Description
Buffer overflow in fs/cifs/connect.c in CIFS in the Linux kernel 2.6.29 and earlier allows remote attackers to cause a denial of service (crash) via a long nativeFileSystem field in a Tree Connect response to an SMB mount request.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | linux-2.6 | 2.6.26-15lenny2 | DSA-1800-1 |
| Debian 5.0 | user-mode-linux | 2.6.26-1um-2+15lenny2 | DSA-1800-1 |
| Debian 4.0 | fai-kernels | 1.17+etch.24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6 | 2.6.18.dfsg.1-24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.8etch1 | DSA-1787-1 |
| Debian 4.0 | user-mode-linux | 2.6.18-1um-2etch.24etch2 | DSA-1794-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +12 | 2.6.18-128.1.14.el5 | RHSA-2009:1106 |
| RHEL 4 | kernel +10 | 2.6.9-89.0.7.EL | RHSA-2009:1211 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | kernel-rt +9 | 2.6.24.7-117.el5rt | RHSA-2009:1081 |
Advisories 6
- RHSA-2009:1211 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2009:1106 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2009:1081 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-1787-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1794-1 linux-2.6 - multiple vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1800-1 linux-2.6 user-mode-linux - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 35390 third-party-advisory
- [oss-security] 20090407 Re: CVE request? buffer overflow in CIFS in 2.6.* mailing-list
- [oss-security] 20090405 CVE request? buffer overflow in CIFS in 2.6.* mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b363b3304bcf68c4541683b2eff70b29f0446a5b
- 35226 third-party-advisory
- SUSE-SA:2009:028 vendor-advisory
- 37471 third-party-advisory
- FEDORA-2009-5356 vendor-advisory
- SUSE-SA:2009:032 vendor-advisory
- 35656 third-party-advisory
- http://xorl.wordpress.com/2009/04/07/linux-kernel-tree-connect-cifs-remote-buffer-overflow/
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- oval:org.mitre.oval:def:8265 vdb-entry signature
- DSA-1794 vendor-advisory
- 20090516 rPSA-2009-0084-1 kernel mailing-list
- 34453 vdb-entry
- SUSE-SA:2009:030 vendor-advisory
- 35185 third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=494275
- 35011 third-party-advisory
- 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components mailing-list
- http://blog.fefe.de/?ts=b72905a8
- [oss-security] 20090407 Re: CVE request? buffer overflow in CIFS in 2.6.* mailing-list
- 35120 third-party-advisory
- https://bugzilla.novell.com/show_bug.cgi?id=492282
- SUSE-SA:2009:031 vendor-advisory
- USN-793-1 vendor-advisory
- FEDORA-2009-5383 vendor-advisory
- RHSA-2009:1081 vendor-advisory
- 34981 third-party-advisory
- DSA-1800 vendor-advisory
- 35343 third-party-advisory
- [linux-cifs-client] 20090406 [PATCH] cifs: Fix insufficient memory allocation for nativeFileSystem field mailing-list
- 35387 third-party-advisory
- DSA-1787 vendor-advisory
- 35217 third-party-advisory
- oval:org.mitre.oval:def:10321 vdb-entry signature
- http://wiki.rpath.com/Advisories:rPSA-2009-0084
- 35121 third-party-advisory
- ADV-2009-3316 vdb-entry
- 35394 third-party-advisory