CVE-2024-47809

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-01-11. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
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:

dlm: fix possible lkb_resource null dereference

This patch fixes a possible null pointer dereference when this function is called from request_lock() as lkb->lkb_resource is not assigned yet, only after validate_lock_args() by calling attach_lkb(). Another issue is that a resource name could be a non printable bytearray and we cannot assume to be ASCII coded.

The log functionality is probably never being hit when DLM is used in normal way and no debug logging is enabled. The null pointer dereference can only occur on a new created lkb that does not have the resource assigned yet, it probably never hits the null pointer dereference but we should be sure that other changes might not change this behaviour and we actually can hit the mentioned null pointer dereference.

In this patch we just drop the printout of the resource name, the lkb id is enough to make a possible connection to a resource name if this exists.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

January 11, 2025

Last Modified

July 14, 2026

Advisory Details (7)

Auto-updated Jul 19, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

SSA-082556

https://cert-portal.siemens.com/productcert/html/ssa-082556.html
generic

SSA-019113

https://cert-portal.siemens.com/productcert/html/ssa-019113.html
generic

dlm: fix possible lkb_resource null dereference - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e1ffea6bec96d4349dbfcc42ad3e436259f64243
generic

dlm: fix possible lkb_resource null dereference - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b98333c67daf887c724cd692e88e2db9418c0861
generic

dlm: fix possible lkb_resource null dereference - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8d55ce46dd543c6965970ce70c22c3076dd35b1e
generic

dlm: fix possible lkb_resource null dereference - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6fbdc3980b70e9c1c86eccea7d5ee68108008fa7
generic

dlm: fix possible lkb_resource null dereference - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2db11504ef82a60c1a2063ba7431a5cd013ecfcb

Vendor Advisories for CVE-2024-47809(1)

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

Patch Availability(15)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-21.21) @ oracular2026-05-30ubuntu
ubuntulinux-tools-lowlatency-64k (6.11.0-1011.12) @ oracular2026-05-30ubuntu
ubuntulinux-tools-lowlatency-hwe-24.04-edge (6.11.0-1011.12~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-oem-24.04b (6.11.0-1017.17) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi (6.11.0-1010.10) @ oracular2026-05-30ubuntu
ubuntulinux-virtual (6.8.0-58.60) @ noble2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1028.30~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-24.04 (6.8.1-1020.21) @ noble2026-05-30ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1027.29~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gkeop-6.8 (6.8.0-1010.12) @ noble2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-58.60~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-nvidia (6.8.0-1014.15) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi-realtime (6.8.0-2023.24) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi (6.8.0-1028.32) @ noble2026-05-30ubuntu
linuxKernel @ 5.15.209—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.

All Vendor Advisories

(15)

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

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

Frequently asked(5)

What is CVE-2024-47809?
CVE-2024-47809 is a medium vulnerability published on January 11, 2025. In the Linux kernel, the following vulnerability has been resolved: dlm: fix possible lkb_resource null dereference This patch fixes a possible null pointer dereference when this function is called from requestlock() as lkb->lkbresource is not assigned yet, only after validatelockargs() by calling…
When was CVE-2024-47809 disclosed?
CVE-2024-47809 was first published in the National Vulnerability Database on January 11, 2025, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-47809 actively exploited?
CVE-2024-47809 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 87.4% of all scored CVEs.
What is the CVSS score of CVE-2024-47809?
CVE-2024-47809 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2024-47809?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-47809, 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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