# CVE-2025-38183: net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()

CVE-2025-38183 is fixed in 28 products on 1 platform, first by DEBIAN-CVE-2025-38183, released July 4, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-38183
- Priority: High
- CVSS: 7.8 (Moderate)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 4, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38183

## Description

In the Linux kernel, the following vulnerability has been resolved:  net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()  Before calling lan743x_ptp_io_event_clock_get(), the 'channel' value is checked against the maximum value of PCI11X1X_PTP_IO_MAX_CHANNELS(8). This seems correct and aligns with the PTP interrupt status register (PTP_INT_STS) specifications.  However, lan743x_ptp_io_event_clock_get() writes to ptp->extts[] with only LAN743X_PTP_N_EXTTS(4) elements, using channel as an index:      lan743x_ptp_io_event_clock_get(..., u8 channel,...)     {         ...         /* Update Local timestamp */         extts = &ptp->extts[channel];         extts->ts.tv_sec = sec;         ...     }  To avoid an out-of-bounds write and utilize all the supported GPIO inputs, set LAN743X_PTP_N_EXTTS to 8.  Detected using the static analysis tool - Svace.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-64kb sles 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.11.1 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-azure opensuse-leap 15.6 | 6.4.0-150600.8.48.1 | [SUSE-SU-2025:02969-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02969-1.md) | Aug 25, 2025 |
| Linux | kernel-azure sles 15.6 | 6.4.0-150600.8.48.1 | [SUSE-SU-2025:02969-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02969-1.md) | Aug 25, 2025 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.20.11.1 | [SUSE-SU-2025:03011-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03011-1.md) | Aug 28, 2025 |
| Linux | kernel-coco sles 15.6 | 6.4.0-15061.28.coco15sp6.1 | [SUSE-SU-2025:02923-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02923-1.md) | Aug 20, 2025 |
| Linux | kernel-coco_debug sles 15.6 | 6.4.0-15061.28.coco15sp6.1 | [SUSE-SU-2025:02923-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02923-1.md) | Aug 20, 2025 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.11.1 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.65.1.150600.12.28.4 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.65.1.150600.12.28.4 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.11.1.150700.17.9.4 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.11.3 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-livepatch-SLE15-SP6-RT_Update_14 sles 15.6 | 1-150600.1.5.1 | [SUSE-SU-2025:03023-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03023-1.md) | Aug 29, 2025 |
| Linux | kernel-livepatch-SLE15-SP6_Update_14 sles 15.6 | 1-150600.13.3.4 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_3 sles 15.7 | 1-150700.1.5.1 | [SUSE-SU-2025:02853-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02853-1.md) | Aug 18, 2025 |
| Linux | kernel-livepatch-SLE15-SP7_Update_3 sles 15.7 | 1-150700.15.3.4 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.11.1 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-rt opensuse-leap 15.6 | 6.4.0-150600.10.49.1 | [SUSE-SU-2025:03023-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03023-1.md) | Aug 29, 2025 |
| Linux | kernel-rt_debug opensuse-leap 15.6 | 6.4.0-150600.10.49.1 | [SUSE-SU-2025:03023-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03023-1.md) | Aug 29, 2025 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.11.1 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-source-azure opensuse-leap 15.6 | 6.4.0-150600.8.48.1 | [SUSE-SU-2025:02969-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02969-1.md) | Aug 25, 2025 |
| Linux | kernel-source-azure sles 15.6 | 6.4.0-150600.8.48.1 | [SUSE-SU-2025:02969-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02969-1.md) | Aug 25, 2025 |
| Linux | kernel-source-azure sles 15.7 | 6.4.0-150700.20.11.1 | [SUSE-SU-2025:03011-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03011-1.md) | Aug 28, 2025 |
| Linux | kernel-source-coco sles 15.6 | 6.4.0-15061.28.coco15sp6.1 | [SUSE-SU-2025:02923-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02923-1.md) | Aug 20, 2025 |
| Linux | kernel-source-rt opensuse-leap 15.6 | 6.4.0-150600.10.49.1 | [SUSE-SU-2025:03023-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03023-1.md) | Aug 29, 2025 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.11.1 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | kernel-syms-azure opensuse-leap 15.6 | 6.4.0-150600.8.48.1 | [SUSE-SU-2025:02969-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02969-1.md) | Aug 25, 2025 |
| Linux | kernel-syms-azure sles 15.6 | 6.4.0-150600.8.48.1 | [SUSE-SU-2025:02969-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02969-1.md) | Aug 25, 2025 |
| Linux | kernel-syms-azure sles 15.7 | 6.4.0-150700.20.11.1 | [SUSE-SU-2025:03011-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03011-1.md) | Aug 28, 2025 |
| Linux | kernel-syms-coco sles 15.6 | 6.4.0-15061.28.coco15sp6.1 | [SUSE-SU-2025:02923-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02923-1.md) | Aug 20, 2025 |
| Linux | kernel-syms-rt opensuse-leap 15.6 | 6.4.0-150600.10.49.1 | [SUSE-SU-2025:03023-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03023-1.md) | Aug 29, 2025 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-zfcpdump sles 15.6 | 6.4.0-150600.23.65.1 | [SUSE-SU-2025:02996-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02996-1.md) | Aug 27, 2025 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.11.1 | [SUSE-SU-2025:02997-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02997-1.md) | Aug 27, 2025 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.147-1 | [DEBIAN-CVE-2025-38183](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38183.md) | Jul 4, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.35-1 | [DEBIAN-CVE-2025-38183](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38183.md) | Jul 4, 2025 |
| Linux | linux Debian 14 | 6.12.35-1 | [DEBIAN-CVE-2025-38183](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38183.md) | Jul 4, 2025 |

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