Tracker / CVE-2021-47353
CVE-2021-47353
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: udf: Fix NULL pointer dereference in udf_symlink function In function udf_symlink, epos.bh is assigned with the value returned by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c and returns the value of sb_getblk function that could be NULL. Then, epos.bh is used without any check, causing a possible NULL pointer dereference when sb_getblk fails. This fix adds a check to validate the value of epos.bh.
Affected products and versions
| linux | linux_kernel · … → 4.4.276 |
|---|---|
| linux | linux_kernel · 4.10 → 4.14.240 |
| linux | linux_kernel · 4.15 → 4.19.198 |
| linux | linux_kernel · 4.20 → 5.4.133 |
| linux | linux_kernel · 4.5 → 4.9.276 |
| linux | linux_kernel · 5.11 → 5.12.18 |
| linux | linux_kernel · 5.13 → 5.13.3 |
| linux | linux_kernel · 5.5 → 5.10.51 |
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.