Answer in brief
CVE-2023-52480 records a Critical severity (CVSS 9.8) vulnerability in ksmbd: fix race condition between session lookup and expire. 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.
CVSS is 9.8. 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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| 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 |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0626e6641f6b467447c81dd7678a69c66f7746cf <c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f || >=0626e6641f6b467447c81dd7678a69c66f7746cf <a2ca5fd3dbcc665e1169044fa0c9e3eba779202b || >=0626e6641f6b467447c81dd7678a69c66f7746cf <18ced78b0ebccc2d16f426143dc56ab3aad666be || >=0626e6641f6b467447c81dd7678a69c66f7746cf <53ff5cf89142b978b1a5ca8dc4d4425e6a09745f | c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f, a2ca5fd3dbcc665e1169044fa0c9e3eba779202b, 18ced78b0ebccc2d16f426143dc56ab3aad666be, 53ff5cf89142b978b1a5ca8dc4d4425e6a09745f |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Feb 29, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix race condition between session lookup and expire Thread A + Thread B ksmbd_session_lookup | smb2_sess_setup sess = xa_load | | | xa_erase(&conn->sessions, sess->id); | | ksmbd_session_destroy(sess) --> kfree(sess) | // UAF! | sess->last_active = jiffies | + This patch add rwsem to fix race condition between ksmbd_session_lookup and ksmbd_expire_session.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-52480 records a Critical severity (CVSS 9.8) vulnerability in ksmbd: fix race condition between session lookup and expire. 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.
CVSS is 9.8. 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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| 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 |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0626e6641f6b467447c81dd7678a69c66f7746cf <c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f || >=0626e6641f6b467447c81dd7678a69c66f7746cf <a2ca5fd3dbcc665e1169044fa0c9e3eba779202b || >=0626e6641f6b467447c81dd7678a69c66f7746cf <18ced78b0ebccc2d16f426143dc56ab3aad666be || >=0626e6641f6b467447c81dd7678a69c66f7746cf <53ff5cf89142b978b1a5ca8dc4d4425e6a09745f | c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f, a2ca5fd3dbcc665e1169044fa0c9e3eba779202b, 18ced78b0ebccc2d16f426143dc56ab3aad666be, 53ff5cf89142b978b1a5ca8dc4d4425e6a09745f |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Feb 29, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix race condition between session lookup and expire Thread A + Thread B ksmbd_session_lookup | smb2_sess_setup sess = xa_load | | | xa_erase(&conn->sessions, sess->id); | | ksmbd_session_destroy(sess) --> kfree(sess) | // UAF! | sess->last_active = jiffies | + This patch add rwsem to fix race condition between ksmbd_session_lookup and ksmbd_expire_session.
Quoted source text, attributed separately from HOL analysis.