CVE-2026-45852

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
7.8
EG Score
7.8(medium)
EPSS
7.2%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 20, 2026

Advisory Details (8)

Auto-updated Jun 4, 2026
No patch confirmed yet.
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d286f0d4e3ad3caf5f0e673cdad7bf89bf37d947
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/af5956243018918130d52c9f671efdb40bab3366
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/22b8c23a3b92d023614bb00896fe364b2c1a31d3
generic

RDMA/rxe: Fix double free in rxe_srq_from_init - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1

Vendor Advisories for CVE-2026-45852(10)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:4.18.0-477.150.1.el8_82026-07-06redhat
redhatkernel-0:3.10.0-1160.154.1.el72026-07-06redhat
redhatkernel-0:4.18.0-305.197.1.el8_42026-07-06redhat
redhatkernel-0:4.18.0-372.198.1.el8_62026-07-01redhat
redhatkernel-0:5.14.0-570.125.1.el9_62026-07-01redhat
redhatkernel-0:5.14.0-427.134.1.el9_42026-06-22redhat
redhatkernel-0:5.14.0-687.15.1.el9_82026-06-11redhat
redhatkernel-rt-0:4.18.0-553.132.1.rt7.473.el8_102026-06-10redhat
redhatkernel-0:4.18.0-553.132.1.el8_102026-06-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 56× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 146 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 02:29 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 17:03 UTCEPSS rescore
  8. 2026-07-15 16:57 UTCEPSS rescore
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-13 22:30 UTCEPSS rescore
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-09 00:26 UTCVendor advisory
  16. 2026-07-09 00:26 UTCGHSA enrichment
  17. 2026-07-08 15:16 UTCEPSS rescore
  18. 2026-07-07 13:46 UTCEPSS rescore
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-01 15:07 UTCEPSS rescore
  24. 2026-07-01 11:38 UTCVendor advisory
  25. 2026-07-01 11:38 UTCGHSA enrichment
Show 75 more
  1. 2026-06-30 23:22 UTCEPSS rescore
  2. 2026-06-30 05:51 UTCVendor advisory
  3. 2026-06-30 05:51 UTCGHSA enrichment
  4. 2026-06-29 14:34 UTCVendor advisory
  5. 2026-06-29 14:34 UTCGHSA enrichment
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-29 14:06 UTCEPSS rescore
  8. 2026-06-28 21:25 UTCVendor advisory
  9. 2026-06-28 21:25 UTCGHSA enrichment
  10. 2026-06-28 14:07 UTCEPSS rescore
  11. 2026-06-28 06:53 UTCVendor advisory
  12. 2026-06-28 06:53 UTCGHSA enrichment
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-27 18:46 UTCVendor advisory
  16. 2026-06-27 18:46 UTCGHSA enrichment
  17. 2026-06-27 06:38 UTCVendor advisory
  18. 2026-06-27 06:37 UTCGHSA enrichment
  19. 2026-06-27 03:08 UTCEPSS rescore
  20. 2026-06-26 17:14 UTCVendor advisory
  21. 2026-06-26 17:13 UTCGHSA enrichment
  22. 2026-06-26 02:46 UTCVendor advisory
  23. 2026-06-26 02:46 UTCGHSA enrichment
  24. 2026-06-25 14:08 UTCVendor advisory
  25. 2026-06-25 14:08 UTCGHSA enrichment
  26. 2026-06-25 13:49 UTCEPSS rescore
  27. 2026-06-25 01:56 UTCVendor advisory
  28. 2026-06-25 01:56 UTCGHSA enrichment
  29. 2026-06-24 14:05 UTCEPSS rescore
  30. 2026-06-23 21:33 UTCEPSS rescore
  31. 2026-06-23 21:33 UTCEPSS rescore
  32. 2026-06-22 14:25 UTCEPSS rescore
  33. 2026-06-22 14:25 UTCEPSS rescore
  34. 2026-06-21 14:56 UTCEPSS rescore
  35. 2026-06-21 14:56 UTCEPSS rescore
  36. 2026-06-21 01:59 UTCEPSS rescore
  37. 2026-06-21 01:59 UTCEPSS rescore
  38. 2026-06-19 19:26 UTCEPSS rescore
  39. 2026-06-19 19:26 UTCEPSS rescore
  40. 2026-06-18 17:52 UTCEPSS rescore
  41. 2026-06-18 17:52 UTCEPSS rescore
  42. 2026-06-17 18:55 UTCVendor advisory
  43. 2026-06-17 18:55 UTCGHSA enrichment
  44. 2026-06-17 17:53 UTCEPSS rescore
  45. 2026-06-17 04:20 UTCVendor advisory
  46. 2026-06-17 04:20 UTCGHSA enrichment
  47. 2026-06-16 17:52 UTCEPSS rescore
  48. 2026-06-16 16:12 UTCVendor advisory
  49. 2026-06-16 16:12 UTCGHSA enrichment
  50. 2026-06-16 01:43 UTCVendor advisory
  51. 2026-06-16 01:43 UTCGHSA enrichment
  52. 2026-06-15 17:49 UTCEPSS rescore
  53. 2026-06-15 13:35 UTCVendor advisory
  54. 2026-06-15 13:35 UTCGHSA enrichment
  55. 2026-06-14 21:03 UTCVendor advisory
  56. 2026-06-14 21:03 UTCGHSA enrichment
  57. 2026-06-14 08:56 UTCVendor advisory
  58. 2026-06-14 08:55 UTCGHSA enrichment
  59. 2026-06-13 23:00 UTCEPSS rescore
  60. 2026-06-13 20:48 UTCVendor advisory
  61. 2026-06-13 20:48 UTCGHSA enrichment
  62. 2026-06-13 08:03 UTCVendor advisory
  63. 2026-06-13 08:03 UTCGHSA enrichment
  64. 2026-06-12 23:12 UTCEPSS rescore
  65. 2026-06-12 23:12 UTCEPSS rescore
  66. 2026-06-12 19:54 UTCVendor advisory
  67. 2026-06-12 19:54 UTCGHSA enrichment
  68. 2026-06-12 07:47 UTCVendor advisory
  69. 2026-06-12 07:47 UTCGHSA enrichment
  70. 2026-06-11 19:40 UTCVendor advisory
  71. 2026-06-11 19:40 UTCGHSA enrichment
  72. 2026-06-11 14:00 UTCEPSS rescore
  73. 2026-06-11 07:33 UTCVendor advisory
  74. 2026-06-11 07:33 UTCGHSA enrichment
  75. 2026-06-10 22:18 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-45852?
CVE-2026-45852 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix double free in rxesrqfrom_init In rxesrqfrom_init(), the queue pointer 'q' is assigned to 'srq->rq.queue' before copying the SRQ number to user space. If copytouser() fails, the function calls rxequeuecleanup() to…
When was CVE-2026-45852 disclosed?
CVE-2026-45852 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45852 actively exploited?
CVE-2026-45852 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45852?
CVE-2026-45852 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-45852?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45852, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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