Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: avoid double fput() on failed usercopy If the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF ioctl(), we shouldn't assume that 'buf->dmabuf' is still valid. In fact, dma_buf_fd() called fd_install() before, i.e. "consumed" one reference, leaving us with none. Calling dma_buf_put() will therefore put a reference we no longer own, leading to a valid file descritor table entry for an already released 'file' object which is a straight use-after-free. Simply avoid calling dma_buf_put() and rely on the process exit code to do the necessary cleanup, if needed, i.e. if the file descriptor is still valid.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6cffd79504ce040f460831030d3069fa1c99bb71 before 4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215; affected 6cffd79504ce040f460831030d3069fa1c99bb71 before a5ce7ee5fcc07583159f54ab4af5164de00148f5; affected 6cffd79504ce040f460831030d3069fa1c99bb71 before e4382d0a39f9a1e260d62fdc079ddae5293c037d; affected 6cffd79504ce040f460831030d3069fa1c99bb71 before 76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc; affected 6cffd79504ce040f460831030d3069fa1c99bb71 before 46963e2e0629cb31c96b1d47ddd89dc3d8990b34 |
| Linux / Linux | affected 5.1; unaffected 0 before 5.1; unaffected 5.4.180 through 5.4.*; unaffected 5.10.101 through 5.10.*; unaffected 5.15.24 through 5.15.*; unaffected 5.16.10 through 5.16.*; unaffected 5.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215
- https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5
- https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d
- https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc
- https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215
- https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5
- https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d
- https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc
- https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34
No English description supplied.
No references supplied.