Answer in brief
CVE-2024-40900 records a High severity (CVSS 7.8) 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.
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 | >=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.