CVE-2014-7822
Description
The implementation of certain splice_write file operations in the Linux kernel before 3.16 does not enforce a restriction on the maximum size of a single file, which allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted splice system call, as demonstrated by use of a file descriptor associated with an ext4 filesystem.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Linux Kernel 3.13/3.14 (Ubuntu) - 'splice()' System Call Local Denial of Service
OS impact
Linux kernel Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 3.16.2-1 |
| sid | Fixed | 3.16.2-1 |
| forky | Fixed | 3.16.2-1 |
| bullseye | Fixed | 3.16.2-1 |
| bookworm | Fixed | 3.16.2-1 |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8d0207652cbe27d1f962050737848e5ad4671958
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
- http://rhn.redhat.com/errata/RHSA-2015-0102.html
- http://rhn.redhat.com/errata/RHSA-2015-0164.html
- http://rhn.redhat.com/errata/RHSA-2015-0674.html
- http://rhn.redhat.com/errata/RHSA-2015-0694.html
- http://www.debian.org/security/2015/dsa-3170
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.osvdb.org/117810
- http://www.securityfocus.com/bid/72347
- http://www.ubuntu.com/usn/USN-2541-1
- http://www.ubuntu.com/usn/USN-2542-1
- http://www.ubuntu.com/usn/USN-2543-1
- http://www.ubuntu.com/usn/USN-2544-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1163792
- https://github.com/torvalds/linux/commit/8d0207652cbe27d1f962050737848e5ad4671958
- https://www.exploit-db.com/exploits/36743/
- https://security-tracker.debian.org/tracker/CVE-2014-7822
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.