CVE-2022-48801
iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL If we fail to copy the just created file descriptor to userland, we try to clean up by putting back 'fd' and freeing 'ib'. The code uses put_unused_fd() for the former which is wrong, as the file descriptor was already published by fd_install() which gets called internally by anon_inode_getfd(). This makes the error handling code leaving a half cleaned up file descriptor table around and a partially destructed 'file' object, allowing userland to play use-after-free tricks on us, by abusing the still usable fd and making the code operate on a dangling 'file->private_data' pointer. Instead of leaving the kernel in a partially corrupted state, don't attempt to explicitly clean up and leave this to the process exit path that'll release any still valid fds, including the one created by the previous call to anon_inode_getfd(). Simply return -EFAULT to indicate the error.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 79% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected f73f7f4da581875f9b1f2fb8ebd1ab15ed634488 – < b7f54894aa7517d2b6c797a499b9f491e9db9083
- affected f73f7f4da581875f9b1f2fb8ebd1ab15ed634488 – < 202071d2518537866d291aa7cf26af54e674f4d4
- affected f73f7f4da581875f9b1f2fb8ebd1ab15ed634488 – < c72ea20503610a4a7ba26c769357d31602769c01
- affected 5.13
- unaffected < 5.13
- unaffected 5.15.24 – ≤ 5.15.*
- unaffected 5.16.10 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (3)
- https://git.kernel.org/stable/c/b7f54894aa7517d2b6c797a499b9f491e9db9083 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/202071d2518537866d291aa7cf26af54e674f4d4 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c72ea20503610a4a7ba26c769357d31602769c01 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48801)Record last updated .