CVE-2024-56677

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2024-12-28. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()

During early init CMA_MIN_ALIGNMENT_BYTES can be PAGE_SIZE, since pageblock_order is still zero and it gets initialized later during initmem_init() e.g. setup_arch() -> initmem_init() -> sparse_init() -> set_pageblock_order()

One such use case where this causes issue is - early_setup() -> early_init_devtree() -> fadump_reserve_mem() -> fadump_cma_init()

This causes CMA memory alignment check to be bypassed in cma_init_reserved_mem(). Then later cma_activate_area() can hit a VM_BUG_ON_PAGE(pfn & ((1 << order) - 1)) if the reserved memory area was not pageblock_order aligned.

Fix it by moving the fadump_cma_init() after initmem_init(), where other such cma reservations also gets called.

============== page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10010 flags: 0x13ffff800000000(node=1|zone=0|lastcpupid=0x7ffff) CMA raw: 013ffff800000000 5deadbeef0000100 5deadbeef0000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: VM_BUG_ON_PAGE(pfn & ((1 << order) - 1)) ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:778!

Call Trace: __free_one_page+0x57c/0x7b0 (unreliable) free_pcppages_bulk+0x1a8/0x2c8 free_unref_page_commit+0x3d4/0x4e4 free_unref_page+0x458/0x6d0 init_cma_reserved_pageblock+0x114/0x198 cma_init_reserved_areas+0x270/0x3e0 do_one_initcall+0x80/0x2f8 kernel_init_freeable+0x33c/0x530 kernel_init+0x34/0x26c ret_from_kernel_user_thread+0x14/0x1c

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

December 28, 2024

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/05b94cae1c47f94588c3e7096963c1007c4d9c1d
generic

powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7351c5a6507b4401aeecadb5959131410a339520
generic

powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f551637fe9bf863386309e03f9d148d97f535ad1
generic

powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74
generic

powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aabef6301dcf410dfd2b8759cd413b2a003c7e3f

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-24.04b (6.11.0-1015.15) @ noble2026-08-05ubuntu
ubuntulinux-tools-raspi (6.8.0-1028.32) @ noble2026-08-05ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.11.0-1005.5) @ oracular2026-08-05ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-18.18) @ oracular2026-08-05ubuntu
ubuntulinux-virtual (6.8.0-58.60) @ noble2026-08-05ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1027.29~22.04.1) @ jammy2026-08-05ubuntu
ubuntulinux-tools-gkeop-6.8 (6.8.0-1010.12) @ noble2026-08-05ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1028.30~22.04.1) @ jammy2026-08-05ubuntu
ubuntulinux-tools-realtime-hwe-24.04 (6.8.1-1020.21) @ noble2026-08-05ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-58.60~22.04.1) @ jammy2026-08-05ubuntu
ubuntulinux-tools-azure-nvidia (6.8.0-1014.15) @ noble2026-08-05ubuntu
ubuntulinux-tools-raspi-realtime (6.8.0-2023.24) @ noble2026-08-05ubuntu
linuxKernel @ 6.1.120—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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux-6.16.1.106-3~deb11u1, 6.1.106-3~deb11u2, 6.1.106-3~deb11u3, 6.1.112-1~deb11u1, 6.1.119-1~deb11u16.1.128-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (32 versions)6.1.123-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.12.3-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.12.3-1—

Weakness Classification(1)

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

All Vendor Advisories

(12)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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 149 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2024-56677?
CVE-2024-56677 is a medium vulnerability published on December 28, 2024. In the Linux kernel, the following vulnerability has been resolved: powerpc/fadump: Move fadumpcmainit to setuparch() after initmeminit() During early init CMAMINALIGNMENTBYTES can be PAGESIZE, since pageblock_order is still zero and it gets initialized later during initmem_init() e.g. setuparch()…
When was CVE-2024-56677 disclosed?
CVE-2024-56677 was first published in the National Vulnerability Database on December 28, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-56677 actively exploited?
CVE-2024-56677 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.4% of all scored CVEs.
What is the CVSS score of CVE-2024-56677?
CVE-2024-56677 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2024-56677?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-56677, 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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