Answer in brief
CVE-2022-49921 records a Unknown severity 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.
Answer in brief
CVE-2022-49921 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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.
A CVSS score is not reported in the current record. 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.