kernel: hfs buffer overflow
Published Dec 4, 2009
7.8
HIGHCVSS 2.0
EPSS 4.76%
Description
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
Affected products
No data.
- 2.6.32
No data.
Red Hat Enterprise Linux 4
kernel-0:2.6.9-89.0.20.EL
Fixed · RHSA-2010:0076
Red Hat Enterprise Linux 5
kernel-0:2.6.18-164.11.1.el5
Fixed · RHSA-2010:0046
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | kernel-0:2.6.9-89.0.20.EL | Fixed | RHSA-2010:0076 |
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-164.11.1.el5 | Fixed | RHSA-2010:0046 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the version of the Linux kernel as shipped with Red Hat Enterprise MRG as the affected driver is not enabled in this kernel. Red Hat Enterprise Linux 3 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata, and this issue is rated as having low impact, therefore the fix for this issue is not currently planned to be included in the future updates.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.76% (0.04759) | 91.61th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.95% (0.04952) | 91.03th | v5 (v2026.06.15) |
| Jun 8, 2026 | 5.78% (0.05780) | 90.66th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.86% (0.03864) | 87.15th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.54% (0.02537) | 75.70th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.59% (0.04591) | 88.50th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.83% (0.04834) | 93.04th | v3 (v2023.03.01) |
| Aug 24, 2024 | 4.83% (0.04834) | 92.88th | v3 (v2023.03.01) |
| Jun 3, 2024 | 9.16% (0.09165) | 94.66th | v3 (v2023.03.01) |
| Mar 8, 2024 | 10.07% (0.10066) | 94.76th | v3 (v2023.03.01) |
| May 2, 2023 | 11.26% (0.11258) | 94.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 8.28% (0.08276) | 93.32th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Feb 13, 2023 | 3.78% (0.03779) | 85.08th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.69% (0.02686) | 82.44th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
References (18)
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00005.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00007.html vendor-advisoryx_refsource_SUSE
- http://marc.info/?l=linux-mm-commits&m=125987755823047&w=2 mailing-listx_refsource_MLIST
- http://secunia.com/advisories/38276 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/39742 third-party-advisoryx_refsource_SECUNIA
- http://support.avaya.com/css/P8/documents/100073666 x_refsource_CONFIRM
- http://userweb.kernel.org/~akpm/mmotm/broken-out/hfs-fix-a-potential-buffer-overflow.patch x_refsource_CONFIRMPatch
- http://www.debian.org/security/2010/dsa-2005 vendor-advisoryx_refsource_DEBIAN
- http://www.novell.com/linux/security/advisories/2010_23_kernel.html vendor-advisoryx_refsource_SUSE
- http://www.openwall.com/lists/oss-security/2009/12/04/1 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2009-4020 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=540736 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-4020
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10091 vdb-entrysignaturex_refsource_OVAL
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6750 vdb-entrysignaturex_refsource_OVAL
- https://rhn.redhat.com/errata/RHSA-2010-0046.html vendor-advisoryx_refsource_REDHAT
- https://rhn.redhat.com/errata/RHSA-2010-0095.html vendor-advisoryx_refsource_REDHAT
- https://www.cve.org/CVERecord?id=CVE-2009-4020
Change history (0)
No recorded changes yet.