ff, 08a9ff3264181986d1d692a4e6fce3669700c9f8 to < 45da9c1767ac31857df572f0a909fbe88fd5a7e9, 3.15—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/bd660a20fea3ec60a49709ef5360f145ec0fe779
git.kernel.orghttps://git.kernel.org/stable/c/637d652d351fd4f263ef302dc52f3971d314e500
git.kernel.orghttps://git.kernel.org/stable/c/804a9d239ae9cbe88e861a7cd62319cc6ec7b136
git.kernel.orghttps://git.kernel.org/stable/c/ed058d735a70f4b063323f1a7bb33cda0f987513
git.kernel.orghttps://git.kernel.org/stable/c/670f6b3867c8f0f11e5097f353b164cecfec6179
git.kernel.orghttps://git.kernel.org/stable/c/6adbc07ebcaf8bead08b21687d49e0fc94400987
git.kernel.orghttps://git.kernel.org/stable/c/47e6f9f69153247109042010f3a77579e9dc61ff
git.kernel.orghttps://git.kernel.org/stable/c/45da9c1767ac31857df572f0a909fbe88fd5a7e9

01 Record index

CVE-2021-47189

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47189

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References