CVE-2023-52451

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-02-22. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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:

powerpc/pseries/memhp: Fix access beyond end of drmem array

dlpar_memory_remove_by_index() may access beyond the bounds of the drmem lmb array when the LMB lookup fails to match an entry with the given DRC index. When the search fails, the cursor is left pointing to &drmem_info->lmbs[drmem_info->n_lmbs], which is one element past the last valid entry in the array. The debug message at the end of the function then dereferences this pointer:

pr_debug("Failed to hot-remove memory at %llx\n", lmb->base_addr);

This was found by inspection and confirmed with KASAN:

pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 1234 ================================================================== BUG: KASAN: slab-out-of-bounds in dlpar_memory+0x298/0x1658 Read of size 8 at addr c000000364e97fd0 by task bash/949

dump_stack_lvl+0xa4/0xfc (unreliable) print_report+0x214/0x63c kasan_report+0x140/0x2e0 __asan_load8+0xa8/0xe0 dlpar_memory+0x298/0x1658 handle_dlpar_errorlog+0x130/0x1d0 dlpar_store+0x18c/0x3e0 kobj_attr_store+0x68/0xa0 sysfs_kf_write+0xc4/0x110 kernfs_fop_write_iter+0x26c/0x390 vfs_write+0x2d4/0x4e0 ksys_write+0xac/0x1a0 system_call_exception+0x268/0x530 system_call_vectored_common+0x15c/0x2ec

Allocated by task 1: kasan_save_stack+0x48/0x80 kasan_set_track+0x34/0x50 kasan_save_alloc_info+0x34/0x50 __kasan_kmalloc+0xd0/0x120 __kmalloc+0x8c/0x320 kmalloc_array.constprop.0+0x48/0x5c drmem_init+0x2a0/0x41c do_one_initcall+0xe0/0x5c0 kernel_init_freeable+0x4ec/0x5a0 kernel_init+0x30/0x1e0 ret_from_kernel_user_thread+0x14/0x1c

The buggy address belongs to the object at c000000364e80000 which belongs to the cache kmalloc-128k of size 131072 The buggy address is located 0 bytes to the right of allocated 98256-byte region [c000000364e80000, c000000364e97fd0)

================================================================== pseries-hotplug-mem: Failed to hot-remove memory at 0

Log failed lookups with a separate message and dereference the cursor only when it points to a valid entry.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
16.0%
KEV
Not listed

Published

February 22, 2024

Last Modified

November 21, 2024

References (17)

Vendor Advisories for CVE-2023-52451(3)

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

Patch Availability(20)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.176.174) @ focal2026-05-24ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1057.58) @ jammy2026-05-24ubuntu
ubuntulinux-tools-iot (5.4.0.1034.32) @ focal2026-05-24ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1041 (5.4.0-1041.45) @ focal2026-05-24ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.253.259) @ xenial2026-05-24ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.224.236~16.04.1) @ xenial2026-05-24ubuntu
ubuntulinux-tools-laptop-23.10 (6.5.0.1017.20) @ mantic2026-05-24ubuntu
ubuntulinux-tools-oracle-64k (6.5.0.1024.26) @ mantic2026-05-24ubuntu
ubuntulinux-tools-oem-22.04d (6.5.0.1024.26) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.5.0.41.41) @ mantic2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04 (6.5.0.41.41~22.04.2) @ jammy2026-05-24ubuntu
ubuntulinux-tools-starfive (6.5.0.1015.17) @ mantic2026-05-24ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.5.0.1021.29) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oracle-64k (6.5.0.1024.24~22.04.1) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oem-22.04c (6.1.0.1035.36) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.102.99) @ jammy2026-05-24ubuntu
redhatkernel-0:5.14.0-427.81.1.el9_42025-08-06redhat
redhatkernel-0:5.14.0-503.11.1.el9_52024-11-12redhat
redhatkernel-0:4.18.0-553.16.1.el8_102024-08-08redhat
linuxKernel @ 4.19.306—osv

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.

Additional Vendor Advisories

(16)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 47× 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.

  1. 2026-07-23 02:29 UTCEG score recompute
  2. 2026-07-22 23:15 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-22 14:07 UTCEPSS rescore
  5. 2026-07-21 15:23 UTCEPSS rescore
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  17. 2026-07-14 18:40 UTCOSV refresh
  18. 2026-07-13 22:28 UTCEPSS rescore
  19. 2026-07-13 22:28 UTCEPSS rescore
  20. 2026-07-13 06:11 UTCEPSS rescore
  21. 2026-07-12 05:45 UTCEPSS rescore
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  23. 2026-07-11 08:26 UTCEPSS rescore
  24. 2026-07-09 19:08 UTCEPSS rescore
  25. 2026-07-08 15:13 UTCEPSS rescore
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  1. 2026-07-07 13:45 UTCEPSS rescore
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  5. 2026-07-06 02:22 UTCEPSS rescore
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  7. 2026-07-05 02:29 UTCEPSS rescore
  8. 2026-07-01 15:05 UTCEPSS rescore
  9. 2026-06-30 23:21 UTCEPSS rescore
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  14. 2026-06-28 04:55 UTCEPSS rescore
  15. 2026-06-27 03:07 UTCEPSS rescore
  16. 2026-06-26 19:39 UTCOSV refresh
  17. 2026-06-25 13:48 UTCEPSS rescore
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  19. 2026-06-24 14:04 UTCEPSS rescore
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  23. 2026-06-22 14:24 UTCEPSS rescore
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  25. 2026-06-21 14:55 UTCEPSS rescore
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  27. 2026-06-21 01:58 UTCEPSS rescore
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  29. 2026-06-19 19:24 UTCEPSS rescore
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  39. 2026-06-12 23:11 UTCEPSS rescore
  40. 2026-06-11 13:59 UTCEPSS rescore
  41. 2026-06-10 22:17 UTCEPSS rescore
  42. 2026-06-10 13:21 UTCEPSS rescore
  43. 2026-06-09 05:00 UTCOSV refresh
  44. 2026-06-08 14:16 UTCEPSS rescore
  45. 2026-06-08 14:16 UTCEPSS rescore
  46. 2026-06-07 15:24 UTCEPSS rescore
  47. 2026-06-07 15:24 UTCEPSS rescore
  48. 2026-06-06 13:46 UTCEPSS rescore
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  50. 2026-06-05 22:46 UTCEPSS rescore
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  52. 2026-06-04 13:11 UTCEPSS rescore
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  54. 2026-06-02 20:12 UTCEPSS rescore
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  56. 2026-06-01 13:51 UTCEPSS rescore
  57. 2026-05-31 22:30 UTCEPSS rescore
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  59. 2026-05-31 00:15 UTCEPSS rescore
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  61. 2026-05-29 13:43 UTCEPSS rescore
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  68. 2026-05-26 07:18 UTCEPSS rescore
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  70. 2026-05-26 07:18 UTCEPSS rescore
  71. 2026-05-24 08:01 UTCEG score recompute
  72. 2026-05-24 08:01 UTCVendor advisory
  73. 2026-05-24 08:01 UTCGHSA enrichment

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-52451?
CVE-2023-52451 is a high vulnerability published on February 22, 2024. In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries/memhp: Fix access beyond end of drmem array dlparmemoryremovebyindex() may access beyond the bounds of the drmem lmb array when the LMB lookup fails to match an entry with the given DRC index. When the search fails,…
When was CVE-2023-52451 disclosed?
CVE-2023-52451 was first published in the National Vulnerability Database on February 22, 2024, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-52451 actively exploited?
CVE-2023-52451 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-52451?
CVE-2023-52451 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-52451?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-52451, 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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