usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.12.110, 6.18.52, 7.2.6
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths The error paths for endpoint-disabled (ESHUTDOWN) and request-allocation failure (ENOMEM) in ffs_dmabuf_transfer() jump to err_fence_put which calls dma_fence_put() on the fence. However, at that point the fence has only been kmalloc'd — dma_fence_init() has not been called yet, so the refcount and the fence ops are uninitialized. Calling dma_fence_put() on such an object leads to undefined behavior. Use kfree() instead, since the fence is just a plain allocation at this stage, and rename the label to err_fence_free to reflect the actual cleanup action.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 7b07a2a7ca02a20124b552be96c5a56910795488 · fixed in be539138d9a187af3b884525a395db10797c64f1; From 7b07a2a7ca02a20124b552be96c5a56910795488 · fixed in 5fd8baacc7dc477df9cac61b45491840247a9b1e; From 7b07a2a7ca02a20124b552be96c5a56910795488 · fixed in 58952c83dfe6ea3294a74734d2d1018c1120779a; From 7b07a2a7ca02a20124b552be96c5a56910795488 · fixed in 621707dc67c9846fd876d7579ec951d92aa033f1
- Linux Linux
6.9
- KernelLinux
From 6.9.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6