kernel: ext4: kernel panic when writing data to the last block of sparse file
Published Jul 28, 2011
4.9
MEDIUMCVSS 2.0
EPSS 0.45%
Description
Multiple off-by-one errors in the ext4 subsystem in the Linux kernel before 3.0-rc5 allow local users to cause a denial of service (BUG_ON and system crash) by accessing a sparse file in extent format with a write operation involving a block number corresponding to the largest possible 32-bit unsigned integer.
Affected products
No data.
- < 3.0
- 3.0
- 3.0
- 3.0
- 3.0
- 3.0
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.7.1.el5
Fixed · RHSA-2011:1386
Red Hat Enterprise Linux 6
kernel-0:2.6.32-131.12.1.el6
Fixed · RHSA-2011:1189
Red Hat Enterprise MRG 2
kernel-rt-0:2.6.33.9-rt31.75.el6rt
Fixed · RHSA-2011:1253
Red Hat Enterprise Linux 4
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.7.1.el5 | Fixed | RHSA-2011:1386 |
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-131.12.1.el6 | Fixed | RHSA-2011:1189 |
| Red Hat Enterprise MRG 2 | kernel-rt-0:2.6.33.9-rt31.75.el6rt | Fixed | RHSA-2011:1253 |
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-1386.html, https://rhn.redhat.com/errata/RHSA-2011-1189.html, and https://rhn.redhat.com/errata/RHSA-2011-1253.html. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not include support for EXT4 filesystem.
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.45% (0.00451) | 36.86th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.45% (0.00451) | 35.61th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00051) | 12.96th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.03% (0.01034) | 41.16th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.28% (0.01282) | 67.60th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (10)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f17722f917b2f21497deb6edc62fb1683daa08e6 x_refsource_CONFIRM
- http://secunia.com/advisories/45193 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.0-rc5 x_refsource_CONFIRMBroken Link
- http://www.openwall.com/lists/oss-security/2011/07/15/7 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2011/07/15/8 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.spinics.net/lists/linux-ext4/msg25697.html mailing-listx_refsource_MLISTExploitPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2011-2695 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=722557 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-2695
- https://www.cve.org/CVERecord?id=CVE-2011-2695
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f17722f917b2f21497deb6edc62fb1683daa08e6 | x_refsource_CONFIRM | |
| http://secunia.com/advisories/45193 | third-party-advisoryx_refsource_SECUNIAThird Party Advisory | |
| http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.0-rc5 | x_refsource_CONFIRMBroken Link | |
| http://www.openwall.com/lists/oss-security/2011/07/15/7 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2011/07/15/8 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.spinics.net/lists/linux-ext4/msg25697.html | mailing-listx_refsource_MLISTExploitPatchThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2011-2695 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=722557 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2695 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2695 |
Change history (0)
No recorded changes yet.