CVE-2024-49854
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)
block, bfq: fix uaf for accessing waker_bfqq after splitting
In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for accessing waker_bfqq after splitting After commit 42c306ed7233 ("block, bfq: don't break merge chain in bfq_split_bfqq()"), if the current procress is the last holder of bfqq, the bfqq can be freed after bfq_split_bfqq(). Hence recored the bfqq and then access bfqq->waker_bfqq may trigger UAF. What's more, the waker_bfqq may in the merge chain of bfqq, hence just recored waker_bfqq is still not safe. Fix the problem by adding a helper bfq_waker_bfqq() to check if bfqq->waker_bfqq is in the merge chain, and current procress is the only holder.
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) |
|---|---|---|---|---|---|
| e0c20d88b7dce85d2703bb6ba77bf359959675cd | affected | git | 63a07379fdb6c72450cb05294461c6016b8b7726 | Unavailable | None listed |
| de6c5e3a456019d2182e345730e59721714fa0b5 | affected | git | de0456460f2abf921e356ed2bd8da87a376680bd | Unavailable | None listed |
| 19f3bec2ac4be329b9bd12b18a989b867618d2d8 | affected | git | 0780451f03bf518bc032a7c584de8f92e2d39d7f | Unavailable | None listed |
| 13b3d0e8cb121f99b11918a0d4bcc1ce4647d352 | affected | git | 0b8bda0ff17156cd3f60944527c9d8c9f99f1583 | Unavailable | None listed |
| 4780f50ea50cfe8e89fc3747bf3dd155488433bb | affected | git | cae58d19121a70329cf971359e2518c93fec04fe | Unavailable | None listed |
| 42c306ed723321af4003b2a41bb73728cab54f85 | affected | git | 1ba0403ac6447f2d63914fb760c44a3b19c44eaf | Unavailable | None listed |
| 9e813033594b141f61ff0ef0cfaaef292564b041 | affected | git | Unavailable | Unavailable | None listed |
| 3a5f45a4ad4e1fd36b0a998eef03d76a4f02a2a8 | affected | git | Unavailable | Unavailable | None listed |
| 3630a18846c7853aa326d3b42fd0a855af7b41bc | affected | git | Unavailable | Unavailable | None listed |
| 4.19.323 | affected | semver | 4.20 | Unavailable | None listed |
| 5.4.285 | affected | semver | 5.5 | Unavailable | None listed |
| 5.10.227 | affected | semver | 5.11 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
No explicit version tuples; consult this entry's default status.