CVE-2023-52479
ksmbd: fix uaf in smb20_oplock_break_ack
HIGH
8.8
CVSS Score
Published: February 29, 2024 at 05:43 AM UTC
Updated: August 15, 2026 at 01:17 PM UTC
1 product affected across 1 vendorLinux Kernel
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Severity
HIGH8.8
Exploit prediction
EPSS 0.6%
SSVC
No known exploit
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix uaf in smb20_oplock_break_ack drop reference after use opinfo.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 5.15.1355.15 ≤ v < 5.15.1355.15 ≤ v < 6.1.575.15 ≤ v < 6.5.75.15 ≤ v < 6.65.16 ≤ v < 6.1.576.2 ≤ v < 6.5.76.6 rc16.6 rc26.6 rc36.6 rc4e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9
Vendor states this is fixed in 694e13732e830cbbfedb562e57f28644927c33fd (fixed)
Vendor states this is fixed in 8226ffc759ea59f10067b9acdf7f94bae1c69930 (fixed)
Vendor states this is fixed in c69813471a1ec081a0b9bf0c6bd7e8afd818afce (fixed)
Vendor states this is fixed in d5b0e9d3563e7e314a850e81f42b2ef6f39882f9 (fixed)
Vendor states this is fixed in 5.15 (unaffected)
Vendor states this is fixed in 5.15.135 (unaffected)
Vendor states this is fixed in 6.1.57 (unaffected)
Vendor states this is fixed in 6.5.7 (unaffected)
Vendor states this is fixed in 6.6 (unaffected)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (4)
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/694e13732e830cbbfedb562e57f28644927c33fdPatch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8226ffc759ea59f10067b9acdf7f94bae1c69930Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c69813471a1ec081a0b9bf0c6bd7e8afd818afcePatch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d5b0e9d3563e7e314a850e81f42b2ef6f39882f9SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8.8HIGHLinux
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-416
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