drm/vmwgfx: Fix a null-ptr access in the cursor snooper
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Fix a null-ptr access in the cursor snooper Check that the resource which is converted to a surface exists before trying to use the cursor snooper on it. vmw_cmd_res_check allows explicit invalid (SVGA3D_INVALID_ID) identifiers because some svga commands accept SVGA3D_INVALID_ID to mean "no surface", unfortunately functions that accept the actual surfaces as objects might (and in case of the cursor snooper, do not) be able to handle null objects. Make sure that we validate not only the identifier (via the vmw_cmd_res_check) but also check that the actual resource exists before trying to do something with it. Fixes unchecked null-ptr reference in the snooping code.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.8
References 7
git.kernel.org
- stable/c/3332212e93d0f6e24f8fe79f975e077c4e68ca39
- stable/c/86aae7053d2da3fdfde7b2e84d86e4af50490505
- stable/c/af9d88cbf0fce52f465978360542ef679713491f
- stable/c/299cfb5a7deabdf9ecd30071755672af0aced5eb
- stable/c/13c9e4ed125e19484234c960efe5ac9c55119523
- stable/c/b6fca0a07989f361ceda27cb2d09c555d4d4a964
- stable/c/5ac2c0279053a2c5265d46903432fb26ae2d0da2