CVE-2023-52506

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 5.5 from GitHub Security Advisory published 2024-03-03. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2023-57131 (ENISA EUVD) · GHSA-98gp-w8mx-vgw9 (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

LoongArch: Set all reserved memblocks on Node#0 at initialization

After commit 61167ad5fecdea ("mm: pass nid to reserve_bootmem_region()") we get a panic if DEFERRED_STRUCT_PAGE_INIT is enabled:

[ 0.000000] CPU 0 Unable to handle kernel paging request at virtual address 0000000000002b82, era == 90000000040e3f28, ra == 90000000040e3f18 [ 0.000000] Oops[#1]: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.5.0+ #733 [ 0.000000] pc 90000000040e3f28 ra 90000000040e3f18 tp 90000000046f4000 sp 90000000046f7c90 [ 0.000000] a0 0000000000000001 a1 0000000000200000 a2 0000000000000040 a3 90000000046f7ca0 [ 0.000000] a4 90000000046f7ca4 a5 0000000000000000 a6 90000000046f7c38 a7 0000000000000000 [ 0.000000] t0 0000000000000002 t1 9000000004b00ac8 t2 90000000040e3f18 t3 90000000040f0800 [ 0.000000] t4 00000000000f0000 t5 80000000ffffe07e t6 0000000000000003 t7 900000047fff5e20 [ 0.000000] t8 aaaaaaaaaaaaaaab u0 0000000000000018 s9 0000000000000000 s0 fffffefffe000000 [ 0.000000] s1 0000000000000000 s2 0000000000000080 s3 0000000000000040 s4 0000000000000000 [ 0.000000] s5 0000000000000000 s6 fffffefffe000000 s7 900000000470b740 s8 9000000004ad4000 [ 0.000000] ra: 90000000040e3f18 reserve_bootmem_region+0xec/0x21c [ 0.000000] ERA: 90000000040e3f28 reserve_bootmem_region+0xfc/0x21c [ 0.000000] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) [ 0.000000] PRMD: 00000000 (PPLV0 -PIE -PWE) [ 0.000000] EUEN: 00000000 (-FPE -SXE -ASXE -BTE) [ 0.000000] ECFG: 00070800 (LIE=11 VS=7) [ 0.000000] ESTAT: 00010800 [PIL] (IS=11 ECode=1 EsubCode=0) [ 0.000000] BADV: 0000000000002b82 [ 0.000000] PRID: 0014d000 (Loongson-64bit, Loongson-3A6000) [ 0.000000] Modules linked in: [ 0.000000] Process swapper (pid: 0, threadinfo=(____ptrval____), task=(____ptrval____)) [ 0.000000] Stack : 0000000000000000 9000000002eb5430 0000003a00000020 90000000045ccd00 [ 0.000000] 900000000470e000 90000000002c1918 0000000000000000 9000000004110780 [ 0.000000] 00000000fe6c0000 0000000480000000 9000000004b4e368 9000000004110748 [ 0.000000] 0000000000000000 900000000421ca84 9000000004620000 9000000004564970 [ 0.000000] 90000000046f7d78 9000000002cc9f70 90000000002c1918 900000000470e000 [ 0.000000] 9000000004564970 90000000040bc0e0 90000000046f7d78 0000000000000000 [ 0.000000] 0000000000004000 90000000045ccd00 0000000000000000 90000000002c1918 [ 0.000000] 90000000002c1900 900000000470b700 9000000004b4df78 9000000004620000 [ 0.000000] 90000000046200a8 90000000046200a8 0000000000000000 9000000004218b2c [ 0.000000] 9000000004270008 0000000000000001 0000000000000000 90000000045ccd00 [ 0.000000] ... [ 0.000000] Call Trace: [ 0.000000] [<90000000040e3f28>] reserve_bootmem_region+0xfc/0x21c [ 0.000000] [<900000000421ca84>] memblock_free_all+0x114/0x350 [ 0.000000] [<9000000004218b2c>] mm_core_init+0x138/0x3cc [ 0.000000] [<9000000004200e38>] start_kernel+0x488/0x7a4 [ 0.000000] [<90000000040df0d8>] kernel_entry+0xd8/0xdc [ 0.000000] [ 0.000000] Code: 02eb21ad 00410f4c 380c31ac <262b818d> 6800b70d 02c1c196 0015001c 57fe4bb1 260002cd

The reason is early memblock_reserve() in memblock_init() set node id to MAX_NUMNODES, making NODE_DATA(nid) a NULL dereference in the call chain reserve_bootmem_region() -> init_reserved_page(). After memblock_init(), those late calls of memblock_reserve() operate on subregions of memblock .memory regions. As a result, these reserved regions will be set to the correct node at the first iteration of memmap_init_reserved_pages().

