CVE-2026-89988

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:

kprobes: Protect kprobe_blacklist with RCU

__within_kprobe_blacklist() traverses kprobe_blacklist without holding kprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist() removes blacklist entries and immediately frees them with kfree(). A concurrent call to within_kprobe_blacklist() can therefore dereference freed memory.

Furthermore, within_kprobe_blacklist() can be called in atomic or non-preemptible contexts where the sleeping kprobe_mutex cannot be taken.

Protect kprobe_blacklist with RCU. Use guard(rcu)() and list_for_each_entry_rcu() for traversal, list_add_tail_rcu() for insertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim entries safely after a grace period.

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
6th
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 (6)

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

kprobes: Protect kprobe_blacklist with RCU - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3
generic

kprobes: Protect kprobe_blacklist with RCU - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f
generic

kprobes: Protect kprobe_blacklist with RCU - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f
generic

kprobes: Protect kprobe_blacklist with RCU - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32
generic

kprobes: Protect kprobe_blacklist with RCU - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad
generic

kprobes: Protect kprobe_blacklist with RCU - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f

Vendor Advisories for CVE-2026-89988(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 39× in last 7d / 115× 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 115 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-89988?
CVE-2026-89988 is a high vulnerability published on September 16, 2026. In the Linux kernel, the following vulnerability has been resolved: kprobes: Protect kprobe_blacklist with RCU withinkprobeblacklist() traverses kprobe_blacklist without holding kprobemutex. When a module is unloaded, kproberemoveareablacklist() removes blacklist entries and immediately frees them…
When was CVE-2026-89988 disclosed?
CVE-2026-89988 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-2026-89988 actively exploited?
CVE-2026-89988 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89988?
CVE-2026-89988 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-2026-89988?
No fix for CVE-2026-89988 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-2026-89988 are linked in the Vendor Advisories panel on this page.

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