Yüksek CVSS 7.8
CVE-2026-31786: Linux Kernel: sınır dışı yazma
Açıklama (NVD)
In the Linux kernel, the following vulnerability has been resolved: Buffer overflow in drivers/xen/sys-hypervisor.c The build id returned by HYPERVISOR_xen_version(XENVER_build_id) is neither NUL terminated nor a string. The first causes a buffer overflow as sprintf in buildid_show will read and copy till it finds a NUL. 00000000 f4 91 51 f4 dd 38 9e 9d 65 47 52 eb 10 71 db 50 |..Q..8..eGR..q.P| 00000010 b9 a8 01 42 6f 2e 32 |...Bo.2| 00000017 So use a memcpy instead of sprintf to have the correct value: 00000000 f4 91 51 f4 dd 00 9e 9d 65 47 52 eb 10 71 db 50 |..Q.....eGR..q.P| 00000010 b9 a8 01 42 |...B| 00000014 (the above have a hack to embed a zero inside and check it's returned correctly). This is XSA-485 / CVE-2026-31786
Özet bilgiler
- Ürün
- Linux Linux Kernel
- CVSS v3.1
- 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- %0,20 (yüzdelik 9)
- CWE
- CWE-787
- Yama
- Mevcut
Etkilenen sürümler
| Ürün | Başlangıç | Bitiş | Düzeltildi |
|---|---|---|---|
| linux-linux-kernel | 4.13 | — | 5.10.254 |
| linux-linux-kernel | 5.11 | — | 5.15.204 |
| linux-linux-kernel | 5.16 | — | 6.1.170 |
| linux-linux-kernel | 6.2 | — | 6.6.137 |
| linux-linux-kernel | 6.7 | — | 6.12.85 |
| linux-linux-kernel | 6.13 | — | 6.18.26 |
| linux-linux-kernel | 6.19 | — | 7.0.3 |
| linux-linux-kernel | 7.1 | 7.1 | — |
| linux-linux-kernel | 7.1 | 7.1 | — |