In the Linux kernel, the following vulnerability has been resolved: ext4: validate p_idx bounds in ext4_ext_correct_indexes ext4_ext_correct_indexes() walks up the extent tree correcting index entries when the first extent in a leaf is modified. Before accessing path[k].p_idx->ei_block, there is no validation that p_idx falls within the valid range of index entries for that level. If the on-disk extent header contains a corrupted or crafted eh_entries value, p_idx can point past the end of the allocated buffer, causing a slab-out-of-bounds read. Fix this by validating path[k].p_idx against EXT_LAST_INDEX() at both access sites: before the while loop and inside it. Return -EFSCORRUPTED if the index pointer is out of range, consistent with how other bounds violations are handled in the ext4 extent tree code.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | NONE |
| User Interaction | REQUIRED |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Type: Secondary
Exploitability Score: 1.8
Impact Score: 5.9
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-125
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23beaf4600> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23beaf7580> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23beaf7800> | Operating System |
| linux | linux_kernel | 2.6.19 | <built-in method update of dict object at 0x7d23af2035c0> | Operating System |
| linux | linux_kernel | 2.6.19 | <built-in method update of dict object at 0x7d23af2036c0> | Operating System |
| linux | linux_kernel | 2.6.19 | <built-in method update of dict object at 0x7d23af201480> | Operating System |
| linux | linux_kernel | 2.6.19 | <built-in method update of dict object at 0x7d23bea96900> | Operating System |
| linux | linux_kernel | 2.6.19 | <built-in method update of dict object at 0x7d23beaf7340> | Operating System |
| linux | linux_kernel | 2.6.19 | <built-in method update of dict object at 0x7d23a59c3e40> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7d23af201c80> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7d23a536d640> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7d23beaf44c0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7d24244f6680> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7d23af200800> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.19:-:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.19:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.19:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.19:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.19:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.19:rc6:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* |