CVE-2021-47353
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMay 21, 2024
First seenMay 21, 2024
How to fix
Update
- linux linux_kernel4.4.276, 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 4.4.276, 4.5 ≤ v < 4.9.276, 4.10 ≤ v < 4.14.240, 4.15 ≤ v < 4.19.198, 4.20 ≤ v < 5.4.133, 5.5 ≤ v < 5.10.51, 5.11 ≤ v < 5.12.18, 5.13 ≤ v < 5.13.3 | 4.4.276, 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3 |
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