CVE-2021-47476
comedi: ni_usb6501: fix NULL-deref in command paths
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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: comedi: ni_usb6501: fix NULL-deref in command paths The driver uses endpoint-sized USB transfer buffers but had no sanity checks on the sizes. This can lead to zero-size-pointer dereferences or overflowed transfer buffers in ni6501_port_command() and ni6501_counter_command() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing). Add the missing sanity checks to probe().
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
3.18
References 9
git.kernel.org
- stable/c/58478143771b20ab219937b1c30a706590a59224
- stable/c/aa39738423503825625853b643b9e99d11c23816
- stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632
- stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1
- stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3
- stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1
- stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7ea
- stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1
- stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440