s390/mm: Do not map lowcore with identity mapping (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.17 % · percentile 6 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: s390/mm: Do not map lowcore with identity mapping Since the identity mapping is pinned to address zero the lowcore is always also mapped to address zero, this happens regardless of the relocate_lowcore command line option. If the option is specified the lowcore is mapped twice, instead of only once. This means that NULL pointer accesses will succeed instead of causing an exception (low address protection still applies, but covers only parts). To fix this never map the first two pages of physical memory with the identity mapping.
Weaknesses (CWE)
- CWE-476 — NULL Pointer Dereference
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| 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-2025-31556
- GCVE · GCVE-0-2025-38733
CERT-FR advisories
- CERTFR-2025-AVI-1073 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0825 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.10.11 < 6.11cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.11.1 < 6.12.44cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.16.4cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 32db401965f165f7c44447d0508097f070c8f576 < 30bf5728bb217a6d1ba73f44094c9b9c6bc9a567 ; affected 32db401965f165f7c44447d0508097f070c8f576 < 1d7864acd497cb468a998d44631f84896f885e85 ; affected 32db401965f165f7c44447d0508097f070c8f576 < 93f616ff870a1fb7e84d472cad0af651b18f9f87 ; affected 0b99d0e17d6a73a0526f92bc6b54b2b95e67a31d ; affected 6.10.11 < 6.11 |
| Linux · Linux | affected 6.11 ; unaffected 0 < 6.11 ; unaffected 6.12.44 ≤ 6.12.* ; unaffected 6.16.4 ≤ 6.16.* ; unaffected 6.17 ≤ * |
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 |