{"id":"CVE-2026-97963","state":"PUBLISHED","title":"net: stmmac: initialize ptp_lock at probe time","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: initialize ptp_lock at probe time\n\npriv->ptp_lock is only initialized in stmmac_ptp_register(), which runs\nduring __stmmac_open(). However, the lock is also used while the\ninterface is down and has never been opened: tc_taprio_configure()\ninvokes the PTP gettime64() callback to compute the EST base time when\noffloading a TAPRIO schedule, and stmmac_get_time() takes\npriv->ptp_lock. Using an uninitialized rwlock is undefined behaviour.\nMove the rwlock_init() to __stmmac_dvr_probe(), together with the other\nprivate locks, so that ptp_lock is always valid regardless of the\ninterface state.","publishedAt":"2026-09-25T10:23:06.749Z","updatedAt":"2026-10-19T09:11:29.173Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"ee33e424d4932c70f103b94a46b685923f236f65","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"7ced87834f3a58761d4bbcabf8326478548e6a54","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"79fb5bcc50996964e076dffbdc24b7d2c06bd957","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"420315413b29635de1d4ea4142e410e6465260f3","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"25cc0096efba83b4e0e6fa50f03e9543b41e9d3d","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"b1986595cf827c38ff929e22fbc9ca8f76379306","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"0338c68e22abd2ee509ec2e32508a50896618c32","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/stmicro/stmmac/stmmac_main.c","drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/stmicro/stmmac/stmmac_main.c","drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"]}],"references":["https://git.kernel.org/stable/c/ee33e424d4932c70f103b94a46b685923f236f65","https://git.kernel.org/stable/c/7ced87834f3a58761d4bbcabf8326478548e6a54","https://git.kernel.org/stable/c/79fb5bcc50996964e076dffbdc24b7d2c06bd957","https://git.kernel.org/stable/c/420315413b29635de1d4ea4142e410e6465260f3","https://git.kernel.org/stable/c/25cc0096efba83b4e0e6fa50f03e9543b41e9d3d","https://git.kernel.org/stable/c/b1986595cf827c38ff929e22fbc9ca8f76379306","https://git.kernel.org/stable/c/0338c68e22abd2ee509ec2e32508a50896618c32"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97963.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97963","state":"PUBLISHED","datePublished":"2026-09-25T10:23:06.749Z","dateUpdated":"2026-10-19T09:11:29.173Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:18:58.206Z"},"containers":{"cna":{"title":"net: stmmac: initialize ptp_lock at probe time","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: initialize ptp_lock at probe time\n\npriv->ptp_lock is only initialized in stmmac_ptp_register(), which runs\nduring __stmmac_open(). However, the lock is also used while the\ninterface is down and has never been opened: tc_taprio_configure()\ninvokes the PTP gettime64() callback to compute the EST base time when\noffloading a TAPRIO schedule, and stmmac_get_time() takes\npriv->ptp_lock. Using an uninitialized rwlock is undefined behaviour.\nMove the rwlock_init() to __stmmac_dvr_probe(), together with the other\nprivate locks, so that ptp_lock is always valid regardless of the\ninterface state."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"ee33e424d4932c70f103b94a46b685923f236f65","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"7ced87834f3a58761d4bbcabf8326478548e6a54","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"79fb5bcc50996964e076dffbdc24b7d2c06bd957","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"420315413b29635de1d4ea4142e410e6465260f3","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"25cc0096efba83b4e0e6fa50f03e9543b41e9d3d","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"b1986595cf827c38ff929e22fbc9ca8f76379306","versionType":"git"},{"version":"b60189e0392fa06348911077ef281eb2b1047b6a","status":"affected","lessThan":"0338c68e22abd2ee509ec2e32508a50896618c32","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/stmicro/stmmac/stmmac_main.c","drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/stmicro/stmmac/stmmac_main.c","drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ee33e424d4932c70f103b94a46b685923f236f65"},{"url":"https://git.kernel.org/stable/c/7ced87834f3a58761d4bbcabf8326478548e6a54"},{"url":"https://git.kernel.org/stable/c/79fb5bcc50996964e076dffbdc24b7d2c06bd957"},{"url":"https://git.kernel.org/stable/c/420315413b29635de1d4ea4142e410e6465260f3"},{"url":"https://git.kernel.org/stable/c/25cc0096efba83b4e0e6fa50f03e9543b41e9d3d"},{"url":"https://git.kernel.org/stable/c/b1986595cf827c38ff929e22fbc9ca8f76379306"},{"url":"https://git.kernel.org/stable/c/0338c68e22abd2ee509ec2e32508a50896618c32"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:11:29.173Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}