CVE-2026-89854

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

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

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

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown

qla84xx_put_chip() drops the last reference to ha->cs84xx and frees it via __qla84xx_chip_release() without clearing ha->cs84xx. During teardown it ran before scsi_remove_host(), which is what removes the 84xx_fw_version host sysfs attribute. A concurrent read of that attribute in the window between the two calls executes qla24xx_84xx_fw_version_show(), which dereferences the freed ha->cs84xx, resulting in a use-after-free.

Move qla84xx_put_chip() to after scsi_remove_host() in both qla2x00_remove_one() and qla2x00_disable_board_on_pci_error(). Once scsi_remove_host() returns, the sysfs attribute is gone and kernfs has drained any in-flight show(), so no reader can touch cs84xx; the put still runs before the host and ha are freed.

CVSS v3
7.8
EG Score
7.8HIGHhigh confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 16, 2026

Last Modified

September 16, 2026

Advisory Details (8)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2
generic

scsi: qla2xxx: Fix cs84xx use-after-free on host teardown - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed

Vendor Advisories for CVE-2026-89854(2)

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

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 38× in last 7d / 110× 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 110 total refreshes for this CVE.

  1. 2026-10-04 23:36 UTCEG score recompute
  2. 2026-10-04 23:36 UTCVendor advisory
  3. 2026-10-04 23:36 UTCGHSA enrichment
  4. 2026-10-04 23:22 UTCEPSS rescore
  5. 2026-10-04 11:06 UTCVendor advisory
  6. 2026-10-04 11:06 UTCGHSA enrichment
  7. 2026-10-03 22:38 UTCVendor advisory
  8. 2026-10-03 22:38 UTCGHSA enrichment
  9. 2026-10-03 10:09 UTCVendor advisory
  10. 2026-10-03 10:09 UTCGHSA enrichment
  11. 2026-10-02 21:40 UTCEG score recompute
  12. 2026-10-02 21:40 UTCVendor advisory
  13. 2026-10-02 21:40 UTCGHSA enrichment
  14. 2026-10-02 09:11 UTCVendor advisory
  15. 2026-10-02 09:11 UTCGHSA enrichment
  16. 2026-10-01 20:42 UTCEG score recompute
  17. 2026-10-01 20:42 UTCVendor advisory
  18. 2026-10-01 20:42 UTCGHSA enrichment
  19. 2026-10-01 19:51 UTCEPSS rescore
  20. 2026-10-01 08:11 UTCVendor advisory
  21. 2026-10-01 08:11 UTCGHSA enrichment
  22. 2026-09-30 19:43 UTCEG score recompute
  23. 2026-09-30 19:43 UTCVendor advisory
  24. 2026-09-30 19:43 UTCGHSA enrichment
  25. 2026-09-30 15:04 UTCEPSS rescore
Show 75 more
  1. 2026-09-30 07:14 UTCVendor advisory
  2. 2026-09-30 07:14 UTCGHSA enrichment
  3. 2026-09-29 18:45 UTCEG score recompute
  4. 2026-09-29 18:45 UTCVendor advisory
  5. 2026-09-29 18:44 UTCGHSA enrichment
  6. 2026-09-29 05:13 UTCEG score recompute
  7. 2026-09-29 05:13 UTCVendor advisory
  8. 2026-09-29 05:13 UTCGHSA enrichment
  9. 2026-09-28 16:44 UTCEG score recompute
  10. 2026-09-28 16:44 UTCVendor advisory
  11. 2026-09-28 16:44 UTCGHSA enrichment
  12. 2026-09-28 13:52 UTCEPSS rescore
  13. 2026-09-28 13:52 UTCEPSS rescore
  14. 2026-09-28 04:15 UTCVendor advisory
  15. 2026-09-28 04:15 UTCGHSA enrichment
  16. 2026-09-27 15:46 UTCEG score recompute
  17. 2026-09-27 15:46 UTCVendor advisory
