CVE-2021-47358
staging: greybus: uart: fix tty use after free
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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: staging: greybus: uart: fix tty use after free User space can hold a tty open indefinitely and tty drivers must not release the underlying structures until the last user is gone. Switch to using the tty-port reference counter to manage the life time of the greybus tty state to avoid use after free after a disconnect.
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
4.9
References 7
git.kernel.org
- stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d
- stable/c/64062fcaca8872f063ec9da011e7bf30470be33f
- stable/c/a5cfd51f6348e8fd7531461366946039c29c7e69
- stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14
- stable/c/b9e697e60ce9890e9258a73eb061288e7d68e5e6
- stable/c/9872ff6fdce8b229f01993b611b5d1719cb70ff1
- stable/c/92dc0b1f46e12cfabd28d709bb34f7a39431b44f