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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 ]

PUBLISHED Reserved 2026-05-01 | Published 2026-05-06 | Updated 2026-05-07 | Assigner Linux

Product status

Default status
unaffected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before 02de64ab54b4bb0f1b21bb324aeff3b08612be33
affected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before 0e09b522f2622841389c3b2f9ac4969e35c0809d
affected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff
affected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before 5a9b1dda8481b82851a655c3bcc5b44879b95334
affected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before 7780c0bad2a3a70a8c0113a33c02f4151d901eb3
affected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91
affected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before 54e131db4cdffd946db890ff33ff2647053fd4f6
affected

3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 (git) before 55cc6fe5716f678f06bcb95140882dfa684464ec
affected

Default status
affected

5.7
affected

Any version before 5.7
unaffected

5.10.252 (semver)
unaffected

5.15.202 (semver)
unaffected

6.1.165 (semver)
unaffected

6.6.128 (semver)
unaffected

6.12.75 (semver)
unaffected

6.18.16 (semver)
unaffected

6.19.6 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/02de64ab54b4bb0f1b21bb324aeff3b08612be33

git.kernel.org/...c/0e09b522f2622841389c3b2f9ac4969e35c0809d

git.kernel.org/...c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff

git.kernel.org/...c/5a9b1dda8481b82851a655c3bcc5b44879b95334

git.kernel.org/...c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3

git.kernel.org/...c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91

git.kernel.org/...c/54e131db4cdffd946db890ff33ff2647053fd4f6

git.kernel.org/...c/55cc6fe5716f678f06bcb95140882dfa684464ec

cve.org (CVE-2026-43171)

nvd.nist.gov (CVE-2026-43171)

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