{"api_version":"1","generated_at":"2026-10-31T00:38:33+00:00","cve":"CVE-2026-99188","urls":{"html":"https://cve.report/CVE-2026-99188","api":"https://cve.report/api/cve/CVE-2026-99188.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99188","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99188"},"summary":{"title":"net: stmmac: dwmac1000: clear the RGMII status interrupt","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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-28 11:17:39","updated_at":"2026-10-28 11:17:39"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/aa07285705f8d5bac464eb1c5b7412f8e88b91e1","name":"https://git.kernel.org/stable/c/aa07285705f8d5bac464eb1c5b7412f8e88b91e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/affc6d572935282ef9ab1e0b790cbc31e5ad8bca","name":"https://git.kernel.org/stable/c/affc6d572935282ef9ab1e0b790cbc31e5ad8bca","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99188","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99188","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e2c878a314175a4c3b76ee3be455f543438f472 affc6d572935282ef9ab1e0b790cbc31e5ad8bca git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e2c878a314175a4c3b76ee3be455f543438f472 aa07285705f8d5bac464eb1c5b7412f8e88b91e1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.13 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"affc6d572935282ef9ab1e0b790cbc31e5ad8bca","status":"affected","version":"2e2c878a314175a4c3b76ee3be455f543438f472","versionType":"git"},{"lessThan":"aa07285705f8d5bac464eb1c5b7412f8e88b91e1","status":"affected","version":"2e2c878a314175a4c3b76ee3be455f543438f472","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.13","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-28T10:35:45.591Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/affc6d572935282ef9ab1e0b790cbc31e5ad8bca"},{"url":"https://git.kernel.org/stable/c/aa07285705f8d5bac464eb1c5b7412f8e88b91e1"}],"title":"net: stmmac: dwmac1000: clear the RGMII status interrupt","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99188","datePublished":"2026-10-28T10:35:45.591Z","dateReserved":"2026-09-25T10:25:14.400Z","dateUpdated":"2026-10-28T10:35:45.591Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-28 11:17:39","lastModifiedDate":"2026-10-28 11:17:39","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99188","Ordinal":"1","Title":"net: stmmac: dwmac1000: clear the RGMII status interrupt","CVE":"CVE-2026-99188","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99188","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"net: stmmac: dwmac1000: clear the RGMII status interrupt"}]}}}