CVE-2022-49921 Details
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").
A use-after-free vulnerability has been identified in the Linux kernel's packet scheduling component. The issue arises in the 'red_enqueue()' function, where a socket buffer (skb) is improperly reused after being passed to 'qdisc_enqueue()'. This vulnerability affects several versions of the Linux kernel.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 1, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/170e5317042c302777ed6d59fdb84af9b0219d4e | kernel.org | Patch |
| https://git.kernel.org/stable/c/52e0429471976785c155bfbf51d80990c6cd46e2 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5960b9081baca85cc7dcb14aec1de85999ea9d36 | kernel.org | Patch |
| https://git.kernel.org/stable/c/795afe0b9bb6c915f0299a8e309936519be01619 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a238cdcf2bdc72207c74375fc8be13ee549ca9db | kernel.org | Patch |
| https://git.kernel.org/stable/c/e877f8fa49fbccc63cb2df2e9179bddc695b825a | kernel.org | Patch |
| https://git.kernel.org/stable/c/fc4b50adb400ee5ec527a04073174e8e73a139fa | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.4.163, < 4.5 >= 4.7, < 4.9.333 >= 4.10, < 4.14.299 >= 4.15, < 4.19.265 >= 4.20, < 5.4.224 >= 5.5, < 5.10.154 >= 5.11, < 5.15.78 >= 5.16, < 6.0.8 6.1 rc1 6.1 rc2 6.1 rc3 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Oct 1, 2025 | CVE Modified | CISA-ADP |
| May 7, 2025 | Initial Analysis | [email protected] |
| May 1, 2025 | New CVE Received | kernel.org |