CVE-2026-45852RDMA/rxe: Fix double free in rxe_srq_from_init
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-1341
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before b98ab5494dbd48652561aa0b9c32f10500220745; from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before d493e0bfc748a520c349d6c8791b262aa5ad2e4e; from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 9abff51163aa1bc275ec356f74fe976291860a7f; from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 26793db60925df1e88a29466813d586cbc190b8c; from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before ce6f8e007682f378279d4cf83b240f12d52c723b; from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 5c07aef09a121a4cd622a71eb0753a9e135c84a8; from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 26a9cfe12f4ffdeaa136f252478986fa5f397ddc; from aae0484e15f062ad2c2502e68e15dfb8b8f84608 before 0beefd0e15d962f497aad750b2d5e9c3570b66d1; and 2 more ranges | CNA record |
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support redhat:rhel_extras_rt_els | from 0:3.10.0-1160.155.1.rt56.1307.el7 not affected | CISA ADP |
from 0:3.10.0-1160.154.1.el7 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 8 redhat:enterprise_linux | from 0:4.18.0-553.132.1.rt7.473.el8_10 not affected | CISA ADP |
from 0:4.18.0-305.197.1.el8_4 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On redhat:rhel_eus_long_life | from 0:4.18.0-305.197.1.el8_4 not affected | CISA ADP |
from 0:4.18.0-477.150.1.el8_8 not affected | CISA ADP | |
from 0:4.18.0-477.150.1.el8_8 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:5.14.0-570.125.1.el9_6 not affected | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.19.86 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4 | NVD |
References
- https://git.kernel.org/stable/c/b98ab5494dbd48652561aa0b9c32f10500220745patch
- https://git.kernel.org/stable/c/d493e0bfc748a520c349d6c8791b262aa5ad2e4epatch
- https://git.kernel.org/stable/c/9abff51163aa1bc275ec356f74fe976291860a7fpatch
- https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8cpatch
- https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723bpatch
- https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8patch
- https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddcpatch
- https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1patch
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.