CVE-2025-38183

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux60942c397af6094c04406b77982314dfe69ef3c4 < e8d48201a132f4aab31351c19a802c5a5ae820faaffected
LinuxLinux60942c397af6094c04406b77982314dfe69ef3c4 < 66bba1fd5bad548c03f7e42669a59f3f4d8211ccaffected
LinuxLinux60942c397af6094c04406b77982314dfe69ef3c4 < 41017bd66c533f7af912c58273c7dfd5de0065d4affected
LinuxLinux60942c397af6094c04406b77982314dfe69ef3c4 < 4da0d23516857230b8e9b3022e25422ee2e2ba80affected
LinuxLinux60942c397af6094c04406b77982314dfe69ef3c4 < e353b0854d3a1a31cb061df8d022fbfea53a0f24affected
LinuxLinux5.18affected
LinuxLinux0 < 5.18unaffected
LinuxLinux6.1.142 <= 6.1.*unaffected
LinuxLinux6.6.95 <= 6.6.*unaffected
LinuxLinux6.12.35 <= 6.12.*unaffected
LinuxLinux6.15.4 <= 6.15.*unaffected
LinuxLinux6.16 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

References