CVE-2022-48771
drm/vmwgfx: Fix stale file descriptors on failed usercopy
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- 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
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Fix stale file descriptors on failed usercopy A failing usercopy of the fence_rep object will lead to a stale entry in the file descriptor table as put_unused_fd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios. Fix this by deferring the call to fd_install() until after the usercopy has succeeded.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.14
References 7
git.kernel.org
- stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516
- stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d
- stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82
- stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414
- stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c
- stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565
- stable/c/a0f90c8815706981c483a652a6aefca51a5e191c