Tracker / CVE-2024-48881
CVE-2024-48881
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") leads a NULL pointer deference in cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >From the above code in cache_set_flush(), if previous registration code fails before allocating c->root, it is possible c->root is NULL as what it is initialized. __bch_btree_node_alloc() never returns NULL but c->root is possible to be NULL at above line 1721. This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.19.291 → 4.20 |
| linux | linux_kernel · 5.10.188 → 5.10.231 |
| linux | linux_kernel · 5.15.121 → 5.15.174 |
| linux | linux_kernel · 5.4.251 → 5.4.287 |
| linux | linux_kernel · 6.1.39 → 6.1.120 |
| linux | linux_kernel · 6.4.4 → 6.6.66 |
| linux | linux_kernel · 6.7 → 6.12.5 |
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.