In the Linux kernel, the following vulnerability has been resolved:
regmap: Fix possible double-free in regcache_rbtree_exit()
In regcache_rbtree_insert_to_block(), when 'present' realloc failed,
the 'blk' which is supposed to assign to 'rbnode->block' will be freed,
so 'rbnode->block' points a freed memory, in the error handling path of
regcache_rbtree_init(), 'rbnode->block' will be freed again in
regcache_rbtree_exit(), KASAN will report double-free as follows:
BUG: KASAN: double-free or invalid-free in kfree+0xce/0x390
Call Trace:
slab_free_freelist_hook+0x10d/0x240
kfree+0xce/0x390
regcache_rbtree_exit+0x15d/0x1a0
regcache_rbtree_init+0x224/0x2c0
regcache_init+0x88d/0x1310
__regmap_init+0x3151/0x4a80
__devm_regmap_init+0x7d/0x100
madera_spi_probe+0x10f/0x333 [madera_spi]
spi_probe+0x183/0x210
really_probe+0x285/0xc30
To fix this, moving up the assignment of rbnode->block to immediately after
the reallocation has succeeded so that the data structure stays valid even
if the second reallocation fails.
References
Configurations
Configuration 1 (hide)
|
History
06 Jan 2025, 19:52
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CPE | cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-415 | |
| References | () https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596f - Patch | |
| References | () https://git.kernel.org/stable/c/36e911a16b377bde0ad91a8c679069d0d310b1a6 - Patch | |
| References | () https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d61091 - Patch | |
| References | () https://git.kernel.org/stable/c/50cc1462a668dc62949a1127388bc3af785ce047 - Patch | |
| References | () https://git.kernel.org/stable/c/55e6d8037805b3400096d621091dfbf713f97e83 - Patch | |
| References | () https://git.kernel.org/stable/c/758ced2c3878ff789801e6fee808e185c5cf08d6 - Patch | |
| References | () https://git.kernel.org/stable/c/e72dce9afbdbfa70d9b44f5908a50ff6c4858999 - Patch | |
| References | () https://git.kernel.org/stable/c/fc081477b47dfc3a6cb50a96087fc29674013fc2 - Patch |
Information
Published : 2024-05-22 09:15
Updated : 2025-01-06 19:52
NVD link : CVE-2021-47483
Mitre link : CVE-2021-47483
CVE.ORG link : CVE-2021-47483
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-415
Double Free