kernel: ext4: ext4_isize() denial of service
Published Feb 27, 2009
4.9
MEDIUMCVSS 2.0
EPSS 0.41%
Description
The ext4_isize function in fs/ext4/ext4.h in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 uses the i_size_high structure member during operations on arbitrary types of files, which allows local users to cause a denial of service (CPU consumption and error-message flood) by attempting to mount a crafted ext4 filesystem.
Affected products
No data.
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27
- 2.6.27.1
- 2.6.27.2
- 2.6.27.3
- 2.6.27.4
- 2.6.27.5
- 2.6.27.6
- 2.6.27.7
- 2.6.27.8
- 2.6.27.9
- 2.6.27.10
- 2.6.27.11
- 2.6.27.12
- 2.6.27.13
- 2.6.27.14
- 2.6.27.15
- 2.6.27.16
- 2.6.27.17
- 2.6.27.18
- 2.6.28
- 2.6.28
- 2.6.28
- 2.6.28
- 2.6.28
- 2.6.28
- 2.6.28
- 2.6.28
- 2.6.28.1
- 2.6.28.2
- 2.6.28.3
- 2.6.28.4
- 2.6.28.5
- 2.6.28.6
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-164.el5
Fixed · RHSA-2009:1243
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-164.el5 | Fixed | RHSA-2009:1243 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and Red Hat Enterprise MRG.
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:L/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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.41% (0.00412) | 33.06th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.41% (0.00412) | 32.62th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00061) | 16.13th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.89th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.04% (0.00044) | 10.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
References (20)
- http://bugzilla.kernel.org/show_bug.cgi?id=12375 x_refsource_CONFIRMPatch
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=06a279d636734da32bb62dd2f7b0ade666f65d7c x_refsource_CONFIRM
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19 x_refsource_CONFIRM
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7 x_refsource_CONFIRM
- http://rhn.redhat.com/errata/RHSA-2009-1243.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/34394 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/36562 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/37471 third-party-advisoryx_refsource_SECUNIA
- http://www.debian.org/security/2009/dsa-1749 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/archive/1/507985/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.ubuntu.com/usn/usn-751-1 vendor-advisoryx_refsource_UBUNTU
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html x_refsource_CONFIRM
- http://www.vupen.com/english/advisories/2009/0509 vdb-entryx_refsource_VUPENVendor Advisory
- http://www.vupen.com/english/advisories/2009/3316 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2009-0747 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=487942 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-0747
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8585 vdb-entrysignaturex_refsource_OVAL
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9200 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2009-0747
Change history (0)
No recorded changes yet.