Updated: 2024-11-04 13:42:59.209934
Description:
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid use-after-free in ext4_ext_show_leaf() In ext4_find_extent(), path may be freed by error or be reallocated, so using a previously saved *ppath may have been freed and thus may trigger use-after-free, as follows: ext4_split_extent path = *ppath; ext4_split_extent_at(ppath) path = ext4_find_extent(ppath) ext4_split_extent_at(ppath) // ext4_find_extent fails to free path // but zeroout succeeds ext4_ext_show_leaf(inode, path) eh = path[depth].p_hdr // path use-after-free !!! Similar to ext4_split_extent_at(), we use *ppath directly as an input to ext4_ext_show_leaf(). Fix a spelling error by the way. Same problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only used in ext4_ext_show_leaf(), remove 'path' and use *ppath directly. This issue is triggered only when EXT_DEBUG is defined and therefore does not affect functionality.
Links | NIST | CIRCL | RHEL | Ubuntu |
Severity | Score | |
---|---|---|
CVSS Version 2.x | 0 | |
CVSS Version 3.x | HIGH | 7.8 |
OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
---|---|---|---|---|---|---|---|---|
AlmaLinux 9.2 ESU | kernel | 5.14.0 | 7.8 | HIGH | Released | CLSA-2024:1731933167 | 2024-11-18 16:33:03 | |
AlmaLinux 9.2 FIPS | kernel | 5.14.0 | 7.8 | HIGH | Released | CLSA-2024:1731956568 | 2024-11-18 16:33:04 | |
CentOS 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2024-11-27 11:59:17 | ||
CentOS 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Released | CLSA-2024:1731348593 | 2024-11-26 12:01:17 | |
CentOS 8.4 ELS | kernel | 4.18.0 | 7.8 | HIGH | In Testing | CLSA-2024:1731430561 | 2024-11-13 12:24:45 | |
CentOS 8.5 ELS | kernel | 4.18.0 | 7.8 | HIGH | Released | CLSA-2024:1731431059 | 2024-11-12 13:32:31 | |
CentOS Stream 8 ELS | kernel | 4.18.0 | 7.8 | HIGH | Released | CLSA-2024:1731431756 | 2024-11-12 13:32:29 | |
CloudLinux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2024-11-27 11:59:17 | ||
CloudLinux 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Not Vulnerable | 2024-11-27 11:59:15 | ||
Oracle Linux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2024-11-27 11:59:15 |