CVE-2026-45852

Advisory lineage Upstream: 0 Downstream: 9
Awaiting Analysis
Published: 27 May 2026, 12:15
Last modified:30 May 2026, 10:45

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.16% LOW
0% probability +0.15%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 May 2026, 12:15
Published
Vulnerability first disclosed
30 May 2026, 10:45
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.16%• Percentile: 6%

Affected Systems

  • linux•linux

    ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 22b8c23a3b92d023614bb00896fe364b2c1a31d3 | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < af5956243018918130d52c9f671efdb40bab3366 | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < d286f0d4e3ad3caf5f0e673cdad7bf89bf37d947 | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 26793db60925df1e88a29466813d586cbc190b8c | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < ce6f8e007682f378279d4cf83b240f12d52c723b | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 5c07aef09a121a4cd622a71eb0753a9e135c84a8 | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 26a9cfe12f4ffdeaa136f252478986fa5f397ddc | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 0beefd0e15d962f497aad750b2d5e9c3570b66d1 | 350703fae672d4d649c3562c199eab5ec9dc7c79 | ≥ 4.19.86, < 4.20 | 4.20

References (8)