NetSight
IP …
medium5.5

CVE-2022-49890

In the Linux kernel, the following vulnerability has been resolved: capabilities: fix potential memleak on error path from vfs_getxattr_alloc() In cap_inode_ge…

Impact

In the Linux kernel, the following vulnerability has been resolved: capabilities: fix potential memleak on error path from vfs_getxattr_alloc() In cap_inode_getsecurity(), we will use vfs_getxattr_alloc() to complete the memory allocation of tmpbuf, if we have completed the memory allocation of tmpbuf, but failed to call handler->get(...), there will be a memleak in below logic: |-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...) | /* ^^^ alloc for tmpbuf */ |-- value = krealloc(*xattr_value, error + 1, flags) | /* ^^^ alloc memory */ |-- error = handler->get(handler, ...) | /* error! */ |-- *xattr_value = value | /* xattr_value is &tmpbuf (memory leak!) */ So we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it. [PM: subject line and backtrace tweaks]

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.14 before 4.14.299
from 4.15 before 4.19.265
from 4.20 before 5.4.224
from 5.5 before 5.10.154
from 5.11 before 5.15.78
from 5.16 before 6.0.8

Weakness classification

CWE-401

References