net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an…

Description

net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an abstract-namespace AF_UNIX listening socket, performing a shutdown operation on this socket, and then performing a series of connect operations to this socket.

Scores

EPSS (exploitation in 30 days)

0.99% · top 37% of all CVEs (7 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

• n/a
• CWE-400 (opens in a new tab)All about CWE-400 and its CVEs

Affected products

• n/a

  • affected n/a

References (26)

• [oss-security] 20091019 CVE request: kernel: AF_UNIX: Fix deadlock on connecting to shutdown socket (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=529626 (opens in a new tab)x_refsource_CONFIRMx_transferred
• [linux-kernel] 20091019 Re: [PATCH] AF_UNIX: Fix deadlock on connecting to shutdown socket (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2009:1671 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [oss-security] 20091019 Re: CVE request: kernel: AF_UNIX: Fix deadlock on connecting to shutdown socket (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2009:1540 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• SUSE-SA:2009:061 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• USN-864-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• 38794 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• SUSE-SA:2010:001 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• MDVSA-2009:329 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• SUSE-SA:2010:012 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git%3Ba=commit%3Bh=77238f2b942b38ab4e7f3aced44084493e4a8675 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 37909 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• oval:org.mitre.oval:def:9921 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• http://patchwork.kernel.org/patch/54678/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2009:1670 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• SUSE-SA:2009:064 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 38834 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• oval:org.mitre.oval:def:6895 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• SUSE-SA:2010:013 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 37086 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 38017 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• FEDORA-2009-11038 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• ADV-2010-0528 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2009-3621](https://trackcve.app/badge/CVE-2009-3621.svg)](https://trackcve.app/cve/CVE-2009-3621)

Record last updated 7 Aug 2024, 06:31 UTC.