{"id":"CVE-2026-97477","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/counter: Fix num_counters leak on bind_qp failure in alloc_and_bind()\n\nWhen __rdma_counter_bind_qp() fails in alloc_and_bind(), the error path\njumps to err_mode wh…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/counter: Fix num_counters leak on bind_qp failure in alloc_and_bind()\n\nWhen __rdma_counter_bind_qp() fails in alloc_and_bind(), the error path\njumps to err_mode wh…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < da95cb016812c0e012ea839f191926e35ca8f57f","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4fbc8230009f5b1bcd13cc74c5a6a43ddba141fd","Linux < 6.18.53","Linux (all versions)"],"published":"2026-09-24","updated":"2026-09-28","sourceUpdated":"2026-09-28T06:16:33.607","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97477","references":[{"url":"https://git.kernel.org/stable/c/4fbc8230009f5b1bcd13cc74c5a6a43ddba141fd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/da95cb016812c0e012ea839f191926e35ca8f57f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97477.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97477"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540531"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97477"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97477"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97477.mbox"},{"url":"https://git.kernel.org/stable/c/7c9fee40fc8d8d928f44e99bc6e6adf93f9f2c2a"},{"url":"https://git.kernel.org/stable/c/1bcdeddddffadff9993657f6b0e5535d66ebd10f"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00174,"epssPercentile":0.06842,"ingestedAt":"2026-09-24T16:47:15.872Z","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-911"],"slug":"CVE-2026-97477","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/counter: Fix num_counters leak on bind_qp failure in alloc_and_bind()\n\nWhen __rdma_counter_bind_qp() fails in alloc_and_bind(), the error path\njumps to err_mode which frees the counter without decrementing\nport_counter->num_counters. The only place that decrements is\nrdma_counter_free(), which is unreachable since the counter was never\nsuccessfully bound.\n\nThis leak accumulates across repeated failures, permanently preventing\nthe port from switching to AUTO mode (-EBUSY in __counter_set_mode())\nand blocking the MANUAL→NONE auto-revert in rdma_counter_free(). When\nthe mode was NONE before the call, the MANUAL mode set by\n__counter_set_mode() also leaks since the revert logic is never\nreached.\n\nAdd an err_bind label between the num_counters increment and the\nexisting err_mode label. It decrements num_counters and mirrors the\nMANUAL→NONE revert from rdma_counter_free(), ensuring the port state\nis fully restored on bind failure.\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** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97477.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213475,"id":"CVE-2026-97477","ts":1790754735833,"field":"cvss","old":null,"new":"5.5"},{"seq":213474,"id":"CVE-2026-97477","ts":1790754735833,"field":"severity","old":"none","new":"medium"}]}