riscv: mm: Fix the out of bound issue of vmemmap address (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.21 % · percentile 12 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: riscv: mm: Fix the out of bound issue of vmemmap address In sparse vmemmap model, the virtual address of vmemmap is calculated as: ((struct page *)VMEMMAP_START - (phys_ram_base >> PAGE_SHIFT)). And the struct page's va can be calculated with an offset: (vmemmap + (pfn)). However, when initializing struct pages, kernel actually starts from the first page from the same section that phys_ram_base belongs to. If the first page's physical address is not (phys_ram_base >> PAGE_SHIFT), then we get an va below VMEMMAP_START when calculating va for it's struct page. For example, if phys_ram_base starts from 0x82000000 with pfn 0x82000, the first page in the same section is actually pfn 0x80000. During init_unavailable_range(), we will initialize struct page for pfn 0x80000 with virtual address ((struct page *)VMEMMAP_START - 0x2000), which is below VMEMMAP_START as well as PCI_IO_END. This commit fixes this bug by introducing a new variable 'vmemmap_start_pfn' which is aligned with memory section size and using it to calculate vmemmap address instead of phys_ram_base.
Weaknesses (CWE)
- CWE-125 — Out-of-bounds Read
References
- https://git.kernel.org/stable/c/04350304428063da6a55a8a4597d409dc69148b2
- https://git.kernel.org/stable/c/92f08673d3f1893191323572f60e3c62f2e57c2f
- https://git.kernel.org/stable/c/a4a7ac3d266008018f05fae53060fcb331151a14
- https://git.kernel.org/stable/c/d2bd51954ac8377c2f1eb1813e694788998add66
- https://git.kernel.org/stable/c/f754f27e98f88428aaf6be6e00f5cbce97f62d4b
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
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 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2024-53848
- GCVE · GCVE-0-2024-57945
CERT-FR advisories
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0697 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0464 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0254 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.10.212 < 5.11cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.15.151 < 5.16cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.1.81 < 6.1.140cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.6.21 < 6.6.72cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7.9 < 6.8cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.8.1 < 6.12.10cpe:2.3:o:linux:linux_kernel:6.8:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 8af1c121b0102041809bc137ec600d1865eaeedd < 04350304428063da6a55a8a4597d409dc69148b2 ; affected 8310080799b40fd9f2a8b808c657269678c149af < 92f08673d3f1893191323572f60e3c62f2e57c2f ; affected a278d5c60f21aa15d540abb2f2da6e6d795c3e6e < a4a7ac3d266008018f05fae53060fcb331151a14 ; affected a11dd49dcb9376776193e15641f84fcc1e5980c9 < d2bd51954ac8377c2f1eb1813e694788998add66 ; affected a11dd49dcb9376776193e15641f84fcc1e5980c9 < f754f27e98f88428aaf6be6e00f5cbce97f62d4b ; affected 5941a90c55d3bfba732b32208d58d997600b44ef |
| Linux · Linux | affected 6.8 ; unaffected 0 < 6.8 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 6.1.140 ≤ 6.1.* ; unaffected 6.6.72 ≤ 6.6.* ; unaffected 6.12.10 ≤ 6.12.* |
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 |