Answer in brief
CVE-2026-43185 records a Unknown severity vulnerability in ksmbd: fix signededness bug in smb_direct_prepare_negotiation(). 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0626e6641f6b467447c81dd7678a69c66f7746cf <ceae058eb707ddd0d68f0872f9d9f23b7c30c37b || >=0626e6641f6b467447c81dd7678a69c66f7746cf <55abc475d096da4a5356b6efb0cfdc6156bc1550 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <6b4f875aac344cdd52a1f34cc70ed2f874a65757 | ceae058eb707ddd0d68f0872f9d9f23b7c30c37b, 55abc475d096da4a5356b6efb0cfdc6156bc1550, 6b4f875aac344cdd52a1f34cc70ed2f874a65757 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix signededness bug in smb_direct_prepare_negotiation() smb_direct_prepare_negotiation() casts an unsigned __u32 value from sp->max_recv_size and req->preferred_send_size to a signed int before computing min_t(int, ...). A maliciously provided preferred_send_size of 0x80000000 will return as smaller than max_recv_size, and then be used to set the maximum allowed alowed receive size for the next message. By sending a second message with a large value (>1420 bytes) the attacker can then achieve a heap buffer overflow. This fix replaces min_t(int, ...) with min_t(u32)
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-43185 records a Unknown severity vulnerability in ksmbd: fix signededness bug in smb_direct_prepare_negotiation(). 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0626e6641f6b467447c81dd7678a69c66f7746cf <ceae058eb707ddd0d68f0872f9d9f23b7c30c37b || >=0626e6641f6b467447c81dd7678a69c66f7746cf <55abc475d096da4a5356b6efb0cfdc6156bc1550 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <6b4f875aac344cdd52a1f34cc70ed2f874a65757 | ceae058eb707ddd0d68f0872f9d9f23b7c30c37b, 55abc475d096da4a5356b6efb0cfdc6156bc1550, 6b4f875aac344cdd52a1f34cc70ed2f874a65757 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix signededness bug in smb_direct_prepare_negotiation() smb_direct_prepare_negotiation() casts an unsigned __u32 value from sp->max_recv_size and req->preferred_send_size to a signed int before computing min_t(int, ...). A maliciously provided preferred_send_size of 0x80000000 will return as smaller than max_recv_size, and then be used to set the maximum allowed alowed receive size for the next message. By sending a second message with a large value (>1420 bytes) the attacker can then achieve a heap buffer overflow. This fix replaces min_t(int, ...) with min_t(u32)
Quoted source text, attributed separately from HOL analysis.