CVE-2018-18386 — drivers/tty/n_tty
drivers/tty/n_tty.c in the Linux kernel before 4.14.11 allows local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ.
Published
2018-10-17T20:00:00.000Z
Last modified
2024-08-05T11:08:21.778Z
01What is this vulnerability?
drivers/tty/n_tty.c in the Linux kernel before 4.14.11 allows local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2018-10-17T20:00:00.000Z
- Last modified: 2024-08-05T11:08:21.778Z
09References
- usn.ubuntu.com — https://usn.ubuntu.com/3849-1/
- bugzilla.suse.com — https://bugzilla.suse.com/show_bug.cgi?id=1094825
- usn.ubuntu.com — https://usn.ubuntu.com/3849-2/
- cdn.kernel.org — https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11
- github.com — https://github.com/torvalds/linux/commit/966031f340185eddd05affcf72b740549f05634…
- git.kernel.org — http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031…
- access.redhat.com — https://access.redhat.com/errata/RHSA-2019:0831
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