Answer in brief
CVE-2025-38478 records a Unknown severity vulnerability in comedi: Fix initialization of data for instructions that write to subdevice. 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.
Answer in brief
CVE-2025-38478 records a Unknown severity vulnerability in comedi: Fix initialization of data for instructions that write to subdevice. 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 | >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <6f38c6380c3b38a05032b8881e41137385a6ce02 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <13e4d9038a1e869445a996a3f604a84ef52fe8f4 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <020eed5681d0f9bced73970368078a92d6cfaa9c || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <d3436638738ace8f101af7bdee2eae1bc38e9b29 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <673ee92bd2d31055bca98a1d96b653f5284289c4 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <c42116dc70af6664526f7aa82cf937824ab42649 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <fe8713fb4e4e82a4f91910d9a41bf0613e69a0b9 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <46d8c744136ce2454aa4c35c138cc06817f92b8e | 6f38c6380c3b38a05032b8881e41137385a6ce02, 13e4d9038a1e869445a996a3f604a84ef52fe8f4, 020eed5681d0f9bced73970368078a92d6cfaa9c, d3436638738ace8f101af7bdee2eae1bc38e9b29, 673ee92bd2d31055bca98a1d96b653f5284289c4, c42116dc70af6664526f7aa82cf937824ab42649, fe8713fb4e4e82a4f91910d9a41bf0613e69a0b9, 46d8c744136ce2454aa4c35c138cc06817f92b8e |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
Published upstream
Jul 28, 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: comedi: Fix initialization of data for instructions that write to subdevice Some Comedi subdevice instruction handlers are known to access instruction data elements beyond the first `insn->n` elements in some cases. The `do_insn_ioctl()` and `do_insnlist_ioctl()` functions allocate at least `MIN_SAMPLES` (16) data elements to deal with this, but they do not initialize all of that. For Comedi instruction codes that write to the subdevice, the first `insn->n` data elements are copied from user-space, but the remaining elements are left uninitialized. That could be a problem if the subdevice instruction handler reads the uninitialized data. Ensure that the first `MIN_SAMPLES` elements are initialized before calling these instruction handlers, filling the uncopied elements with 0. For `do_insnlist_ioctl()`, the same data buffer elements are used for handling a list of instructions, so ensure the first `MIN_SAMPLES` elements are initialized for each instruction that writes to the subdevice.
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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <6f38c6380c3b38a05032b8881e41137385a6ce02 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <13e4d9038a1e869445a996a3f604a84ef52fe8f4 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <020eed5681d0f9bced73970368078a92d6cfaa9c || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <d3436638738ace8f101af7bdee2eae1bc38e9b29 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <673ee92bd2d31055bca98a1d96b653f5284289c4 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <c42116dc70af6664526f7aa82cf937824ab42649 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <fe8713fb4e4e82a4f91910d9a41bf0613e69a0b9 || >=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <46d8c744136ce2454aa4c35c138cc06817f92b8e | 6f38c6380c3b38a05032b8881e41137385a6ce02, 13e4d9038a1e869445a996a3f604a84ef52fe8f4, 020eed5681d0f9bced73970368078a92d6cfaa9c, d3436638738ace8f101af7bdee2eae1bc38e9b29, 673ee92bd2d31055bca98a1d96b653f5284289c4, c42116dc70af6664526f7aa82cf937824ab42649, fe8713fb4e4e82a4f91910d9a41bf0613e69a0b9, 46d8c744136ce2454aa4c35c138cc06817f92b8e |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
Published upstream
Jul 28, 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: comedi: Fix initialization of data for instructions that write to subdevice Some Comedi subdevice instruction handlers are known to access instruction data elements beyond the first `insn->n` elements in some cases. The `do_insn_ioctl()` and `do_insnlist_ioctl()` functions allocate at least `MIN_SAMPLES` (16) data elements to deal with this, but they do not initialize all of that. For Comedi instruction codes that write to the subdevice, the first `insn->n` data elements are copied from user-space, but the remaining elements are left uninitialized. That could be a problem if the subdevice instruction handler reads the uninitialized data. Ensure that the first `MIN_SAMPLES` elements are initialized before calling these instruction handlers, filling the uncopied elements with 0. For `do_insnlist_ioctl()`, the same data buffer elements are used for handling a list of instructions, so ensure the first `MIN_SAMPLES` elements are initialized for each instruction that writes to the subdevice.
Quoted source text, attributed separately from HOL analysis.