CVE - CVE-2024-40984

CVE-ID
CVE-2024-40984	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/434c6b924e1f4c219aab2d9e05fe79c5364e37d3 URL:https://git.kernel.org/stable/c/434c6b924e1f4c219aab2d9e05fe79c5364e37d3 MISC:https://git.kernel.org/stable/c/435ecc978c3d5d0c4e172ec5b956dc1904061d98 URL:https://git.kernel.org/stable/c/435ecc978c3d5d0c4e172ec5b956dc1904061d98 MISC:https://git.kernel.org/stable/c/6eca23100e9030725f69c1babacd58803f29ec8d URL:https://git.kernel.org/stable/c/6eca23100e9030725f69c1babacd58803f29ec8d MISC:https://git.kernel.org/stable/c/a83e1385b780d41307433ddbc86e3c528db031f0 URL:https://git.kernel.org/stable/c/a83e1385b780d41307433ddbc86e3c528db031f0 MISC:https://git.kernel.org/stable/c/ae465109d82f4fb03c5adbe85f2d6a6a3d59124c URL:https://git.kernel.org/stable/c/ae465109d82f4fb03c5adbe85f2d6a6a3d59124c MISC:https://git.kernel.org/stable/c/dc5017c57f5eee80020c73ff8b67ba7f9fd08b1f URL:https://git.kernel.org/stable/c/dc5017c57f5eee80020c73ff8b67ba7f9fd08b1f MISC:https://git.kernel.org/stable/c/ddc1f5f124479360a1fd43f73be950781d172239 URL:https://git.kernel.org/stable/c/ddc1f5f124479360a1fd43f73be950781d172239 MISC:https://git.kernel.org/stable/c/e21a4c9129c72fa54dd00f5ebf71219b41d43c04 URL:https://git.kernel.org/stable/c/e21a4c9129c72fa54dd00f5ebf71219b41d43c04
Assigning CNA
kernel.org
Date Record Created
20240712	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240712)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)