CVE-2024-42315
exfat: fix potential deadlock on __exfat_get_dentry_set
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
exfat: fix potential deadlock on __exfat_get_dentry_set
When accessing a file with more entries than ES_MAX_ENTRY_NUM, the bh-array
is allocated in __exfat_get_entry_set. The problem is that the bh-array is
allocated with GFP_KERNEL. It does not make sense. In the following cases,
a deadlock for sbi->s_lock between the two processes may occur.
CPU0 CPU1
---- ----
kswapd
balance_pgdat
lock(fs_reclaim)
exfat_iterate
lock(&sbi->s_lock)
exfat_readdir
exfat_get_uniname_from_ext_entry
exfat_get_dentry_set
__exfat_get_dentry_set
kmalloc_array
...
lock(fs_reclaim)
...
evict
exfat_evict_inode
lock(&sbi->s_lock)
To fix this, let's allocate bh-array with GFP_NOFS.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-07-30 CVE Reserved
- 2024-08-17 CVE Published
- 2024-08-23 EPSS Updated
- 2024-09-15 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/a3ff29a95fde16906304455aa8c0bd84eb770258 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/bd3bdb9e0d656f760b11d0c638d35d7f7068144d | Vuln. Introduced | |
| https://git.kernel.org/stable/c/92dcd7d6c6068bf4fd35a6f64d606e27d634807e | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.2 < 6.6.44 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.6.44" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.2 < 6.10.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.10.3" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.2 < 6.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.2 < 6.11" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.10.190 Search vendor "Linux" for product "Linux Kernel" and version "5.10.190" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.15.150 Search vendor "Linux" for product "Linux Kernel" and version "5.15.150" | en |
Affected
| ||||||