CVE-2024-56549
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2024
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
cachefiles: Fix NULL pointer dereference in object->file
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| c8383054506c77b814489c09877b5db83fd4abf2 | affected | git | d6bba3ece960129a553d4b16f1b00c884dc0993a | Unavailable | None listed |
| c8383054506c77b814489c09877b5db83fd4abf2 | affected | git | 785408bbafcfa24c9fc5b251f03fd0780ce182bd | Unavailable | None listed |
| c8383054506c77b814489c09877b5db83fd4abf2 | affected | git | f98770440c9bc468e2fd878212ec9526dbe08293 | Unavailable | None listed |
| c8383054506c77b814489c09877b5db83fd4abf2 | affected | git | 9582c7664103c9043e80a78f5c382aa6bdd67418 | Unavailable | None listed |
| c8383054506c77b814489c09877b5db83fd4abf2 | affected | git | 31ad74b20227ce6b40910ff78b1c604e42975cf1 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.19 | Unavailable | None listed |
| 6.1.129 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.78 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.11.11 | unaffected | semver | Unavailable | 6.11.* | None listed |
| 6.12.2 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |