CVE-2022-48821
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2022
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
misc: fastrpc: avoid double fput() on failed usercopy
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.
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) |
|---|---|---|---|---|---|
| 6cffd79504ce040f460831030d3069fa1c99bb71 | affected | git | 4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215 | Unavailable | None listed |
| 6cffd79504ce040f460831030d3069fa1c99bb71 | affected | git | a5ce7ee5fcc07583159f54ab4af5164de00148f5 | Unavailable | None listed |
| 6cffd79504ce040f460831030d3069fa1c99bb71 | affected | git | e4382d0a39f9a1e260d62fdc079ddae5293c037d | Unavailable | None listed |
| 6cffd79504ce040f460831030d3069fa1c99bb71 | affected | git | 76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc | Unavailable | None listed |
| 6cffd79504ce040f460831030d3069fa1c99bb71 | affected | git | 46963e2e0629cb31c96b1d47ddd89dc3d8990b34 | 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) |
|---|---|---|---|---|---|
| 5.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.1 | Unavailable | None listed |
| 5.4.180 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.101 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.24 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.16.10 | unaffected | semver | Unavailable | 5.16.* | None listed |
| 5.17 | unaffected | original_commit_for_fix | Unavailable | * | None listed |