7.8

CVE-2026-45852: RDMA/rxe: Fix double free in rxe_srq_from_init

Modified
AliasesUBUNTU-CVE-2026-45852DEBIAN-CVE-2026-45852
Published 27-05-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-45852 is a high (CVSS 7.8) Double Free vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 58 · Related 42
LSN-0122-1OPENSUSE-SU-2026:20965-1RHSA-2026:25120RHSA-2026:25121RHSA-2026:25217RHSA-2026:27713

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability 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

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-134.134
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < b98ab5494dbd48652561aa0b9c32f10500220745 | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < d493e0bfc748a520c349d6c8791b262aa5ad2e4e | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 9abff51163aa1bc275ec356f74fe976291860a7f | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 26793db60925df1e88a29466813d586cbc190b8c | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < ce6f8e007682f378279d4cf83b240f12d52c723b | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 5c07aef09a121a4cd622a71eb0753a9e135c84a8 | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 26a9cfe12f4ffdeaa136f252478986fa5f397ddc | ≥ aae0484e15f062ad2c2502e68e15dfb8b8f84608, < 0beefd0e15d962f497aad750b2d5e9c3570b66d1 | 350703fae672d4d649c3562c199eab5ec9dc7c79 | ≥ 4.19.86, < 4.20 | 4.20
  • linux_kernel≥ 4.19.86, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.14 | ≥ 6.19, < 6.19.4
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.18.14-1

3 vendors · 159 products

References

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