EFI/CPER: don't dump the entire memory region (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.12 % · percentile 2 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
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 ]
Weaknesses (CWE)
- CWE-191 — Integer Underflow (Wrap or Wraparound)
References
- https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33
- https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d
- https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff
- https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334
- https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3
- https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91
- https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6
- https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-27730
- GCVE · GCVE-0-2026-43171
CERT-FR advisories
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1093 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0985 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0956 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0954 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0927 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0926 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0864 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0861 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0833 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0831 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0696 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*> 5.7 < 5.10.252cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.202cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.165cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.128cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.75cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.18.16cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19 < 6.19.6cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.7:rc7:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 02de64ab54b4bb0f1b21bb324aeff3b08612be33 ; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 0e09b522f2622841389c3b2f9ac4969e35c0809d ; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff ; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 5a9b1dda8481b82851a655c3bcc5b44879b95334 ; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 7780c0bad2a3a70a8c0113a33c02f4151d901eb3 ; affected 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91 |
| Linux · Linux | affected 5.7 ; unaffected 0 < 5.7 ; unaffected 5.10.252 ≤ 5.10.* ; unaffected 5.15.202 ≤ 5.15.* ; unaffected 6.1.165 ≤ 6.1.* ; unaffected 6.6.128 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |