Vulnerability Details : CVE-2015-8953
Potential exploit
fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.
Vulnerability category: Denial of service
Products affected by CVE-2015-8953
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-8953
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 19 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-8953
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2015-8953
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-8953
-
https://bugzilla.redhat.com/show_bug.cgi?id=1367814
1367814 – (CVE-2015-8953) CVE-2015-8953 kernel: overlayfs: Double dentry reference leak in copy-up failureIssue Tracking;Third Party Advisory;VDB Entry
-
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5
kernel/git/torvalds/linux.git - Linux kernel source treeExploit;Patch;Vendor Advisory
-
http://www.openwall.com/lists/oss-security/2016/08/23/9
oss-security - cve request: overlayfs: Fix dentry reference leakExploit;Third Party Advisory
-
http://www.securityfocus.com/bid/92611
Linux Kernel 'ovl_copy_up_locked()' Local Denial of Service Vulnerability
-
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6
Release Notes;Vendor Advisory
-
https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5
ovl: fix dentry reference leak · torvalds/linux@ab79efa · GitHubPatch
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