Description
Use-after-free vulnerability in the nfqnl_zcopy function in net/netfilter/nfnetlink_queue_core.c in the Linux kernel through 3.13.6 allows attackers to obtain sensitive information from kernel memory by leveraging the absence of a certain orphaning operation. NOTE: the affected code was moved to the skb_zerocopy function in net/core/skbuff.c before the vulnerability was announced.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 3.13.7-1 | — |
| Debian 13 | linux | 3.13.7-1 | — |
| Debian 12 | linux | 3.13.7-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-29.53 | USN-2240-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +17 | 3.10.0-123.4.2.el7 | RHSA-2014:0786 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +11 | 3.10.0-123.4.2.el7 | ELSA-2014-0786 |
Advisories 3
- RHSA-2014:0786 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2240-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- ELSA-2014-0786 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 23, 2014
References
- [linux-kernel] 20140320 [PATCH v3] core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1079012
- USN-2240-1 vendor-advisory
- 66348 vdb-entry
- 59599 third-party-advisory
- linux-kernel-cve20142568-info-disclosure(91922) vdb-entry
- [oss-sec] 20140320 CVE request -- kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied mailing-list
- [oss-security] 20140320 Re: CVE request -- kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied mailing-list