GHSA-8GP2-FHH5-VXHW
Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-24 18:31In the Linux kernel, the following vulnerability has been resolved:
RDMA/counter: Fix num_counters leak on bind_qp failure in alloc_and_bind()
When __rdma_counter_bind_qp() fails in alloc_and_bind(), the error path jumps to err_mode which frees the counter without decrementing port_counter->num_counters. The only place that decrements is rdma_counter_free(), which is unreachable since the counter was never successfully bound.
This leak accumulates across repeated failures, permanently preventing the port from switching to AUTO mode (-EBUSY in __counter_set_mode()) and blocking the MANUAL→NONE auto-revert in rdma_counter_free(). When the mode was NONE before the call, the MANUAL mode set by __counter_set_mode() also leaks since the revert logic is never reached.
Add an err_bind label between the num_counters increment and the existing err_mode label. It decrements num_counters and mirrors the MANUAL→NONE revert from rdma_counter_free(), ensuring the port state is fully restored on bind failure.
{
"affected": [],
"aliases": [
"CVE-2026-97477"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-24T17:17:25Z",
"severity": null
},
"details": "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 which frees the counter without decrementing\nport_counter-\u003enum_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\u2192NONE 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\u2192NONE revert from rdma_counter_free(), ensuring the port state\nis fully restored on bind failure.",
"id": "GHSA-8gp2-fhh5-vxhw",
"modified": "2026-09-24T18:31:34Z",
"published": "2026-09-24T18:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97477"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4fbc8230009f5b1bcd13cc74c5a6a43ddba141fd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/da95cb016812c0e012ea839f191926e35ca8f57f"
}
],
"schema_version": "1.4.0",
"severity": []
}
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