CVE-2026-43171
Description
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 ]
How to fix
- linux linux_kernel5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6 or later
- git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33
- git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d
- git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6
- git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec
- git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334
- git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff
- git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3
- git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.7 < v < 5.10.252, 5.11 ≤ v < 5.15.202, 5.16 ≤ v < 6.1.165, 6.2 ≤ v < 6.6.128, 6.7 ≤ v < 6.12.75, 6.13 ≤ v < 6.18.16, 6.19 ≤ v < 6.19.6, 5.7 | 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6 |
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