CVE-2017-8924 — The edge_bulk_in_callback function in drivers/usb/serial/io_ti

The edge_bulk_in_callback function in drivers/usb/serial/io_ti.c in the Linux kernel before 4.10.4 allows local users to obtain sensitive information (in the dmesg ringbuffer and syslog) from uninitialized kernel memory by using a crafted USB device (posing as an io_ti USB serial

01What is this vulnerability?

The edge_bulk_in_callback function in drivers/usb/serial/io_ti.c in the Linux kernel before 4.10.4 allows local users to obtain sensitive information (in the dmesg ringbuffer and syslog) from uninitialized kernel memory by using a crafted USB device (posing as an io_ti USB serial device) to trigger an integer underflow.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

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: 2017-05-12T21:29:00.207
• Last modified: 2026-05-13T00:24:29.033

09References

• git.kernel.org — http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=654b40…
• www.debian.org — http://www.debian.org/security/2017/dsa-3886
• www.kernel.org — http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.4
• www.securityfocus.com — http://www.securityfocus.com/bid/98451
• github.com — https://github.com/torvalds/linux/commit/654b404f2a222f918af9b0cd18ad469d0c941a8…
• git.kernel.org — http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=654b40…
• www.debian.org — http://www.debian.org/security/2017/dsa-3886
• www.kernel.org — http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.4
• www.securityfocus.com — http://www.securityfocus.com/bid/98451
• github.com — https://github.com/torvalds/linux/commit/654b404f2a222f918af9b0cd18ad469d0c941a8…