IT

Tracker / CVE-2022-49914

CVE-2022-49914

Medium 5.5

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix inode list leak during backref walking at resolve_indirect_refs() During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes. Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.

Affected products and versions

linux linux_kernel
linux linux_kernel · 3.5 → 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