CVE-2021-47295
High
Description
In the Linux kernel, the following vulnerability has been resolved: net: sched: fix memory leak in tcindex_partial_destroy_work Syzbot reported memory leak in tcindex_set_parms(). The problem was in non-freed perfect hash in tcindex_partial_destroy_work(). In tcindex_set_parms() new tcindex_data is allocated and some fields from old one are copied to new one, but not the perfect hash. Since tcindex_partial_destroy_work() is the destroy function for old tcindex_data, we need to free perfect hash to avoid memory leak.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux Kernel
PublishedMay 21, 2024
First seenMay 21, 2024
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- linux linux_kernel5.4.136, 5.10.54, 5.13.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.18 ≤ v < 5.4.136, 5.5 ≤ v < 5.10.54, 5.11 ≤ v < 5.13.6, 5.14 | 5.4.136, 5.10.54, 5.13.6 |
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