01 Record

CVE-2021-47637

ubifs: Fix deadlock in concurrent rename whiteout and inode writeback

MediumPUBLISHEDCNA: Linux

CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

ubifs: Fix deadlock in concurrent rename whiteout and inode writeback

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

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 8.8% of scored records. A rank, not a probability.

NVD base score

5.5 (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:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. 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

2025-02-26 01:54Z1 YR AGO

Last updated

2026-05-11 13:58Z3 MO AGO

Reserved

2025-02-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

CWE-667Improper LockingClass

Data version

5.2

Document digest

e3326943c3c1cf85f4a584d4c4b002831f4a3f77384d05ed6465ab677ce07ccf

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux9e0a1fff8db56eaaebb74b4a3ef65f86811c4798 to < 9dddc8211430fb851ddf0b168e3a00c6f66cc185, 9e0a1fff8db56eaaebb74b4a3ef65f86811c4798 to < 37bdf1ad592555ecda1d55b89f6e393e4c0589d1, 9e0a1fff8db56eaaebb74b4a3ef65f86811c4798 to < 83e42a78428fc354f5e2049935b84c8d8d29b787, 9e0a1fff8db56eaaebb74b4a3ef65f86811c4798 to < c58af8564a7b08757173009030b74baf4b2b762b, 9e0a1fff8db56eaaebb74b4a3ef65f86811c4798 to < 70e9090acc32348cedc5def0cd6d5c126efc97b9, 9e0a1fff8db56eaaebb74b4a3ef65f86811c4798 to < 8b278c8dcfb565cb65eceb62a38cbf7a7c326db5, 9e0a1fff8db56eaaebb74b4a3ef65f86811c4798 to < afd427048047e8efdedab30e8888044e2be5aa9c, 4.9—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/9dddc8211430fb851ddf0b168e3a00c6f66cc185
git.kernel.orghttps://git.kernel.org/stable/c/37bdf1ad592555ecda1d55b89f6e393e4c0589d1
git.kernel.orghttps://git.kernel.org/stable/c/83e42a78428fc354f5e2049935b84c8d8d29b787
git.kernel.orghttps://git.kernel.org/stable/c/c58af8564a7b08757173009030b74baf4b2b762b
git.kernel.orghttps://git.kernel.org/stable/c/70e9090acc32348cedc5def0cd6d5c126efc97b9
git.kernel.orghttps://git.kernel.org/stable/c/8b278c8dcfb565cb65eceb62a38cbf7a7c326db5
git.kernel.orghttps://git.kernel.org/stable/c/afd427048047e8efdedab30e8888044e2be5aa9c

01 Record index

CVE-2021-47637

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47637

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References