So set all reserved memblocks on Node#0 at initialization can avoid this panic.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 2, 2024

Last Modified

August 15, 2026

Advisory Details (2)

Auto-updated Aug 15, 2026
Patch available.
Web page

LoongArch: Set all reserved memblocks on Node#0 at initialization - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b795fb9f5861ee256070d59e33130980a01fadd7
Web page

LoongArch: Set all reserved memblocks on Node#0 at initialization - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/19878758accf6b2788091a771d9f9fee7bab11ab

Vendor Advisories for CVE-2023-52506(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
linuxKernel @ 6.1.56 (fixes >=5.19.0)—osv
linuxKernel @ 6.5.6 (fixes >=6.5.0)—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.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.27-1 ... 6.1.55-1~bpo11+1 (11 versions)
  • every version up to 6.1.64-1: fixed in 6.1.64-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.5.6-1: fixed in 6.5.6-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.5.6-1: fixed in 6.5.6-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 36× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 93 of 203 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 7 repeat rows among the latest 100 are merged into the row they repeat. The 110 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  6. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-10-25 17:29 UTCEG score recompute
  10. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-24 11:44 UTCEG score recompute
  13. 2026-10-24 11:44 UTCGHSA enrichmentGHSA-98gp-w8mx-vgw9 · GitHub CVSS 5.5
  14. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-10-18 07:42 UTCEG score recompute
  20. 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-10-12 18:13 UTCEG score recompute
Show 68 more
  1. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-11 21:38 UTCEG score recompute
  3. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-10 02:25 UTCOSV refresh
  6. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  7. 2026-10-08 17:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-09-30 16:36 UTCEG score recompute
  15. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  22. 2026-09-20 10:51 UTCOSV refresh
  23. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  26. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  27. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  28. 2026-09-12 14:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  29. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  30. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  31. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  32. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  33. 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  34. 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  35. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  36. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  37. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  38. 2026-09-01 13:14 UTCOSV refresh
  39. 2026-09-01 04:36 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  40. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  41. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  42. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  43. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  44. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  45. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  46. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  48. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  50. 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  52. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  53. 2026-08-15 13:33 UTCGHSA enrichmentGHSA-98gp-w8mx-vgw9 · GitHub CVSS 5.5
  54. 2026-08-15 12:43 UTCEG score recompute
  55. 2026-08-15 12:43 UTCGHSA enrichmentGHSA-98gp-w8mx-vgw9 · GitHub CVSS 5.5
  56. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  57. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  58. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  59. 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  60. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  61. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  62. 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  63. 2026-08-07 16:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  64. 2026-08-06 13:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  65. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  66. 2026-08-04 10:36 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  67. 2026-08-03 10:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  68. 2026-08-02 02:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-52506?
CVE-2023-52506 is a medium-severity vulnerability; its CVE record was published on March 2, 2024. In the Linux kernel, the following vulnerability has been resolved: LoongArch: Set all reserved memblocks on Node#0 at initialization After commit 61167ad5fecdea ("mm: pass nid to reserve_bootmem_region()") we get a panic if DEFERRED_STRUCT_PAGE_INIT is enabled: [ 0.000000] CPU 0 Unable to handle…
When was the CVE record for CVE-2023-52506 published?
The CVE record for CVE-2023-52506 was published on March 2, 2024. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 15, 2026; the record at its source may have been updated since.
Is CVE-2023-52506 actively exploited?
CVE-2023-52506 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-52506?
CVE-2023-52506 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2023-52506?
A fix for CVE-2023-52506 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-52506 are linked in the Vendor Advisories panel on this page.

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