In the Linux kernel, the following vulnerability has been resolved:
exfat: fix random stack corruption after get_block
When get_block is called with a buffer_head allocated on the stack, such
as do_mpage_readpage, stack corruption due to buffer_head UAF may occur in
the following race condition situation.
<CPU 0> <CPU 1>
mpage_read_folio
<<bh on stack>>
do_mpage_readpage
exfat_get_block
bh_read
__bh_read
get_bh(bh)
submit_bh
wait_on_buffer
...
end_buffer_read_sync
__end_buffer_read_notouch
unlock_buffer
<<keep going>>
...
...
...
...
<<bh is not valid out of mpage_read_folio>>
.
.
another_function
<<variable A on stack>>
put_bh(bh)
atomic_dec(bh->b_count)
* stack corruption here *
This patch returns -EAGAIN if a folio does not have buffers when bh_read
needs to be called. By doing this, the caller can fallback to functions
like block_read_full_folio(), create a buffer_head in the folio, and then
call get_block again.
Let's do not call bh_read() with on-stack buffer_head.
References
Configurations
Configuration 1 (hide)
|
History
29 Apr 2025, 18:58
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.0 |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-362 CWE-416 |
|
| Summary |
|
|
| References | () https://git.kernel.org/stable/c/1bb7ff4204b6d4927e982cd256286c09ed4fd8ca - Patch | |
| References | () https://git.kernel.org/stable/c/49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2 - Patch | |
| References | () https://git.kernel.org/stable/c/f7447286363dc1e410bf30b87d75168f3519f9cc - Patch | |
| References | () https://git.kernel.org/stable/c/f807a6bf2005740fa26b4f59c4a003dc966b9afd - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
16 Apr 2025, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-04-16 15:15
Updated : 2025-04-29 18:58
NVD link : CVE-2025-22036
Mitre link : CVE-2025-22036
CVE.ORG link : CVE-2025-22036
JSON object : View
Products Affected
linux
- linux_kernel