Answer in brief
CVE-2024-40900 records a Unknown severity vulnerability in cachefiles: remove requests from xarray during flushing requests. 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 | >=c8383054506c77b814489c09877b5db83fd4abf2 <9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7 || >=c8383054506c77b814489c09877b5db83fd4abf2 <50d0e55356ba5b84ffb51c42704126124257e598 || >=c8383054506c77b814489c09877b5db83fd4abf2 <37e19cf86a520d65de1de9cb330415c332a40d19 || >=c8383054506c77b814489c09877b5db83fd4abf2 <0fc75c5940fa634d84e64c93bfc388e1274ed013 | 9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7, 50d0e55356ba5b84ffb51c42704126124257e598, 37e19cf86a520d65de1de9cb330415c332a40d19, 0fc75c5940fa634d84e64c93bfc388e1274ed013 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 12, 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: cachefiles: remove requests from xarray during flushing requests Even with CACHEFILES_DEAD set, we can still read the requests, so in the following concurrency the request may be used after it has been freed: mount | daemon_thread1 | daemon_thread2 ------------------------------------------------------------ cachefiles_ondemand_init_object cachefiles_ondemand_send_req REQ_A = kzalloc(sizeof(*req) + data_len) wait_for_completion(&REQ_A->done) cachefiles_daemon_read cachefiles_ondemand_daemon_read // close dev fd cachefiles_flush_reqs complete(&REQ_A->done) kfree(REQ_A) xa_lock(&cache->reqs); cachefiles_ondemand_select_req req->msg.opcode != CACHEFILES_OP_READ // req use-after-free !!! xa_unlock(&cache->reqs); xa_destroy(&cache->reqs) Hence remove requests from cache->reqs when flushing them to avoid accessing freed requests.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2024-40900 records a Unknown severity vulnerability in cachefiles: remove requests from xarray during flushing requests. 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 | >=c8383054506c77b814489c09877b5db83fd4abf2 <9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7 || >=c8383054506c77b814489c09877b5db83fd4abf2 <50d0e55356ba5b84ffb51c42704126124257e598 || >=c8383054506c77b814489c09877b5db83fd4abf2 <37e19cf86a520d65de1de9cb330415c332a40d19 || >=c8383054506c77b814489c09877b5db83fd4abf2 <0fc75c5940fa634d84e64c93bfc388e1274ed013 | 9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7, 50d0e55356ba5b84ffb51c42704126124257e598, 37e19cf86a520d65de1de9cb330415c332a40d19, 0fc75c5940fa634d84e64c93bfc388e1274ed013 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 12, 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: cachefiles: remove requests from xarray during flushing requests Even with CACHEFILES_DEAD set, we can still read the requests, so in the following concurrency the request may be used after it has been freed: mount | daemon_thread1 | daemon_thread2 ------------------------------------------------------------ cachefiles_ondemand_init_object cachefiles_ondemand_send_req REQ_A = kzalloc(sizeof(*req) + data_len) wait_for_completion(&REQ_A->done) cachefiles_daemon_read cachefiles_ondemand_daemon_read // close dev fd cachefiles_flush_reqs complete(&REQ_A->done) kfree(REQ_A) xa_lock(&cache->reqs); cachefiles_ondemand_select_req req->msg.opcode != CACHEFILES_OP_READ // req use-after-free !!! xa_unlock(&cache->reqs); xa_destroy(&cache->reqs) Hence remove requests from cache->reqs when flushing them to avoid accessing freed requests.
Quoted source text, attributed separately from HOL analysis.