01 Record

CVE-2026-23230

smb: client: split cached_fid bitfields to avoid shared-byte RMW races

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

View raw JSON

02 Description

smb: client: split cached_fid bitfields to avoid shared-byte RMW races

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 ImpacttotalSuccessful exploitation gives total 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

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 20.0% 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 2026-10-19.

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

2026-02-18 14:53Z8 MO AGO

Last updated

2026-10-19 18:35Z10 DAYS AGO

Reserved

2026-01-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
CWE-821Incorrect SynchronizationBase

Data version

5.2

Document digest

bdb511ac71f58cd4812cef1471d749d6b86c6187342f3cf27d534064aa27bf8e

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxebe98f1447bbccf8228335c62d86af02a0ed23f7 to < 569fecc56bfe4df66f05734d67daef887746656b, ebe98f1447bbccf8228335c62d86af02a0ed23f7 to < 4386f6af8aaedd0c5ad6f659b40cadcc8f423828, ebe98f1447bbccf8228335c62d86af02a0ed23f7 to < 3eaa22d688311c708b73f3c68bc6d0c8e3f0f77a, ebe98f1447bbccf8228335c62d86af02a0ed23f7 to < c4b9edd55987384a1f201d3d07ff71e448d79c1b, ebe98f1447bbccf8228335c62d86af02a0ed23f7 to < 4cfa4c37dcbcfd70866e856200ed8a2894cac578, ebe98f1447bbccf8228335c62d86af02a0ed23f7 to < ec306600d5ba7148c9dbf8f5a8f1f5c1a044a241, 6.1—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/569fecc56bfe4df66f05734d67daef887746656b
git.kernel.orghttps://git.kernel.org/stable/c/4386f6af8aaedd0c5ad6f659b40cadcc8f423828
git.kernel.orghttps://git.kernel.org/stable/c/3eaa22d688311c708b73f3c68bc6d0c8e3f0f77a
git.kernel.orghttps://git.kernel.org/stable/c/c4b9edd55987384a1f201d3d07ff71e448d79c1b
git.kernel.orghttps://git.kernel.org/stable/c/4cfa4c37dcbcfd70866e856200ed8a2894cac578
git.kernel.orghttps://git.kernel.org/stable/c/ec306600d5ba7148c9dbf8f5a8f1f5c1a044a241
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-253495.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.164-1

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

Debian 13

linux
Fixed in 6.12.73-1

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

Debian 14

linux
Fixed in 6.18.12-1

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