Answer in brief
CVE-2024-40984 records a High severity (CVSS 7.8) vulnerability in ACPICA: Revert "ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine.". The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 family (generic) and additional mapped packages. 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 7.8. 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), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 family (generic) and additional mapped packages. 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:6.10:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d410ee5109a1633a686a5663c6743a92e1181f9b <435ecc978c3d5d0c4e172ec5b956dc1904061d98 || >=d410ee5109a1633a686a5663c6743a92e1181f9b <ae465109d82f4fb03c5adbe85f2d6a6a3d59124c || >=d410ee5109a1633a686a5663c6743a92e1181f9b <6eca23100e9030725f69c1babacd58803f29ec8d || >=d410ee5109a1633a686a5663c6743a92e1181f9b <dc5017c57f5eee80020c73ff8b67ba7f9fd08b1f || >=d410ee5109a1633a686a5663c6743a92e1181f9b <ddc1f5f124479360a1fd43f73be950781d172239 || >=d410ee5109a1633a686a5663c6743a92e1181f9b <434c6b924e1f4c219aab2d9e05fe79c5364e37d3 || >=d410ee5109a1633a686a5663c6743a92e1181f9b <e21a4c9129c72fa54dd00f5ebf71219b41d43c04 || >=d410ee5109a1633a686a5663c6743a92e1181f9b <a83e1385b780d41307433ddbc86e3c528db031f0 | 435ecc978c3d5d0c4e172ec5b956dc1904061d98, ae465109d82f4fb03c5adbe85f2d6a6a3d59124c, 6eca23100e9030725f69c1babacd58803f29ec8d, dc5017c57f5eee80020c73ff8b67ba7f9fd08b1f, ddc1f5f124479360a1fd43f73be950781d172239, 434c6b924e1f4c219aab2d9e05fe79c5364e37d3, e21a4c9129c72fa54dd00f5ebf71219b41d43c04, a83e1385b780d41307433ddbc86e3c528db031f0 |
| Linux/Linuxgeneric | 2.6.32 | Not reported |
| Siemens/RUGGEDCOM RST2428Pgeneric | >=0 <V3.1 | V3.1 |
| Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 familygeneric | >=0 <V3.1 | V3.1 |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <V1.1.1 | V1.1.1 |
Published upstream
Jul 12, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 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: ACPICA: Revert "ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine." Undo the modifications made in commit d410ee5109a1 ("ACPICA: avoid "Info: mapping multiple BARs. Your kernel is fine.""). The initial purpose of this commit was to stop memory mappings for operation regions from overlapping page boundaries, as it can trigger warnings if different page attributes are present. However, it was found that when this situation arises, mapping continues until the boundary's end, but there is still an attempt to read/write the entire length of the map, leading to a NULL pointer deference. For example, if a four-byte mapping request is made but only one byte is mapped because it hits the current page boundary's end, a four-byte read/write attempt is still made, resulting in a NULL pointer deference. Instead, map the entire length, as the ACPI specification does not mandate that it must be within the same page boundary. It is permissible for it to be mapped across different regions.
Quoted source text, attributed separately from HOL analysis.