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.
Product status
60942c397af6094c04406b77982314dfe69ef3c4 (git) before e8d48201a132f4aab31351c19a802c5a5ae820fa
60942c397af6094c04406b77982314dfe69ef3c4 (git) before 66bba1fd5bad548c03f7e42669a59f3f4d8211cc
60942c397af6094c04406b77982314dfe69ef3c4 (git) before 41017bd66c533f7af912c58273c7dfd5de0065d4
60942c397af6094c04406b77982314dfe69ef3c4 (git) before 4da0d23516857230b8e9b3022e25422ee2e2ba80
60942c397af6094c04406b77982314dfe69ef3c4 (git) before e353b0854d3a1a31cb061df8d022fbfea53a0f24
5.18
Any version before 5.18
6.1.142 (semver)
6.6.95 (semver)
6.12.35 (semver)
6.15.4 (semver)
6.16 (original_commit_for_fix)
References
lists.debian.org/debian-lts-announce/2025/10/msg00008.html
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