powerpc/kasan: Fix addr error caused by page alignment (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 16 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/kasan: Fix addr error caused by page alignment In kasan_init_region, when k_start is not page aligned, at the begin of for loop, k_cur = k_start & PAGE_MASK is less than k_start, and then `va = block + k_cur - k_start` is less than block, the addr va is invalid, because the memory address space from va to block is not alloced by memblock_alloc, which will not be reserved by memblock_reserve later, it will be used by other places. As a result, memory overwriting occurs. for example: int __init __weak kasan_init_region(void *start, size_t size) { [...] /* if say block(dcd97000) k_start(feef7400) k_end(feeff3fe) */ block = memblock_alloc(k_end - k_start, PAGE_SIZE); [...] for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) { /* at the begin of for loop * block(dcd97000) va(dcd96c00) k_cur(feef7000) k_start(feef7400) * va(dcd96c00) is less than block(dcd97000), va is invalid */ void *va = block + k_cur - k_start; [...] } [...] } Therefore, page alignment is performed on k_start before memblock_alloc() to ensure the validity of the VA address.
References
- https://git.kernel.org/stable/c/230e89b5ad0a33f530a2a976b3e5e4385cb27882
- https://git.kernel.org/stable/c/2738e0aa2fb24a7ab9c878d912dc2b239738c6c6
- https://git.kernel.org/stable/c/0c09912dd8387e228afcc5e34ac5d79b1e3a1058
- https://git.kernel.org/stable/c/0516c06b19dc64807c10e01bb99b552bdf2d7dbe
- https://git.kernel.org/stable/c/70ef2ba1f4286b2b73675aeb424b590c92d57b25
- https://git.kernel.org/stable/c/4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.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 | MEDIUM 4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| 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 4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2024-23974
- GCVE · GCVE-0-2024-26712
CERT-FR advisories
- CERTFR-2024-AVI-0667 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0633 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0611 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0527 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0456 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0439 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0422 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0383 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0381 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0334 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.4 < 5.10.210cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.149cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.79cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.18cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.7.6cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 663c0c9496a69f80011205ba3194049bcafd681d < 230e89b5ad0a33f530a2a976b3e5e4385cb27882 ; affected 663c0c9496a69f80011205ba3194049bcafd681d < 2738e0aa2fb24a7ab9c878d912dc2b239738c6c6 ; affected 663c0c9496a69f80011205ba3194049bcafd681d < 0c09912dd8387e228afcc5e34ac5d79b1e3a1058 ; affected 663c0c9496a69f80011205ba3194049bcafd681d < 0516c06b19dc64807c10e01bb99b552bdf2d7dbe ; affected 663c0c9496a69f80011205ba3194049bcafd681d < 70ef2ba1f4286b2b73675aeb424b590c92d57b25 ; affected 663c0c9496a69f80011205ba3194049bcafd681d < 4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0 |
| Linux · Linux | affected 5.4 ; unaffected 0 < 5.4 ; unaffected 5.10.210 ≤ 5.10.* ; unaffected 5.15.149 ≤ 5.15.* ; unaffected 6.1.79 ≤ 6.1.* ; unaffected 6.6.18 ≤ 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 |