In the Linux kernel, the following vulnerability has been resolved:
EFI/CPER: don't go past the ARM processor CPER record buffer
There's a logic inside GHES/CPER to detect if the section_length
is too small, but it doesn't detect if it is too big.
Currently, if the firmware receives an ARM processor CPER record
stating that a section length is big, kernel will blindly trust
section_length, producing a very long dump. For instance, a 67
bytes record with ERR_INFO_NUM set 46198 and section length
set to 854918320 would dump a lot of data going a way past the
firmware memory-mapped area.
Fix it by adding a logic to prevent it to go past the buffer
if ERR_INFO_NUM is too big, making it report instead:
[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1
[Hardware Error]: event severity: recoverable
[Hardware Error]: Error 0, type: recoverable
[Hardware Error]: section_type: ARM processor error
[Hardware Error]: MIDR: 0xff304b2f8476870a
[Hardware Error]: section length: 854918320, CPER size: 67
[Hardware Error]: section length is too big
[Hardware Error]: firmware-generated error record is incorrect
[Hardware Error]: ERR_INFO_NUM is 46198
[ rjw: Subject and changelog tweaks ]
References
Configurations
Configuration 1 (hide)
|
History
08 May 2026, 20:46
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/25b290624b0e3d2f0f90238709ee0b6009b9fde8 - Patch | |
| References | () https://git.kernel.org/stable/c/45766863baf899059e75595dd3cb1116467f2095 - Patch | |
| References | () https://git.kernel.org/stable/c/64eb63f573f497553e1a0c388bbcdd639e0f0704 - Patch | |
| References | () https://git.kernel.org/stable/c/a68d22902a6916e10ee235fee609239004e129d0 - Patch | |
| References | () https://git.kernel.org/stable/c/be10c1bdf64a39832998f54900aa309b3917abcf - Patch | |
| References | () https://git.kernel.org/stable/c/c80113dcfc807308f5ab33847fae77e07531aeb8 - Patch | |
| References | () https://git.kernel.org/stable/c/ca2aad8771aa9091bc9e42e7d546bd40b72ddcd4 - Patch | |
| References | () https://git.kernel.org/stable/c/eae21beecb95a3b69ee5c38a659f774e171d730e - Patch | |
| CWE | NVD-CWE-noinfo |
06 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-06 12:16
Updated : 2026-05-08 20:46
NVD link : CVE-2026-43266
Mitre link : CVE-2026-43266
CVE.ORG link : CVE-2026-43266
JSON object : View
Products Affected
linux
- linux_kernel
CWE