Answer in brief
CVE-2024-56549 records a High severity (CVSS 7.8) vulnerability in cachefiles: Fix NULL pointer dereference in object->file. 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 <d6bba3ece960129a553d4b16f1b00c884dc0993a || >=c8383054506c77b814489c09877b5db83fd4abf2 <785408bbafcfa24c9fc5b251f03fd0780ce182bd || >=c8383054506c77b814489c09877b5db83fd4abf2 <f98770440c9bc468e2fd878212ec9526dbe08293 || >=c8383054506c77b814489c09877b5db83fd4abf2 <9582c7664103c9043e80a78f5c382aa6bdd67418 || >=c8383054506c77b814489c09877b5db83fd4abf2 <31ad74b20227ce6b40910ff78b1c604e42975cf1 | d6bba3ece960129a553d4b16f1b00c884dc0993a, 785408bbafcfa24c9fc5b251f03fd0780ce182bd, f98770440c9bc468e2fd878212ec9526dbe08293, 9582c7664103c9043e80a78f5c382aa6bdd67418, 31ad74b20227ce6b40910ff78b1c604e42975cf1 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Dec 27, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix NULL pointer dereference in object->file At present, the object->file has the NULL pointer dereference problem in ondemand-mode. The root cause is that the allocated fd and object->file lifetime are inconsistent, and the user-space invocation to anon_fd uses object->file. Following is the process that triggers the issue: [write fd] [umount] cachefiles_ondemand_fd_write_iter fscache_cookie_state_machine cachefiles_withdraw_cookie if (!file) return -ENOBUFS cachefiles_clean_up_object cachefiles_unmark_inode_in_use fput(object->file) object->file = NULL // file NULL pointer dereference! __cachefiles_write(..., file, ...) Fix this issue by add an additional reference count to the object->file before write/llseek, and decrement after it finished.
Quoted source text, attributed separately from HOL analysis.