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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d410ee5109a1633a686a5663c6743a92e1181f9b to < 435ecc978c3d5d0c4e172ec5b956dc1904061d98affectedd410ee5109a1633a686a5663c6743a92e1181f9b to < ae465109d82f4fb03c5adbe85f2d6a6a3d59124caffectedd410ee5109a1633a686a5663c6743a92e1181f9b to < 6eca23100e9030725f69c1babacd58803f29ec8daffectedd410ee5109a1633a686a5663c6743a92e1181f9b to < dc5017c57f5eee80020c73ff8b67ba7f9fd08b1faffectedd410ee5109a1633a686a5663c6743a92e1181f9b to < ddc1f5f124479360a1fd43f73be950781d172239affectedd410ee5109a1633a686a5663c6743a92e1181f9b to < 434c6b924e1f4c219aab2d9e05fe79c5364e37d3affectedd410ee5109a1633a686a5663c6743a92e1181f9b to < e21a4c9129c72fa54dd00f5ebf71219b41d43c04affectedd410ee5109a1633a686a5663c6743a92e1181f9b to < a83e1385b780d41307433ddbc86e3c528db031f0affected
Linux Linux
Default version status: affected
2.6.32affected0 to < 2.6.32unaffected4.19.317 to ≤ 4.19.*unaffected5.4.279 to ≤ 5.4.*unaffected5.10.221 to ≤ 5.10.*unaffected5.15.162 to ≤ 5.15.*unaffected6.1.96 to ≤ 6.1.*unaffected6.6.36 to ≤ 6.6.*unaffected6.9.7 to ≤ 6.9.*unaffected6.10 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/435ecc978c3d5d0c4e172ec5b956dc1904061d98 ↗
- https://git.kernel.org/stable/c/ae465109d82f4fb03c5adbe85f2d6a6a3d59124c ↗
- https://git.kernel.org/stable/c/6eca23100e9030725f69c1babacd58803f29ec8d ↗
- https://git.kernel.org/stable/c/dc5017c57f5eee80020c73ff8b67ba7f9fd08b1f ↗
- https://git.kernel.org/stable/c/ddc1f5f124479360a1fd43f73be950781d172239 ↗
- https://git.kernel.org/stable/c/434c6b924e1f4c219aab2d9e05fe79c5364e37d3 ↗
- https://git.kernel.org/stable/c/e21a4c9129c72fa54dd00f5ebf71219b41d43c04 ↗
- https://git.kernel.org/stable/c/a83e1385b780d41307433ddbc86e3c528db031f0 ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html ↗