{"id":"CVE-2026-89510","title":"RDMA/cxgb4: Cancel reg_work before freeing device on remove","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Cancel reg_work before freeing device on remove\n\nc4iw_uld_state_change() queues reg_work to register the RDMA device.\nc4iw_remove() can free ctx->dev while …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-825"],"vendor":"Linux","product":"Linux","affected":["Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < e6e79e7be87c5ea92728060a3d7fb56890a91e45","Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 672ee1981db10569ec96030bddb322f18382ec04","Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 4681e731db07769846901cfabdd3e53f765eb9d3","Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 3265d558dfafab8f12f5fba06ebbf15cae9f3225","Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < fe9c591026c576d8b1f72aab5e4cd67350530763","Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 85f438382a865a4dc4c50e6b884310bb2b60fc4d","Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 320e5258a53af0abc5abd9eb01519a48bab2dee8","Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < a7100601aa1a39f799a566acce10db20eaf4b7f2","Linux 4.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:22:51.998964Z"},"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:48:01.638Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89510","references":[{"url":"https://git.kernel.org/stable/c/e6e79e7be87c5ea92728060a3d7fb56890a91e45"},{"url":"https://git.kernel.org/stable/c/672ee1981db10569ec96030bddb322f18382ec04"},{"url":"https://git.kernel.org/stable/c/4681e731db07769846901cfabdd3e53f765eb9d3"},{"url":"https://git.kernel.org/stable/c/3265d558dfafab8f12f5fba06ebbf15cae9f3225"},{"url":"https://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763"},{"url":"https://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d"},{"url":"https://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8"},{"url":"https://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89510.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89510"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532033"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89510"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89510"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89510.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00176,"epssPercentile":0.07082,"scores":{"cna":7.8,"vendor":7},"ingestedAt":"2026-09-14T15:23:07.452Z","slug":"CVE-2026-89510","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Cancel reg_work before freeing device on remove\n\nc4iw_uld_state_change() queues reg_work to register the RDMA device.\nc4iw_remove() can free ctx->dev while this work is pending or running,\nleaving c4iw_register_device() accessing the freed device.\n\nCancel reg_work before removing the device.  The registration work can\ntear down ctx->dev when registration fails, so do not unregister or\ndeallocate it again in that case.\n\nThis issue was found by an in-house static analysis tool.\n\n## Affected\n\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < e6e79e7be87c5ea92728060a3d7fb56890a91e45`\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 672ee1981db10569ec96030bddb322f18382ec04`\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 4681e731db07769846901cfabdd3e53f765eb9d3`\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 3265d558dfafab8f12f5fba06ebbf15cae9f3225`\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < fe9c591026c576d8b1f72aab5e4cd67350530763`\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 85f438382a865a4dc4c50e6b884310bb2b60fc4d`\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < 320e5258a53af0abc5abd9eb01519a48bab2dee8`\n- `Linux >= 1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5 < a7100601aa1a39f799a566acce10db20eaf4b7f2`\n- `Linux 4.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89510.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":223303,"id":"CVE-2026-89510","ts":1792180050789,"field":"cvss","old":"7","new":"7.8"},{"seq":202759,"id":"CVE-2026-89510","ts":1789403715746,"field":"cvss","old":"7.8","new":"7"},{"seq":197988,"id":"CVE-2026-89510","ts":1789384321271,"field":"cvss","old":"5.2","new":"7.8"},{"seq":197987,"id":"CVE-2026-89510","ts":1789384321271,"field":"severity","old":"medium","new":"high"},{"seq":183775,"id":"CVE-2026-89510","ts":1789356677337,"field":"cvss","old":"7.8","new":"5.2"},{"seq":183774,"id":"CVE-2026-89510","ts":1789356677337,"field":"severity","old":"high","new":"medium"},{"seq":153302,"id":"CVE-2026-89510","ts":1789285349954,"field":"cvss","old":null,"new":"7.8"},{"seq":153301,"id":"CVE-2026-89510","ts":1789285349954,"field":"severity","old":"none","new":"high"},{"seq":109646,"id":"CVE-2026-89510","ts":1789183732775,"field":"cvss","old":null,"new":"5.2"},{"seq":109645,"id":"CVE-2026-89510","ts":1789183732775,"field":"severity","old":"none","new":"medium"}]}