Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before b98ab5494dbd48652561aa0b9c32f10500220745; affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before d493e0bfc748a520c349d6c8791b262aa5ad2e4e; affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 9abff51163aa1bc275ec356f74fe976291860a7f; affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 26793db60925df1e88a29466813d586cbc190b8c; affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before ce6f8e007682f378279d4cf83b240f12d52c723b; affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 5c07aef09a121a4cd622a71eb0753a9e135c84a8; affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 26a9cfe12f4ffdeaa136f252478986fa5f397ddc; affected aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 0beefd0e15d962f497aad750b2d5e9c3570b66d1; affected 350703fae672d4d649c3562c199eab5ec9dc7c79; affected 4.19.86 before 4.20 |
| Linux / Linux | affected 4.20; unaffected 0 before 4.20; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.14 through 6.18.*; unaffected 6.19.4 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b98ab5494dbd48652561aa0b9c32f10500220745
- https://git.kernel.org/stable/c/d493e0bfc748a520c349d6c8791b262aa5ad2e4e
- https://git.kernel.org/stable/c/9abff51163aa1bc275ec356f74fe976291860a7f
- https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c
- https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b
- https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8
- https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc
- https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1
ADP enrichment
A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) subsystem, specifically within the `rxe` driver. An error in the `rxe_srq_from_init` function's memory management can lead to a double free vulnerability. This occurs when an attempt to copy data to user space fails, causing the same memory region to be freed twice. A local attacker could potentially exploit this flaw to cause a denial of service (DoS) by crashing the system.
- 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
- https://access.redhat.com/errata/RHSA-2026:35844
- https://access.redhat.com/errata/RHSA-2026:41236
- https://access.redhat.com/errata/RHSA-2026:27713
- https://access.redhat.com/errata/RHSA-2026:34094
- https://access.redhat.com/errata/RHSA-2026:25217
- https://access.redhat.com/errata/RHSA-2026:25121
- https://access.redhat.com/errata/RHSA-2026:35896
- https://access.redhat.com/errata/RHSA-2026:33899
- https://access.redhat.com/errata/RHSA-2026:35863
- https://access.redhat.com/errata/RHSA-2026:25120
No English description supplied.
No references supplied.