Answer in brief
CVE-2021-46998 records a High severity (CVSS 7.8) vulnerability in ethernet:enic: Fix a use after free bug in enic_hard_start_xmit. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <25a87b1f566b5eb2af2857a928f0e2310d900976 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <f7f6f07774091a6ddd98500b85386c3c6afb30d3 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <7afdd6aba95c8a526038e7abe283eeac3e4320f1 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <6892396ebf04ea2c021d80e10f4075e014cd7cc3 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <d90529392aaf498dafa95d212295d64b2cea4e24 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <643001b47adc844ae33510c4bb93c236667008a3 | 25a87b1f566b5eb2af2857a928f0e2310d900976, f7f6f07774091a6ddd98500b85386c3c6afb30d3, 7afdd6aba95c8a526038e7abe283eeac3e4320f1, 6892396ebf04ea2c021d80e10f4075e014cd7cc3, d90529392aaf498dafa95d212295d64b2cea4e24, 643001b47adc844ae33510c4bb93c236667008a3 |
| Linux/Linuxgeneric | 4.16 | Not reported |
Published upstream
Feb 28, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-46998 records a High severity (CVSS 7.8) vulnerability in ethernet:enic: Fix a use after free bug in enic_hard_start_xmit. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <25a87b1f566b5eb2af2857a928f0e2310d900976 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <f7f6f07774091a6ddd98500b85386c3c6afb30d3 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <7afdd6aba95c8a526038e7abe283eeac3e4320f1 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <6892396ebf04ea2c021d80e10f4075e014cd7cc3 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <d90529392aaf498dafa95d212295d64b2cea4e24 || >=fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3 <643001b47adc844ae33510c4bb93c236667008a3 | 25a87b1f566b5eb2af2857a928f0e2310d900976, f7f6f07774091a6ddd98500b85386c3c6afb30d3, 7afdd6aba95c8a526038e7abe283eeac3e4320f1, 6892396ebf04ea2c021d80e10f4075e014cd7cc3, d90529392aaf498dafa95d212295d64b2cea4e24, 643001b47adc844ae33510c4bb93c236667008a3 |
| Linux/Linuxgeneric | 4.16 | Not reported |
Published upstream
Feb 28, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.
Quoted source text, attributed separately from HOL analysis.