01 Record

CVE-2026-53390

ksmbd: fix out-of-bounds read in smb_check_perm_dacl()

HighPUBLISHEDCNA: Linux

CNA base score8.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

View raw JSON

02 Description

ksmbd: fix out-of-bounds read in smb_check_perm_dacl()

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: 0.47% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 40.3% of scored records. A rank, not a probability.
NVD base score: 8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD analysis status: Analyzed. NVD last modified this record on 2026-08-17.
Red Hat severity: Low. 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

2026-07-19 12:01Z3 MO AGO

Last updated

2026-08-17 04:50Z2 MO AGO

Reserved

2026-06-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.1)

CNA CVSS vector

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

Weaknesses

CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

5685c8decbdfafa5fca29feac39f529b66c0bf5323e83db3917148f96dedf5c7

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux282cbbb476b9f35793452bc461934af4c7eca169 to < c7488c85fd822959e9b5c22fbd9e7c8a21caf5e0, f20adc4ef7428bc485ee83fd1a592252fb87718b to < 988c93d3bba066d8669143e6ec30bb2be9608d53, 325d4ac11f526cb8964cff14548ccf02d8c756d8 to < 36599894fa8536fefdf1e296c0af71b8b7226859, 95e5aa3c3261da8c95b27d7aecf8ee39b9f86a4c to < d5c81a095c86fe507c032d08f3a8cfc518444927, 90089584b2e25c4510b7b987387b4405f0673ece to < 7627ff8c4f9919f14de562b0160ab4ec9d80b1f7, d07b26f39246a82399661936dd0c853983cfade7 to < e36e35660adb9b8ef1435ac359151dda5f094c55, d07b26f39246a82399661936dd0c853983cfade7 to < 1ef06004ed4bd6d3ed8c840d9d1a376b66d4935b, 151b1799861fde38087c08f613abc2843ef597b0, 5.15.210 to < 5.15.212, 6.1.176 to < 6.1.177, 6.6.140 to < 6.6.144, 6.12.84 to < 6.12.95, 6.18.25 to < 6.18.38, 7.0.2 to < 7.1, 7.1—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/c7488c85fd822959e9b5c22fbd9e7c8a21caf5e0
git.kernel.orghttps://git.kernel.org/stable/c/988c93d3bba066d8669143e6ec30bb2be9608d53
git.kernel.orghttps://git.kernel.org/stable/c/36599894fa8536fefdf1e296c0af71b8b7226859
git.kernel.orghttps://git.kernel.org/stable/c/d5c81a095c86fe507c032d08f3a8cfc518444927
git.kernel.orghttps://git.kernel.org/stable/c/7627ff8c4f9919f14de562b0160ab4ec9d80b1f7
git.kernel.orghttps://git.kernel.org/stable/c/e36e35660adb9b8ef1435ac359151dda5f094c55
git.kernel.orghttps://git.kernel.org/stable/c/1ef06004ed4bd6d3ed8c840d9d1a376b66d4935b

07 Fixed in

Debian 12

linux
Fixed in 6.1.177-1

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

Debian 13

linux
Fixed in 6.12.95-1

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

Debian 14

linux
Fixed in 7.1.3-1

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