Description
In 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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < b98ab5494dbd48652561aa0b9c32f10500220745; >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < d493e0bfc748a520c349d6c8791b262aa5ad2e4e; >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 9abff51163aa1bc275ec356f74fe976291860a7f; >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 26793db60925df1e88a29466813d586cbc190b8c; >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < ce6f8e007682f378279d4cf83b240f12d52c723b; >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 5c07aef09a121a4cd622a71eb0753a9e135c84a8; >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 26a9cfe12f4ffdeaa136f252478986fa5f397ddc; >= aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 0beefd0e15d962f497aad750b2d5e9c3570b66d1; 350703fae672d4d649c3562c199eab5ec9dc7c79; >= 4.19.86, < 4.20 |
| Linux | Linux | 4.20 |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 6 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
References
- https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1Patch
- https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8cPatch
- https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddcPatch
- https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8Patch
- https://git.kernel.org/stable/c/9abff51163aa1bc275ec356f74fe976291860a7fPatch
- https://git.kernel.org/stable/c/b98ab5494dbd48652561aa0b9c32f10500220745Patch
- https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723bPatch
- https://git.kernel.org/stable/c/d493e0bfc748a520c349d6c8791b262aa5ad2e4ePatch
- https://access.redhat.com/errata/RHSA-2026:25120
- https://access.redhat.com/errata/RHSA-2026:25121
- https://access.redhat.com/errata/RHSA-2026:25217
- https://access.redhat.com/errata/RHSA-2026:27713
- https://access.redhat.com/errata/RHSA-2026:33899
- https://access.redhat.com/errata/RHSA-2026:34094
- https://access.redhat.com/errata/RHSA-2026:35844
- https://access.redhat.com/errata/RHSA-2026:35863
- https://access.redhat.com/errata/RHSA-2026:35896
- https://access.redhat.com/errata/RHSA-2026:41236
- https://access.redhat.com/security/cve/CVE-2026-45852
- https://bugzilla.redhat.com/show_bug.cgi?id=2482166
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45852.json
Timeline
- Published
- May 27, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified