watch_queue: fix pipe accounting mismatch
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: watch_queue: fix pipe accounting mismatch Currently, watch_queue_set_size() modifies the pipe buffers charged to user->pipe_bufs without updating the pipe->nr_accounted on the pipe itself, due to the if (!pipe_has_watch_queue()) test in pipe_resize_ring(). This means that when the pipe is ultimately freed, we decrement user->pipe_bufs by something other than what than we had charged to it, potentially leading to an underflow. This in turn can cause subsequent too_many_pipe_buffers_soft() tests to fail with -EPERM. To remedy this, explicitly account for the pipe usage in watch_queue_set_size() to match the number set via account_pipe_buffers() (It's unclear why watch_queue_set_size() does not update nr_accounted; it may be due to intentional overprovisioning in watch_queue_set_size()?)
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.10.210 to before 5.10.236; 5.15.149 to before 5.15.180; 6.1.76 to before 6.1.134; 6.6.15 to before 6.6.87; 6.7.3 to before 6.8 | 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.8 | Patch available | CNA |
| Linux | Linux | 6.8 and later | 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.210 to before 5.10.236; 5.15.149 to before 5.15.180; 6.1.76 to before 6.1.134; 6.6.15 to before 6.6.87; 6.7.3 to before 6.8 Fixed in 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.8 Patch available CNA
- Linux VendorLinux Affected 6.8 and later Fixed in 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15 Patch available CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.10.210 to before 5.10.236; 5.15.149 to before 5.15.180; 6.1.76 to before 6.1.134; 6.6.15 to before 6.6.87; 6.7.3 to before 6.12.23; 6.13 to before 6.13.11; 6.14 to before 6.14.2 | Vulnerable | Linux |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.10.210 to before 5.10.236; 5.15.149 to before 5.15.180; 6.1.76 to before 6.1.134; 6.6.15 to before 6.6.87; 6.7.3 to before 6.12.23; 6.13 to before 6.13.11; 6.14 to before 6.14.2 Vulnerable ·Linux
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.8
- Fix · CNA Linux (Linux) Fixed in 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2025-23138
- 2026-10-03 Alias added: GHSA-9ccw-6g9x-96r5
- 2026-11-05 CISA SSVC decision points changed
References
Patch 8
- https://git.kernel.org/stable/c/8658c75343ed00e5e154ebbe24335f51ba8db547
- https://git.kernel.org/stable/c/471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284
- https://git.kernel.org/stable/c/d40e3537265dea9e3c33021874437ff26dc18787
- https://git.kernel.org/stable/c/6dafa27764183738dc5368b669b71e3d0d154f12
- https://git.kernel.org/stable/c/56ec918e6c86c1536870e4373e91eddd0c44245f
- https://git.kernel.org/stable/c/2d680b988656bb556c863d8b46d9b9096842bf3d
- https://git.kernel.org/stable/c/205028ebba838938d3b264dda1d0708fa7fe1ade
- https://git.kernel.org/stable/c/f13abc1e8e1a3b7455511c4e122750127f6bc9b0
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-2025-23138 · CVE Program
- CVE-2025-23138 · NVD
- FIRST EPSS
- GHSA-9ccw-6g9x-96r5 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-23138 · 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