  18. 2026-09-27 15:46 UTCGHSA enrichment
  19. 2026-09-27 13:49 UTCEPSS rescore
  20. 2026-09-27 03:15 UTCEG score recompute
  21. 2026-09-27 03:15 UTCVendor advisory
  22. 2026-09-27 03:15 UTCGHSA enrichment
  23. 2026-09-26 15:59 UTCEPSS rescore
  24. 2026-09-26 14:45 UTCVendor advisory
  25. 2026-09-26 14:45 UTCGHSA enrichment
  26. 2026-09-26 02:16 UTCEG score recompute
  27. 2026-09-26 02:16 UTCVendor advisory
  28. 2026-09-26 02:16 UTCGHSA enrichment
  29. 2026-09-25 13:43 UTCVendor advisory
  30. 2026-09-25 13:43 UTCGHSA enrichment
  31. 2026-09-25 01:14 UTCEG score recompute
  32. 2026-09-25 01:14 UTCVendor advisory
  33. 2026-09-25 01:14 UTCGHSA enrichment
  34. 2026-09-24 14:04 UTCEPSS rescore
  35. 2026-09-24 12:45 UTCVendor advisory
  36. 2026-09-24 12:45 UTCGHSA enrichment
  37. 2026-09-24 00:15 UTCEG score recompute
  38. 2026-09-24 00:15 UTCVendor advisory
  39. 2026-09-24 00:15 UTCGHSA enrichment
  40. 2026-09-23 17:54 UTCEPSS rescore
  41. 2026-09-23 11:46 UTCVendor advisory
  42. 2026-09-23 11:46 UTCGHSA enrichment
  43. 2026-09-22 23:16 UTCEG score recompute
  44. 2026-09-22 23:16 UTCVendor advisory
  45. 2026-09-22 23:16 UTCGHSA enrichment
  46. 2026-09-22 16:01 UTCEPSS rescore
  47. 2026-09-22 10:42 UTCVendor advisory
  48. 2026-09-22 10:42 UTCGHSA enrichment
  49. 2026-09-21 22:13 UTCEG score recompute
  50. 2026-09-21 22:13 UTCVendor advisory
  51. 2026-09-21 22:13 UTCGHSA enrichment
  52. 2026-09-21 21:09 UTCEPSS rescore
  53. 2026-09-21 09:44 UTCVendor advisory
  54. 2026-09-21 09:44 UTCGHSA enrichment
  55. 2026-09-20 21:15 UTCEG score recompute
  56. 2026-09-20 21:15 UTCVendor advisory
  57. 2026-09-20 21:15 UTCGHSA enrichment
  58. 2026-09-20 20:16 UTCEPSS rescore
  59. 2026-09-20 08:46 UTCVendor advisory
  60. 2026-09-20 08:46 UTCGHSA enrichment
  61. 2026-09-19 20:16 UTCEG score recompute
  62. 2026-09-19 20:16 UTCVendor advisory
  63. 2026-09-19 20:16 UTCGHSA enrichment
  64. 2026-09-19 07:47 UTCEG score recompute
  65. 2026-09-19 07:47 UTCVendor advisory
  66. 2026-09-19 07:47 UTCGHSA enrichment
  67. 2026-09-18 19:28 UTCEPSS rescore
  68. 2026-09-18 19:18 UTCVendor advisory
  69. 2026-09-18 19:18 UTCGHSA enrichment
  70. 2026-09-18 06:49 UTCEG score recompute
  71. 2026-09-18 06:49 UTCVendor advisory
  72. 2026-09-18 06:49 UTCGHSA enrichment
  73. 2026-09-17 19:32 UTCEPSS rescore
  74. 2026-09-17 18:20 UTCVendor advisory
  75. 2026-09-17 18:20 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-89854?
CVE-2026-89854 is a high vulnerability published on September 16, 2026. In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix cs84xx use-after-free on host teardown qla84xxputchip() drops the last reference to ha->cs84xx and frees it via qla84xxchiprelease() without clearing ha->cs84xx. During teardown it ran before scsiremovehost(),…
When was CVE-2026-89854 disclosed?
CVE-2026-89854 was first published on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89854 actively exploited?
CVE-2026-89854 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89854?
CVE-2026-89854 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-89854?
No fix for CVE-2026-89854 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-89854 are linked in the Vendor Advisories panel on this page.

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