CVE-2022-49921
Linux Kernel Net Scheduler Use After Free Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: net: sched: Fix use after free in red_enqueue() We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue").
INFO
Published Date :
May 1, 2025, 3:16 p.m.
Last Modified :
May 7, 2025, 1:27 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-49921.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2022-49921 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49921 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
May. 07, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.154 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.78 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.0.8 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.4.163 up to (excluding) 4.5 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.7 up to (excluding) 4.9.333 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.299 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.265 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.224 Added Reference Type kernel.org: https://git.kernel.org/stable/c/170e5317042c302777ed6d59fdb84af9b0219d4e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/52e0429471976785c155bfbf51d80990c6cd46e2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5960b9081baca85cc7dcb14aec1de85999ea9d36 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/795afe0b9bb6c915f0299a8e309936519be01619 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a238cdcf2bdc72207c74375fc8be13ee549ca9db Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e877f8fa49fbccc63cb2df2e9179bddc695b825a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fc4b50adb400ee5ec527a04073174e8e73a139fa Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 01, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: net: sched: Fix use after free in red_enqueue() We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue"). Added Reference https://git.kernel.org/stable/c/170e5317042c302777ed6d59fdb84af9b0219d4e Added Reference https://git.kernel.org/stable/c/52e0429471976785c155bfbf51d80990c6cd46e2 Added Reference https://git.kernel.org/stable/c/5960b9081baca85cc7dcb14aec1de85999ea9d36 Added Reference https://git.kernel.org/stable/c/795afe0b9bb6c915f0299a8e309936519be01619 Added Reference https://git.kernel.org/stable/c/8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9 Added Reference https://git.kernel.org/stable/c/a238cdcf2bdc72207c74375fc8be13ee549ca9db Added Reference https://git.kernel.org/stable/c/e877f8fa49fbccc63cb2df2e9179bddc695b825a Added Reference https://git.kernel.org/stable/c/fc4b50adb400ee5ec527a04073174e8e73a139fa
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49921 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-49921
weaknesses.