kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which…
Priority LOW 31CWE-264Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-264.
Summary
kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here.
Why it matters now
EPSS 0.00398 34th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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: Important. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise MRG 2
Timeline
- 2026-10-02 Threatist record created from CVE-2015-8709
- 2026-10-03 Alias added: GHSA-fpp6-vh8j-3rgm
References
Advisory 17
Other 6
- [linux-kernel] 20151226 [PATCH] ptrace: being capable wrt a process requires mapped uids/gids
- [linux-kernel] 20160106 Re: [PATCH] ptrace: being capable wrt a process requires mapped uids/gids
- [oss-security] 20151231 Re: CVE Request: Linux kernel: privilege escalation in user namespaces
- [oss-security] 20151217 CVE Request: Linux kernel: privilege escalation in user namespaces
- [linux-kernel] 20160106 Re: [PATCH] ptrace: being capable wrt a process requires mapped uids/gids
- https://bugzilla.redhat.com/show_bug.cgi?id=1295287
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-2015-8709 · CVE Program
- CVE-2015-8709 · NVD
- FIRST EPSS
- GHSA-fpp6-vh8j-3rgm · GitHub Advisory Database · CC BY 4.0
- CVE-2015-8709 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences