vulnerability
Ubuntu: (CVE-2021-47295): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | May 21, 2024 | Nov 19, 2024 | Jun 26, 2025 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
May 21, 2024
Added
Nov 19, 2024
Modified
Jun 26, 2025
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.
Solution(s)
no-fix-ubuntu-packageubuntu-upgrade-linuxubuntu-upgrade-linux-awsubuntu-upgrade-linux-aws-5-4ubuntu-upgrade-linux-aws-fipsubuntu-upgrade-linux-azureubuntu-upgrade-linux-azure-5-4ubuntu-upgrade-linux-azure-fipsubuntu-upgrade-linux-bluefieldubuntu-upgrade-linux-fipsubuntu-upgrade-linux-gcpubuntu-upgrade-linux-gcp-5-4ubuntu-upgrade-linux-gcp-fipsubuntu-upgrade-linux-gkeopubuntu-upgrade-linux-hwe-5-4ubuntu-upgrade-linux-ibmubuntu-upgrade-linux-kvmubuntu-upgrade-linux-oracleubuntu-upgrade-linux-oracle-5-4ubuntu-upgrade-linux-raspiubuntu-upgrade-linux-raspi-5-4
References
- CVE-2021-47295
- https://attackerkb.com/topics/CVE-2021-47295
- URL-https://git.kernel.org/linus/f5051bcece50140abd1a11a2d36dc3ec5484fc32
- URL-https://git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62
- URL-https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b
- URL-https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1
- URL-https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32
- URL-https://www.cve.org/CVERecord?id=CVE-2021-47295
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