Answer in brief
CVE-2022-49921 records a High severity (CVSS 7.8) vulnerability in net: sched: Fix use after free in red_enqueue(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <795afe0b9bb6c915f0299a8e309936519be01619 || >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <a238cdcf2bdc72207c74375fc8be13ee549ca9db || >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <e877f8fa49fbccc63cb2df2e9179bddc695b825a || >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <52e0429471976785c155bfbf51d80990c6cd46e2 || >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <5960b9081baca85cc7dcb14aec1de85999ea9d36 || >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <fc4b50adb400ee5ec527a04073174e8e73a139fa || >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <170e5317042c302777ed6d59fdb84af9b0219d4e || >=d7f4f332f082c4d4ba53582f902ed6b44fd6f45e <8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9 || ab0b3b9dbf559a5633d460e748144697bd2d3aa3 || >=4.4.163 <4.5 | 795afe0b9bb6c915f0299a8e309936519be01619, a238cdcf2bdc72207c74375fc8be13ee549ca9db, e877f8fa49fbccc63cb2df2e9179bddc695b825a, 52e0429471976785c155bfbf51d80990c6cd46e2, 5960b9081baca85cc7dcb14aec1de85999ea9d36, fc4b50adb400ee5ec527a04073174e8e73a139fa, 170e5317042c302777ed6d59fdb84af9b0219d4e, 8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9, 4.5 |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
May 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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").
Quoted source text, attributed separately from HOL analysis.