CVE-2025-38183

net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()

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.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/e8d48201a132f4aab31351c19a802c5a5ae820fa
https://git.kernel.org/stable/c/66bba1fd5bad548c03f7e42669a59f3f4d8211cc
https://git.kernel.org/stable/c/41017bd66c533f7af912c58273c7dfd5de0065d4
https://git.kernel.org/stable/c/4da0d23516857230b8e9b3022e25422ee2e2ba80
https://git.kernel.org/stable/c/e353b0854d3a1a31cb061df8d022fbfea53a0f24

Frequently Asked Questions

What is the severity of CVE-2025-38183?: CVE-2025-38183 has not yet been assigned a CVSS score.
How to fix CVE-2025-38183?: To fix CVE-2025-38183, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-38183 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-38183 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-38183?: CVE-2025-38183 affects Linux Linux, Linux Linux.

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