01 Record

CVE-2026-45972

smb: client: fix potential UAF and double free in smb2_open_file()

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

smb: client: fix potential UAF and double free in smb2_open_file()

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.33% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 26.1% of scored records. A rank, not a probability.
NVD base score: 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-07-15.
Red Hat severity: Important. 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

2026-05-27 12:18Z3 MO AGO

Last updated

2026-08-05 12:28Z1 MO AGO

Reserved

2026-05-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-416Use After FreeVariant
CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

4c6eb3bbffafb80f4a3302db8f64756967aa2f09c68f244a8c161cdb0053d9c9

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux743f70406264348c0830f38409eb6c40a42fb2db to < 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74, 3a6d6b332f92990958602c1e35ce0173e2dd62e9 to < 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151, b64e3b5d8d759dd4333992e4ba4dadf9359952c8 to < 4d339b219004869e96c4ce56b8891f83a38da4c0, 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 to < e66dcf7bb9c4df5582c82bc3582725abcbfbea73, e3a43633023e3cacaca60d4b8972d084a2b06236 to < 639deb962986ef2f5e2a6d5a600c66f922471e81, e3a43633023e3cacaca60d4b8972d084a2b06236 to < ebbbc4bfad4cb355d17c671223d0814ee3ef4eda, 6.1.163 to < 6.1.165, 6.6.124 to < 6.6.128, 6.12.70 to < 6.12.75, 6.18.10 to < 6.18.14, 6.19—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74
git.kernel.orghttps://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151
git.kernel.orghttps://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0
git.kernel.orghttps://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73
git.kernel.orghttps://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81
git.kernel.orghttps://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-45972vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2481973https://bugzilla.redhat.com/show_bug.cgi?id=2481973issue-trackingx_refsource_REDHAT
security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.jsonx_sadp-csaf-vex

01 Record index

CVE-2026-45972

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-45972

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References