CVE-2021-47295 net: sched: fix memory leak in tcindex_partial_destroy_work

2024-05-2114:35:18

Linux

github.com

cve-2021-47295

linux kernel

memory leak

AI Score

6.8

Confidence

Low

EPSS

Percentile

15.5%

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

JSON

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.

ADP Affected

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    "product": "linux_kernel",
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        "status": "affected",
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        "versionType": "custom"
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    "defaultStatus": "unknown"
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        "version": "5.10.54",
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]