Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel before 4.3.3…
Priority LOW 25Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel before 4.3.3 allows local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls.
Why it matters now
EPSS 0.00625 50th percentileScored 2026-11-07
Public exploit Yes 4 exploit referencesTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
Not affected: 2 products
- Red Hat Enterprise Linux 4
- Red Hat Enterprise MRG 2
Timeline
- 2026-10-02 Threatist record created from CVE-2013-7446
- 2026-10-03 Alias added: GHSA-w9h3-r69r-j5c4
- 2026-11-03 EPSS moved to the 50th–90th percentile
References
Exploit 4
- [netdev] 20150304 [PATCH net] af_unix: don't poll dead peers
- [linux-kernel] 20150913 List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket
- [linux-kernel] 20140515 eventpoll __list_del_entry corruption (was: perf: use after free in perf_remove_from_context)
- [linux-kernel] 20131014 Re: epoll oops.
Advisory 42
- SUSE-SU-2016:0750
- SUSE-SU-2016:2010
- SUSE-SU-2016:2011
- SUSE-SU-2016:2003
- SUSE-SU-2016:0751
- SUSE-SU-2016:0747
- SUSE-SU-2016:0755
- SUSE-SU-2016:1994
- USN-2887-2
- SUSE-SU-2016:0757
- SUSE-SU-2016:1961
- SUSE-SU-2016:2001
- SUSE-SU-2016:0753
- USN-2886-1
- USN-2887-1
- USN-2890-3
- SUSE-SU-2016:2006
- USN-2889-1
- SUSE-SU-2016:2014
- openSUSE-SU-2016:1641
- USN-2889-2
- SUSE-SU-2016:0746
- SUSE-SU-2016:0749
- SUSE-SU-2016:1102
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.3
- SUSE-SU-2016:2009
- SUSE-SU-2016:2005
- SUSE-SU-2016:2007
- SUSE-SU-2016:2074
- USN-2890-2
- SUSE-SU-2016:2000
- SUSE-SU-2016:0745
- DSA-3426
- SUSE-SU-2016:1995
- SUSE-SU-2016:2002
- SUSE-SU-2016:0756
- https://github.com/torvalds/linux/commit/7d267278a9ece963d77eefec61630223fce08c6c
- USN-2890-1
- SUSE-SU-2016:0754
- SUSE-SU-2016:0752
- USN-2888-1
- SUSE-SU-2016:0911
Other 5
- https://groups.google.com/forum/#%21topic/syzkaller/3twDUI4Cpm8
- https://forums.grsecurity.net/viewtopic.php?f=3&t=4150
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7d267278a9ece963d77eefec61630223fce08c6c
- https://bugzilla.redhat.com/show_bug.cgi?id=1282688
- [oss-security] 20151118 Re: CVE request - Linux kernel - Unix sockets use after free - peer_wait_queue prematurely freed
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2013-7446 · CVE Program
- CVE-2013-7446 · NVD
- FIRST EPSS
- GHSA-w9h3-r69r-j5c4 · GitHub Advisory Database · CC BY 4.0
- CVE-2013-7446 · Red Hat security data · CC BY 4.0
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