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THREATINT
PUBLISHED

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.

Reserved 2025-04-16 | Published 2025-07-04 | Updated 2025-07-04 | Assigner Linux

Product status

Default status
unaffected

60942c397af6094c04406b77982314dfe69ef3c4 before e8d48201a132f4aab31351c19a802c5a5ae820fa
affected

60942c397af6094c04406b77982314dfe69ef3c4 before 66bba1fd5bad548c03f7e42669a59f3f4d8211cc
affected

60942c397af6094c04406b77982314dfe69ef3c4 before 41017bd66c533f7af912c58273c7dfd5de0065d4
affected

60942c397af6094c04406b77982314dfe69ef3c4 before 4da0d23516857230b8e9b3022e25422ee2e2ba80
affected

60942c397af6094c04406b77982314dfe69ef3c4 before e353b0854d3a1a31cb061df8d022fbfea53a0f24
affected

Default status
affected

5.18
affected

Any version before 5.18
unaffected

6.1.142
unaffected

6.6.95
unaffected

6.12.35
unaffected

6.15.4
unaffected

6.16-rc3
unaffected

References

git.kernel.org/...c/e8d48201a132f4aab31351c19a802c5a5ae820fa

git.kernel.org/...c/66bba1fd5bad548c03f7e42669a59f3f4d8211cc

git.kernel.org/...c/41017bd66c533f7af912c58273c7dfd5de0065d4

git.kernel.org/...c/4da0d23516857230b8e9b3022e25422ee2e2ba80

git.kernel.org/...c/e353b0854d3a1a31cb061df8d022fbfea53a0f24

cve.org (CVE-2025-38183)

nvd.nist.gov (CVE-2025-38183)

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