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CVE-2009-1633

25
FAUCET Score

CVE-2009-1633 describes multiple buffer overflow vulnerabilities in the CIFS subsystem of the Linux kernel, affecting versions prior to 2.6.29.4, including various Canonical and Debian Linux distributions. Remote CIFS servers can trigger these flaws by sending malformed Unicode strings or long Unicode characters. With a CVSS score of 7.1, this vulnerability is considered high severity, allowing for a denial of service (memory corruption) and potentially other unspecified impacts with network access and medium attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.6.29.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
6.06CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:lts:*:*:*
8.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.1HIGH

AV:N/AC:M/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.03%
Probability of exploitation in next 30 days
EPSS Percentile
86.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0303 is in the 45th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: MRG for RHEL-5Fixed in: kernel-rt-0:2.6.24.7-126.el5rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-89.0.7.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-128.1.14.el5
View patch

Vendor Advisories (1)

redhatCVE-2009-1633Important

kernel: cifs: fix potential buffer overruns when converting unicode strings sent by server

Apr 14, 2009

References

git.kernel.org
git.kernel.org
git.kernel.org
lists.opensuse.org / opensuse-security-announce/2009-11/msg00005.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2009-11/msg00007.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2010-02/msg00005.html
Mailing ListThird Party Advisory
marc.info
Mailing ListThird Party Advisory
marc.info
Mailing ListThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
secunia.com / advisories/35217
Third Party Advisory
secunia.com / advisories/35226
Third Party Advisory
secunia.com / advisories/35298
Third Party Advisory
secunia.com / advisories/35656
Third Party Advisory
secunia.com / advisories/35847
Third Party Advisory
secunia.com / advisories/36051
Third Party Advisory
secunia.com / advisories/36327
Third Party Advisory
secunia.com / advisories/37351
Third Party Advisory
secunia.com / advisories/37471
Third Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8588
Third Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9525
Third Party Advisory
redhat.com / archives/fedora-package-announce/2009-May/msg01126.html
PatchThird Party Advisory
redhat.com / archives/fedora-package-announce/2009-May/msg01271.html
Third Party Advisory
wiki.rpath.com / Advisories:rPSA-2009-0111
Broken Link
debian.org / security/2009/dsa-1809
Third Party Advisory
debian.org / security/2009/dsa-1844
Third Party Advisory
debian.org / security/2009/dsa-1865
Third Party Advisory
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.29.4
Vendor Advisory
mandriva.com / security/advisories
Third Party Advisory
openwall.com / lists/oss-security/2009/05/14/1
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2009/05/14/4
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2009/05/15/2
Mailing ListPatchThird Party Advisory
redhat.com / support/errata/RHSA-2009-1157.html
Third Party Advisory
securityfocus.com / archive/1/505254/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / archive/1/507985/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/34612
Third Party AdvisoryVDB Entry
ubuntu.com / usn/usn-793-1
Third Party Advisory
vmware.com / security/advisories/VMSA-2009-0016.html
Third Party Advisory
vupen.com / english/advisories/2009/3316
Third Party Advisory