7.8

CVE-2026-45852

RDMA/rxe: Fix double free in rxe_srq_from_init

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.19.86 < 5.10.259
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.210
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.176
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.128
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.75
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.14
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.071
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7 1 5.9
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-415 Double Free

The product calls free() twice on the same memory address.

https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c
Patch
https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b
Patch
https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8
Patch
https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc
Patch
https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1
Patch
https://git.kernel.org/stable/c/9abff51163aa1bc275ec356f74fe976291860a7f
Patch
https://git.kernel.org/stable/c/b98ab5494dbd48652561aa0b9c32f10500220745
Patch
https://git.kernel.org/stable/c/d493e0bfc748a520c349d6c8791b262aa5ad2e4e
Patch
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-2026:25217
https://access.redhat.com/errata/RHSA-2026:25120
https://access.redhat.com/errata/RHSA-2026:25121
https://access.redhat.com/errata/RHSA-2026:34094
https://access.redhat.com/errata/RHSA-2026:35863
https://access.redhat.com/errata/RHSA-2026:35896
https://access.redhat.com/errata/RHSA-2026:27713
https://access.redhat.com/errata/RHSA-2026:33899
https://access.redhat.com/errata/RHSA-2026:35844
https://access.redhat.com/security/cve/CVE-2026-45852