CVE-2009-4020

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

4.95% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 91.4% of scored records. A rank, not a probability.

NVD base score

The NVD has published no score for this record

NVD CVSS vector

No NVD score to derive

NVD analysis status

Modified. NVD last modified this record on 2026-06-16.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2009-12-04 21:00Z16 YR AGO

Last updated

2024-08-07 06:45Z2 YR AGO

Reserved

2009-11-20

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.1

Document digest

44a5e21646b58c77bd41d37e540813ec7671383ba2ffdf2cd359a31eff168830

• marc.info[linux-mm-commits] 20091203 + hfs-fix-a-potential-buffer-overflow.patch added to -mm treehttp://marc.info/?l=linux-mm-commits&m=125987755823047&w=2mailing-listx_refsource_MLIST
• secunia.com38276http://secunia.com/advisories/38276third-party-advisoryx_refsource_SECUNIA
• oval.cisecurity.orgoval:org.mitre.oval:def:10091https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10091vdb-entrysignaturex_refsource_OVAL
• support.avaya.comhttp://support.avaya.com/css/P8/documents/100073666x_refsource_CONFIRM
• www.openwall.com[oss-security] 20091204 CVE-2009-4020 kernel: hfs buffer overflowhttp://www.openwall.com/lists/oss-security/2009/12/04/1mailing-listx_refsource_MLIST
• oval.cisecurity.orgoval:org.mitre.oval:def:6750https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6750vdb-entrysignaturex_refsource_OVAL
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=540736x_refsource_CONFIRM
• userweb.kernel.orghttp://userweb.kernel.org/~akpm/mmotm/broken-out/hfs-fix-a-potential-buffer-overflow.patchx_refsource_CONFIRM
• lists.opensuse.orgSUSE-SA:2010:019http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00007.htmlvendor-advisoryx_refsource_SUSE
• www.novell.comSUSE-SA:2010:023http://www.novell.com/linux/security/advisories/2010_23_kernel.htmlvendor-advisoryx_refsource_SUSE
• rhn.redhat.comRHSA-2010:0095https://rhn.redhat.com/errata/RHSA-2010-0095.htmlvendor-advisoryx_refsource_REDHAT
• secunia.com39742http://secunia.com/advisories/39742third-party-advisoryx_refsource_SECUNIA
• lists.opensuse.orgSUSE-SA:2010:005http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00005.htmlvendor-advisoryx_refsource_SUSE
• rhn.redhat.comRHSA-2010:0046https://rhn.redhat.com/errata/RHSA-2010-0046.htmlvendor-advisoryx_refsource_REDHAT
• www.debian.orgDSA-2005http://www.debian.org/security/2010/dsa-2005vendor-advisoryx_refsource_DEBIAN