GHSA-M5RC-6P5X-73GP
Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Fix double free in rxe_srq_from_init
In rxe_srq_from_init(), the queue pointer 'q' is assigned to 'srq->rq.queue' before copying the SRQ number to user space. If copy_to_user() fails, the function calls rxe_queue_cleanup() to free the queue, but leaves the now-invalid pointer in 'srq->rq.queue'.
The caller of rxe_srq_from_init() (rxe_create_srq) eventually calls rxe_srq_cleanup() upon receiving the error, which triggers a second rxe_queue_cleanup() on the same memory, leading to a double free.
The call trace looks like this: kmem_cache_free+0x.../0x... rxe_queue_cleanup+0x1a/0x30 [rdma_rxe] rxe_srq_cleanup+0x42/0x60 [rdma_rxe] rxe_elem_release+0x31/0x70 [rdma_rxe] rxe_create_srq+0x12b/0x1a0 [rdma_rxe] ib_create_srq_user+0x9a/0x150 [ib_core]
Fix this by moving 'srq->rq.queue = q' after copy_to_user.
{
"affected": [],
"aliases": [
"CVE-2026-45852"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-27T14:16:57Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix double free in rxe_srq_from_init\n\nIn rxe_srq_from_init(), the queue pointer \u0027q\u0027 is assigned to\n\u0027srq-\u003erq.queue\u0027 before copying the SRQ number to user space.\nIf copy_to_user() fails, the function calls rxe_queue_cleanup()\nto free the queue, but leaves the now-invalid pointer in\n\u0027srq-\u003erq.queue\u0027.\n\nThe caller of rxe_srq_from_init() (rxe_create_srq) eventually\ncalls rxe_srq_cleanup() upon receiving the error, which triggers\na second rxe_queue_cleanup() on the same memory, leading to a\ndouble free.\n\nThe call trace looks like this:\n kmem_cache_free+0x.../0x...\n rxe_queue_cleanup+0x1a/0x30 [rdma_rxe]\n rxe_srq_cleanup+0x42/0x60 [rdma_rxe]\n rxe_elem_release+0x31/0x70 [rdma_rxe]\n rxe_create_srq+0x12b/0x1a0 [rdma_rxe]\n ib_create_srq_user+0x9a/0x150 [ib_core]\n\nFix this by moving \u0027srq-\u003erq.queue = q\u0027 after copy_to_user.",
"id": "GHSA-m5rc-6p5x-73gp",
"modified": "2026-05-27T15:33:13Z",
"published": "2026-05-27T15:33:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45852"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/22b8c23a3b92d023614bb00896fe364b2c1a31d3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/af5956243018918130d52c9f671efdb40bab3366"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d286f0d4e3ad3caf5f0e673cdad7bf89bf37d947"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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