CVE-2026-43289

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-08. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

kexec: derive purgatory entry from symbol

kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN.

Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol.

WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e

[[email protected]: move helper to avoid forward declaration, per Baoquan]

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
2.4%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 15, 2026

Advisory Details (8)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f736032c638a33a243e9126e617788f763d648f9
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/875355152b33436907c2a6d2ffad1431fa86c62b
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5226570bd252cea2e805a161cb0f75c204c3108a
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/480e1d5c64bb14441f79f2eb9421d5e26f91ea3d
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/36eb314184a0ae74dd42914b47d2b9fc43be8034
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1737d37ae1d2814e6cf0a1af87af3d41f0812b95
generic

kexec: derive purgatory entry from symbol - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/027797595a108726f4a0a45d225f603b0ffbd22b

Vendor Advisories for CVE-2026-43289(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 38× 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 106 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43289?
CVE-2026-43289 is a medium vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexecloadpurgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the…
When was CVE-2026-43289 disclosed?
CVE-2026-43289 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43289 actively exploited?
CVE-2026-43289 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43289?
CVE-2026-43289 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43289?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43289, 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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