Yüksek CVSS 8.2
CVE-2026-46303: Linux Kernel: güvenlik açığı
Açıklama (NVD)
In the Linux kernel, the following vulnerability has been resolved: isofs: validate Rock Ridge CE continuation extent against volume size rock_continue() reads rs->cont_extent verbatim from the Rock Ridge CE record and passes it to sb_bread() without checking that the block number is within the mounted ISO 9660 volume. commit e595447e177b ("[PATCH] rock.c: handle corrupted directories") added cont_offset and cont_size rejection for the CE continuation but did not validate the extent block number itself. commit f54e18f1b831 ("isofs: Fix infinite looping over CE entries") later capped the CE chain length at RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked. With a crafted ISO mounted via udisks2 (desktop optical auto-mount) or via CAP_SYS_ADMIN mount, rs->cont_extent can therefore point at an out-of-range block or at blocks belonging to an adjacent filesystem on the same block device. sb_bread() on an out-of-range block returns NULL cleanly via the block layer EIO path, so there is no memory-safety violation. For in-range reads of adjacent- filesystem data, the CE buffer is parsed as Rock Ridge records and only the text of SL sub-records reaches userspace through readlink(), which makes the info-leak channel narrow and difficult to exploit; still, rejecting the malformed CE outright matches the rejection shape already present in the same function for cont_offset and cont_size. Add an ISOFS_SB(sb)->s_nzones bounds check to rock_continue() next to the existing offset/size rejection, printing the same corrupted-directory-entry notice.
Özet bilgiler
- Ürün
- Linux Linux Kernel
- CVSS v3.1
- 8.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N - EPSS
- %0,32 (yüzdelik 25)
- CWE
- CWE-401
- Yama
- Mevcut
Etkilenen sürümler
| Ürün | Başlangıç | Bitiş | Düzeltildi |
|---|---|---|---|
| linux-linux-kernel | 2.6.32.66 | — | 2.6.33 |
| linux-linux-kernel | 3.2.67 | — | 3.3 |
| linux-linux-kernel | 3.4.107 | — | 3.5 |
| linux-linux-kernel | 3.10.64 | — | 3.11 |
| linux-linux-kernel | 3.12.36 | — | 3.13 |
| linux-linux-kernel | 3.14.28 | — | 3.15 |
| linux-linux-kernel | 3.17.8 | — | 3.18 |
| linux-linux-kernel | 3.18.2 | — | 5.10.258 |
| linux-linux-kernel | 5.11 | — | 5.15.209 |
| linux-linux-kernel | 5.16 | — | 6.1.175 |
| linux-linux-kernel | 6.2 | — | 6.6.140 |
| linux-linux-kernel | 6.7 | — | 6.12.88 |
| linux-linux-kernel | 6.13 | — | 6.18.30 |
| linux-linux-kernel | 6.19 | — | 7.0.7 |
| linux-linux-kernel | 7.1 | 7.1 | — |