IT

Tracker / CVE-2022-49890

CVE-2022-49890

Medium 5.5

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 and versions

linux linux_kernel
linux linux_kernel · 4.14 → 4.14.299
linux linux_kernel · 4.15 → 4.19.265
linux linux_kernel · 4.20 → 5.4.224
linux linux_kernel · 5.11 → 5.15.78
linux linux_kernel · 5.16 → 6.0.8
linux linux_kernel · 5.5 → 5.10.154

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References