{"id":"CVE-2026-99188","aliases":[],"title":"net: stmmac: dwmac1000: clear the RGMII status interrupt","titleSource":"Linux","descriptionSource":"Linux","products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"2e2c878a314175a4c3b76ee3be455f543438f472","status":"affected","lessThan":"affc6d572935282ef9ab1e0b790cbc31e5ad8bca","versionType":"git"},{"version":"2e2c878a314175a4c3b76ee3be455f543438f472","status":"affected","lessThan":"aa07285705f8d5bac464eb1c5b7412f8e88b91e1","versionType":"git"}],"defaultStatus":"unaffected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99188"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99188"}],"remediation":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: dwmac1000: clear the RGMII status interrupt\n\nSince commit 2e2c878a3141 (\"net: stmmac: remove SGMII/RGMII/SMII\ninterrupt handling\") nothing on the RGMII path reads GMAC_RGSMIIIS, so\nRGSMIIIS stays pending behind GMAC_INT_MASK from the first link change\non. stmmac_resume() resets the MAC in stmmac_hw_setup(); the reset sets\nGMAC_INT_MASK to 0 until dwmac1000_core_init() writes the mask again,\nand the pending status storms the line:\n\n  dwmac_dma_interrupt: unexpected status 04000000\n\nA register dump at the first message on ODROID-HC4 showed it:\n\n  core int_status 00000001 int_mask 00000000 pmt 00000000 rgsmiiis 0000000d\n\nWhen the resume thread runs on the CPU that takes the MAC interrupt,\nthe storm starves it: a soft lockup, then a watchdog reset or a hang.\n\nRead GMAC_RGSMIIIS in dwmac1000_irq_status() when the status is not\nmasked, as the driver did before 2e2c878a3141; the read clears it.\n\nWake-on-LAN resume from s2idle with the resume thread and the MAC\ninterrupt on one CPU: Helios64 (dwmac-rk), 7.3-rc6, soft-locked in 3 of\n3 resumes without a fix and in 0 of 10 with this patch; it ran with an\nout-of-tree dwmac-rk change that keeps the GMAC powered across suspend.\nODROID-HC4 (dwmac-meson8b): 0 of 10 with this patch, 2 of 2 without a\nfix on a 7.3-rc5 build. irq_rgmii_n went up by one per resume.","severity":"unknown","score":null,"published":"2026-10-28T10:35:45.591Z","modified":"2026-10-28T10:35:45.591Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://git.kernel.org/stable/c/affc6d572935282ef9ab1e0b790cbc31e5ad8bca","https://git.kernel.org/stable/c/aa07285705f8d5bac464eb1c5b7412f8e88b91e1"],"sources":[{"name":"CVE","id":"CVE-2026-99188","modified":"2026-10-28T10:35:45.591Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99188"}],"assessments":[],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T19:10:31.056Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}