Answer in brief
CVE-2025-21844 records a Unknown severity vulnerability in smb: client: Add check for next_buffer in receive_encrypted_standard(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-21844 records a Unknown severity vulnerability in smb: client: Add check for next_buffer in receive_encrypted_standard(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b03c8099a738a04d2343547ae6a04e5f0f63d3fa <f277e479eea3d1aa18bc712abe1d2bf3dece2e30 || >=858e73ff25639a0cc1f6f8d2587b62c045867e41 <f618aeb6cad2307e48a641379db610abcf593edf || >=9f528a8e68327117837b5e28b096f52af4c26a05 <24e8e4523d3071bc5143b0db9127d511489f7b3b || >=534733397da26de0303057ce0b93a22bda150365 <9e5d99a4cf2e23c716b44862975548415fae5391 || >=eec04ea119691e65227a97ce53c0da6b9b74b0b7 <a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd || >=eec04ea119691e65227a97ce53c0da6b9b74b0b7 <554736b583f529ee159aa95af9a0cbc12b5ffc96 || >=eec04ea119691e65227a97ce53c0da6b9b74b0b7 <860ca5e50f73c2a1cef7eefc9d39d04e275417f7 || >=5.10.211 <5.10.235 || >=5.15.150 <5.15.179 || >=6.1.69 <6.1.130 || >=6.6.8 <6.6.80 | f277e479eea3d1aa18bc712abe1d2bf3dece2e30, f618aeb6cad2307e48a641379db610abcf593edf, 24e8e4523d3071bc5143b0db9127d511489f7b3b, 9e5d99a4cf2e23c716b44862975548415fae5391, a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd, 554736b583f529ee159aa95af9a0cbc12b5ffc96, 860ca5e50f73c2a1cef7eefc9d39d04e275417f7, 5.10.235, 5.15.179, 6.1.130, 6.6.80 |
| Linux/Linuxgeneric | 6.7 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 12, 2025
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: smb: client: Add check for next_buffer in receive_encrypted_standard() Add check for the return value of cifs_buf_get() and cifs_small_buf_get() in receive_encrypted_standard() to prevent null pointer dereference.
Quoted source text, attributed separately from HOL analysis.
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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b03c8099a738a04d2343547ae6a04e5f0f63d3fa <f277e479eea3d1aa18bc712abe1d2bf3dece2e30 || >=858e73ff25639a0cc1f6f8d2587b62c045867e41 <f618aeb6cad2307e48a641379db610abcf593edf || >=9f528a8e68327117837b5e28b096f52af4c26a05 <24e8e4523d3071bc5143b0db9127d511489f7b3b || >=534733397da26de0303057ce0b93a22bda150365 <9e5d99a4cf2e23c716b44862975548415fae5391 || >=eec04ea119691e65227a97ce53c0da6b9b74b0b7 <a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd || >=eec04ea119691e65227a97ce53c0da6b9b74b0b7 <554736b583f529ee159aa95af9a0cbc12b5ffc96 || >=eec04ea119691e65227a97ce53c0da6b9b74b0b7 <860ca5e50f73c2a1cef7eefc9d39d04e275417f7 || >=5.10.211 <5.10.235 || >=5.15.150 <5.15.179 || >=6.1.69 <6.1.130 || >=6.6.8 <6.6.80 | f277e479eea3d1aa18bc712abe1d2bf3dece2e30, f618aeb6cad2307e48a641379db610abcf593edf, 24e8e4523d3071bc5143b0db9127d511489f7b3b, 9e5d99a4cf2e23c716b44862975548415fae5391, a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd, 554736b583f529ee159aa95af9a0cbc12b5ffc96, 860ca5e50f73c2a1cef7eefc9d39d04e275417f7, 5.10.235, 5.15.179, 6.1.130, 6.6.80 |
| Linux/Linuxgeneric | 6.7 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 12, 2025
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: smb: client: Add check for next_buffer in receive_encrypted_standard() Add check for the return value of cifs_buf_get() and cifs_small_buf_get() in receive_encrypted_standard() to prevent null pointer dereference.
Quoted source text, attributed separately from HOL analysis.