01 Record

CVE-2023-53273

Drivers: vmbus: Check for channel allocation before looking up relids

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

View raw JSON

02 Description

Drivers: vmbus: Check for channel allocation before looking up relids

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

0.15% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 5.2% 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

2025-09-16 08:11Z11 MO AGO

Last updated

2026-05-11 19:41Z3 MO AGO

Reserved

2025-09-16

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

6c56a4f1fe1c9e496dc8dcc4bb7f4afb6a66df0357023394699ef1e37ed03ac5

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < 176c6b4889195fbe7016d9401175b48c5c9edf68, 8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < c373e49fbb87aa177819866ed9194ebc5414dfd6, 8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < 8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee, 8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < a5c44f3446a0565139b7d8abc78f58b86c398123, 8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < 1eb65c8687316c65140b48fad27133d583178e15, 5.8—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/176c6b4889195fbe7016d9401175b48c5c9edf68
git.kernel.orghttps://git.kernel.org/stable/c/c373e49fbb87aa177819866ed9194ebc5414dfd6
git.kernel.orghttps://git.kernel.org/stable/c/8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee
git.kernel.orghttps://git.kernel.org/stable/c/a5c44f3446a0565139b7d8abc78f58b86c398123
git.kernel.orghttps://git.kernel.org/stable/c/1eb65c8687316c65140b48fad27133d583178e15

01 Record index

CVE-2023-53273

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2023-53273

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References