CVE-2015-8953
published 2016-10-16CVE-2015-8953: 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…
PriorityP417medium5.5CVSS 3.0
AVLACLPRLUINSUCNINAH
EPSS
0.54%
42.7th percentile
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.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 4.2.6-1 (bookworm) | linux 4.2.6-1 (bookworm) |
| linux | linux_kernel | <= 4.2.5 | — |
| linux | linux_kernel | >= 0 < 4.2.6-1 | 4.2.6-1 |
| linux | linux_kernel | >= 0 < 4.2.6-1 | 4.2.6-1 |
| linux | linux_kernel | >= 0 < 4.2.6-1 | 4.2.6-1 |
| linux | linux_kernel | >= 0 < 4.2.6-1 | 4.2.6-1 |
CVSS provenance
nvdv3.05.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv2.04.9MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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GHSA
GHSA-xvcx-4642-fhpw: fs/overlayfs/copy_up
ghsa_unreviewed·2022-05-17
CVE-2015-8953 [MEDIUM] GHSA-xvcx-4642-fhpw: fs/overlayfs/copy_up
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.
OSV
CVE-2015-8953: fs/overlayfs/copy_up
osv·2016-10-16·CVSS 5.5
CVE-2015-8953 [MEDIUM] CVE-2015-8953: fs/overlayfs/copy_up
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.
Red Hat
kernel: overlayfs: Double dentry reference leak in copy-up failure
vendor_redhat·2016-08-23·CVSS 5.5
CVE-2015-8953 [MEDIUM] CWE-772 kernel: overlayfs: Double dentry reference leak in copy-up failure
kernel: overlayfs: Double dentry reference leak in copy-up failure
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.
A flaw was found in the Linux kernel's implementation of overlayfs. An attacker can leak file resources in the system by opening a large file with write permissions on a overlay filesystem that is insufficient to deal with the size of the write.
When unmounting the underlying device, the system is unable to free an inode and this will consume resources. Repeating this for all available inodes and memory will create a denial of service situation.
Statement: This issue does not affect t
Debian
CVE-2015-8953: linux - fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanu...
vendor_debian·2015·CVSS 5.5
CVE-2015-8953 [MEDIUM] CVE-2015-8953: linux - fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanu...
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.
Scope: local
bookworm: resolved (fixed in 4.2.6-1)
bullseye: resolved (fixed in 4.2.6-1)
forky: resolved (fixed in 4.2.6-1)
sid: resolved (fixed in 4.2.6-1)
trixie: resolved (fixed in 4.2.6-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2015-8953 kernel: overlayfs: Double dentry reference leak in copy-up failure [fedora-all]
bugzilla·2016-08-26·CVSS 5.5
CVE-2015-8953 [MEDIUM] CVE-2015-8953 kernel: overlayfs: Double dentry reference leak in copy-up failure [fedora-all]
CVE-2015-8953 kernel: overlayfs: Double dentry reference leak in copy-up failure [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple suppor
Bugzilla
CVE-2015-8953 kernel: overlayfs: Double dentry reference leak in copy-up failure
bugzilla·2016-08-17·CVSS 5.5
CVE-2015-8953 [MEDIUM] CVE-2015-8953 kernel: overlayfs: Double dentry reference leak in copy-up failure
CVE-2015-8953 kernel: overlayfs: Double dentry reference leak in copy-up failure
A flaw was found in the Linux kernels implementation of overlayfs. An attacker can leak a file resources in the system by opening a large file with write permissions on a overlay filesystem that is insufficient to deal with the size of the write.
When unmounting the underlying device, the system is unable to free an inode and this will consume resources. Repeating this for all available inodes and memory will create a denial of service situation.
Product bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1261073
Upstream patch:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5
Discussion:
CVE assignment:
http://seclists.org/oss-sec/2016/q3
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6http://www.openwall.com/lists/oss-security/2016/08/23/9http://www.securityfocus.com/bid/92611https://bugzilla.redhat.com/show_bug.cgi?id=1367814https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6http://www.openwall.com/lists/oss-security/2016/08/23/9http://www.securityfocus.com/bid/92611https://bugzilla.redhat.com/show_bug.cgi?id=1367814https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5
2016-10-16
Published