kernel: Null pointer dereference when mounting ext4
Published May 2, 2016
4.6
MEDIUMCVSS 3.0
EPSS 0.43%
Description
The ext4 implementation in the Linux kernel before 2.6.34 does not properly track the initialization of certain data structures, which allows physically proximate attackers to cause a denial of service (NULL pointer dereference and panic) via a crafted USB device, related to the ext4_fill_super function.
Affected products
No data.
- ≤ 2.6.33.20
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-642.el6
Fixed · RHSA-2016:0855
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-642.el6 | Fixed | RHSA-2016:0855 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This problem did not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 7 and MRG-2.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.43% (0.00426) | 34.55th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.43% (0.00426) | 33.80th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00089) | 23.25th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.24% (0.00241) | 62.93th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.24% (0.00241) | 62.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.24% (0.00241) | 60.22th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.11% (0.01108) | 54.62th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.54% (0.01537) | 73.85th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
References (10)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=744692dc059845b2a3022119871846e74d4f6e11 x_refsource_CONFIRMVendor Advisory
- http://mirror.linux.org.au/linux/kernel/v2.6/ChangeLog-2.6.34 x_refsource_CONFIRM
- http://rhn.redhat.com/errata/RHSA-2016-0855.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2015/11/23/2 mailing-listx_refsource_MLIST
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2015-8324 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1267261 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/744692dc059845b2a3022119871846e74d4f6e11 x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-8324
- https://www.cve.org/CVERecord?id=CVE-2015-8324
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=744692dc059845b2a3022119871846e74d4f6e11 | x_refsource_CONFIRMVendor Advisory | |
| http://mirror.linux.org.au/linux/kernel/v2.6/ChangeLog-2.6.34 | x_refsource_CONFIRM | |
| http://rhn.redhat.com/errata/RHSA-2016-0855.html | vendor-advisoryx_refsource_REDHAT | |
| http://www.openwall.com/lists/oss-security/2015/11/23/2 | mailing-listx_refsource_MLIST | |
| http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html | x_refsource_CONFIRM | |
| https://access.redhat.com/security/cve/CVE-2015-8324 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1267261 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/744692dc059845b2a3022119871846e74d4f6e11 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-8324 | ||
| https://www.cve.org/CVERecord?id=CVE-2015-8324 |
Change history (0)
No recorded changes yet.