ksmbd: fix uaf in smb20_oplock_break_ack (CVE-2023-52479) | HOL Guard CVE

High · CVSS 8.8CVE-2023-52479

ksmbd: fix uaf in smb20_oplock_break_ack

Answer in brief

CVE-2023-52479 records a High severity (CVSS 8.8) vulnerability in ksmbd: fix uaf in smb20_oplock_break_ack. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 29, 2024Updated Aug 5, 2026Source checked Aug 5, 2026First seen by HOL Aug 4, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 7 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc1::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc2::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc3::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc4::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=0626e6641f6b467447c81dd7678a69c66f7746cf <694e13732e830cbbfedb562e57f28644927c33fd \|\| >=0626e6641f6b467447c81dd7678a69c66f7746cf <8226ffc759ea59f10067b9acdf7f94bae1c69930 \|\| >=0626e6641f6b467447c81dd7678a69c66f7746cf <d5b0e9d3563e7e314a850e81f42b2ef6f39882f9 \|\| >=0626e6641f6b467447c81dd7678a69c66f7746cf <c69813471a1ec081a0b9bf0c6bd7e8afd818afce	694e13732e830cbbfedb562e57f28644927c33fd, 8226ffc759ea59f10067b9acdf7f94bae1c69930, d5b0e9d3563e7e314a850e81f42b2ef6f39882f9, c69813471a1ec081a0b9bf0c6bd7e8afd818afce
Linux/Linuxgeneric	5.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 694e13732e830cbbfedb562e57f28644927c33fd if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Feb 29, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix uaf in smb20_oplock_break_ack drop reference after use opinfo.

Quoted source text, attributed separately from HOL analysis.

Back to active CVEs

High · CVSS 8.8CVE-2023-52479

ksmbd: fix uaf in smb20_oplock_break_ack

Answer in brief

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 29, 2024Updated Aug 5, 2026Source checked Aug 5, 2026First seen by HOL Aug 4, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 7 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc1::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc2::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc3::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:6.6:rc4::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=0626e6641f6b467447c81dd7678a69c66f7746cf <694e13732e830cbbfedb562e57f28644927c33fd \|\| >=0626e6641f6b467447c81dd7678a69c66f7746cf <8226ffc759ea59f10067b9acdf7f94bae1c69930 \|\| >=0626e6641f6b467447c81dd7678a69c66f7746cf <d5b0e9d3563e7e314a850e81f42b2ef6f39882f9 \|\| >=0626e6641f6b467447c81dd7678a69c66f7746cf <c69813471a1ec081a0b9bf0c6bd7e8afd818afce	694e13732e830cbbfedb562e57f28644927c33fd, 8226ffc759ea59f10067b9acdf7f94bae1c69930, d5b0e9d3563e7e314a850e81f42b2ef6f39882f9, c69813471a1ec081a0b9bf0c6bd7e8afd818afce
Linux/Linuxgeneric	5.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 694e13732e830cbbfedb562e57f28644927c33fd if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Feb 29, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix uaf in smb20_oplock_break_ack drop reference after use opinfo.

Quoted source text, attributed separately from HOL analysis.

ksmbd: fix uaf in smb20_oplock_break_ack

Key facts

Why this deserves its current priority

Affected scope and exposure questions

Recommended response

Evidence timeline and material changes

Sources and claim methodology

Related CVEs

ksmbd: fix uaf in smb20_oplock_break_ack

Key facts

Why this deserves its current priority

Affected scope and exposure questions

Recommended response

Evidence timeline and material changes

Sources and claim methodology

Related CVEs