01 Record

CVE-2023-53421

blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()

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

blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()

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

0.16% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 5.8% 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

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

2025-09-18 16:04Z11 MO AGO

Last updated

2026-06-01 16:04Z3 MO AGO

Reserved

2025-09-17

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-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

8a51f51c93efb94a0430b163d8f811a37481bb32a3c89092575614822cbb67bd

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxf73316482977ac401ac37245c9df48079d4e11f3 to < 58c135513562698f222a58ba07dbdfcfb268aa0d, f73316482977ac401ac37245c9df48079d4e11f3 to < 0561aa6033dd181594116d705c41fc16e97161a2, f73316482977ac401ac37245c9df48079d4e11f3 to < 892faa76be894d324bf48b12a55c7af7be2bad83, f73316482977ac401ac37245c9df48079d4e11f3 to < b0d26283af612b9e0cc3188b0b88ad7fdea447e8, f73316482977ac401ac37245c9df48079d4e11f3 to < abbce7f82613ea5eeefd0fc3c1c8e449b9cef2a2, f73316482977ac401ac37245c9df48079d4e11f3 to < 3d2af77e31ade05ff7ccc3658c3635ec1bea0979, 5.5—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/58c135513562698f222a58ba07dbdfcfb268aa0d
git.kernel.orghttps://git.kernel.org/stable/c/0561aa6033dd181594116d705c41fc16e97161a2
git.kernel.orghttps://git.kernel.org/stable/c/892faa76be894d324bf48b12a55c7af7be2bad83
git.kernel.orghttps://git.kernel.org/stable/c/b0d26283af612b9e0cc3188b0b88ad7fdea447e8
git.kernel.orghttps://git.kernel.org/stable/c/abbce7f82613ea5eeefd0fc3c1c8e449b9cef2a2
git.kernel.orghttps://git.kernel.org/stable/c/3d2af77e31ade05ff7ccc3658c3635ec1bea0979

01 Record index

CVE-2023-53421

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2023-53421

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References