Answer in brief
CVE-2024-49936 records a High severity (CVSS 8.8) vulnerability in net/xen-netback: prevent UAF in xenvif_flush_hash(). 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 8.8. 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 | >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <3c4423b0c4b98213b3438e15061e1d08220e6982 || >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c || >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <a0465723b8581cad27164c9073fd780904cd22d4 || >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <efcff6ce7467f01f0753609f420333f3f2ceceda || >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <143edf098b80669d05245b2f2367dd156a83a2c5 || >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <d408889d4b54f5501e4becc4dbbb9065143fbf4e || >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <54d8639af5568fc41c0e274fc3ec9cf86c59fcbb || >=40d8abdee806d496a60ee607a6d01b1cd7fabaf0 <0fa5e94a1811d68fbffa0725efe6d4ca62c03d12 | 3c4423b0c4b98213b3438e15061e1d08220e6982, a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c, a0465723b8581cad27164c9073fd780904cd22d4, efcff6ce7467f01f0753609f420333f3f2ceceda, 143edf098b80669d05245b2f2367dd156a83a2c5, d408889d4b54f5501e4becc4dbbb9065143fbf4e, 54d8639af5568fc41c0e274fc3ec9cf86c59fcbb, 0fa5e94a1811d68fbffa0725efe6d4ca62c03d12 |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
Oct 21, 2024
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/xen-netback: prevent UAF in xenvif_flush_hash() During the list_for_each_entry_rcu iteration call of xenvif_flush_hash, kfree_rcu does not exist inside the rcu read critical section, so if kfree_rcu is called when the rcu grace period ends during the iteration, UAF occurs when accessing head->next after the entry becomes free. Therefore, to solve this, you need to change it to list_for_each_entry_safe.
Quoted source text, attributed separately from HOL analysis.