What is CVE-2009-0745?

CVE-2009-0745 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10, classified as a Improper Input Validation flaw (CWE-20). CVE-2009-0745 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2009-0745?

CVE-2009-0745 has a CVSS score of 4.9 out of 10, rated Medium severity. The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2009-0745?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2009-0745 patch availability.

Is CVE-2009-0745 actively exploited?

CVE-2009-0745 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2009-0745

Medium

The ext4_group_add function in fs/ext4/resize.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not properly initialize the group descriptor during a resize (aka resize2fs) operation, which might allow local users to cause a denial of service (OOPS) by arranging for crafted values to be present in available memory.

Package Linux Kernel

Published 2009-02-27

Last modified 2026-04-23

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

4.9

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

None

Availability

Vector string

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

Weakness type

CWE-20

CVE-2009-0745 is a Improper Input Validation vulnerability

What is Improper Input Validation?

The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. Learn more on MITRE CWE

References

18 total

Vupen
http://www.vupen.com/english/advisories/2009/0509

Vendor Advisory
Kernel.org
http://bugzilla.kernel.org/show_bug.cgi?id=12433
Kernel Git
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fdff73f094e7220602cc3f8959c7230517976412
Kernel.org
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19
Kernel.org
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7

Showing 5 of 18 references View all on NVD

Details

CVE ID CVE-2009-0745

Severity Medium

CVSS score 4.9 / 10

CVSS version 2.0

Published 2009-02-27

Modified 2026-04-23

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2009-0745?

CVE-2009-0745 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10 , classified as an Improper Input Validation flaw (CWE-20) . CVE-2009-0745 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2009-0745?

CVE-2009-0745 has a CVSS score of 4.9 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C.
Is there a patch available for CVE-2009-0745?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2009-0745 patch availability.
Is CVE-2009-0745 actively exploited?

No. CVE-2009-0745 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.