01 Record

CVE-2023-53366

block: be a bit more careful in checking for NULL bdev while polling

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

block: be a bit more careful in checking for NULL bdev while polling

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

Equal to or higher than the score of 8.6% 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

2025-09-17 14:56Z1 YR AGO

Last updated

2026-05-11 19:43Z5 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

410eb3d560c9988556742ef72a58fd9fe80d8b2d045fcf28acd21f52893f5263

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxbe4d234d7aebbfe0c233bc20b9cdef7ab3408ff4 to < 1af0bdca03f367874da45d6cbe05fa05b90b1439, be4d234d7aebbfe0c233bc20b9cdef7ab3408ff4 to < 0510d5e654d05053ed0e6309a9b42043ac9903ab, be4d234d7aebbfe0c233bc20b9cdef7ab3408ff4 to < 310726c33ad76cebdee312dbfafc12c1b44bf977, 5.15—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/1af0bdca03f367874da45d6cbe05fa05b90b1439
git.kernel.orghttps://git.kernel.org/stable/c/0510d5e654d05053ed0e6309a9b42043ac9903ab
git.kernel.orghttps://git.kernel.org/stable/c/310726c33ad76cebdee312dbfafc12c1b44bf977

07 Fixed in

Debian 12

linux
Fixed in 6.1.20-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.1.20-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.1.20-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.