In the Linux kernel, the following vulnerability has been resolved:
EFI/CPER: don't dump the entire memory region
The current logic at cper_print_fw_err() doesn't check if the
error record length is big enough to handle offset. On a bad firmware,
if the ofset is above the actual record, length -= offset will
underflow, making it dump the entire memory.
The end result can be:
- the logic taking a lot of time dumping large regions of memory;
- data disclosure due to the memory dumps;
- an OOPS, if it tries to dump an unmapped memory region.
Fix it by checking if the section length is too small before doing
a hex dump.
[ rjw: Subject tweaks ]
References
Configurations
Configuration 1 (hide)
|
History
13 May 2026, 14:55
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33 - Patch | |
| References | () https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d - Patch | |
| References | () https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6 - Patch | |
| References | () https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec - Patch | |
| References | () https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334 - Patch | |
| References | () https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff - Patch | |
| References | () https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3 - Patch | |
| References | () https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91 - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-191 | |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:5.7:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:* |
06 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-06 12:16
Updated : 2026-05-13 14:55
NVD link : CVE-2026-43171
Mitre link : CVE-2026-43171
CVE.ORG link : CVE-2026-43171
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-191
Integer Underflow (Wrap or Wraparound)