5.5

CVE-2024-40984

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.
Data is provided by the National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.32 < 4.19.317
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.279
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.221
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.162
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.96
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.36
Linux ≫ Linux Kernel Version >= 6.7 < 6.9.7
Linux ≫ Linux Kernel Version6.10 Updaterc1
Linux ≫ Linux Kernel Version6.10 Updaterc2
Linux ≫ Linux Kernel Version6.10 Updaterc3
Linux ≫ Linux Kernel Version6.10 Updaterc4
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.02% 0.032
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.