Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before replacing page cache folio fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path. This means fuse_chan_abort() can end the request and free the fuse_io_args (eg fuse_readpages_end()) while the subsequent copy chain logic after fuse_try_move_folio() accesses the fuse_io_args, leading to use-after-free issues. Fix this by calling lock_request() before replace_page_cache_folio(). This ensures the request is locked on the success path which will prevent the fuse_io_args from being freed while the later copying logic runs, and also ensures that the ap->folios[i]->mapping is never null since ap->folios[i] will always point to the newfolio after replace_page_cache_folio().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before 7c18691e0cfda29672f79bafde8abdb7710674f6; affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before 5927b43a4f8d89e86930f524bf63e9c7e66f61b4; affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before 030fe3e9d8abdee303dd7e9e42f45082d382a407; affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before 46473ddccdc5065033e397d6e62c280dbcd3d9c2; affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before af2892249d982a1c036ca456cc135374e68b6677; affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before 0223f452532d9cd8a5e87c45de828fd93c99bd25; affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before e28db6ac4792d065ab32565fd9f0a2361c3d4666; affected ce534fb052928ce556639d7ecf01cbf4e01321e1 before a078484921052d0badd827fcc2770b5cfc1d4120 |
| Linux / Linux | affected 2.6.35; unaffected 0 before 2.6.35; unaffected 5.15.211 through 5.15.*; unaffected 6.1.177 through 6.1.*; unaffected 6.6.144 through 6.6.*; unaffected 6.12.95 through 6.12.*; unaffected 6.18.37 through 6.18.*; unaffected 7.0.14 through 7.0.*; unaffected 7.1.2 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6
- https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4
- https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407
- https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2
- https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677
- https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25
- https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666
- https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120
ADP enrichment
No English description supplied.
No references supplied.