CVE-2026-12505

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-18. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the cifs-utils package where the cifs.upcall helper fails to securely drop its root privileges before looking up user information inside a user-controlled environment. A local, low privileged attacker can exploit this by using a crafted request_key payload to trick the root-owned helper into entering a custom environment (namespace) containing a malicious NSS module. This forces the system to load the attacker's controlled NSS Module and configuration, allowing them to execute arbitrary commands as the root user, elevating their privileges and fully compromising the system.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

June 18, 2026

Last Modified

September 1, 2026

Advisory Details (3)

Auto-updated Jun 18, 2026
Patch available. Sources: redhat.
generic

git.samba.org - cifs-utils.git/commit

https://git.samba.org/?p=cifs-utils.git;a=commit;h=972c5b5ff95e3e812bc8daa72d0383654ab0dba7
redhat

2489805 – (CVE-2026-12505) CVE-2026-12505 cifs-utils: local privilege escalation via forged cifs.spnego key description in cifs.upcall

https://bugzilla.redhat.com/show_bug.cgi?id=2489805
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-12505

Vendor Advisories for CVE-2026-12505(6)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntucifs-utils (2:7.0-2ubuntu0.5) @ noble2026-09-14ubuntu
ubuntucifs-utils (2:6.14-1ubuntu0.4) @ jammy2026-09-14ubuntu
redhatrhcos-4.22.9.8.202607220526-02026-07-28redhat
redhatcifs-utils-0:7.0-5.el8_102026-07-15redhat
redhatcifs-utils-0:7.6-2.el9_82026-07-15redhat
redhatcifs-utils-0:7.6-1.el10_22026-06-29redhat

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
cifs-utils2:6.11-3.1 ... 2:7.4-1 (13 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
cifs-utils2:7.0-2 ... 2:7.4-1 (7 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
cifs-utils2:7.4-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
cifs-utils2:7.4-1——

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 86× 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 350 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12505?
CVE-2026-12505 is a high vulnerability published on June 18, 2026. A flaw was found in the cifs-utils package where the cifs.upcall helper fails to securely drop its root privileges before looking up user information inside a user-controlled environment. A local, low privileged attacker can exploit this by using a crafted request_key payload to trick the…
When was CVE-2026-12505 disclosed?
CVE-2026-12505 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12505 actively exploited?
CVE-2026-12505 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 94.7% of all scored CVEs.
What is the CVSS score of CVE-2026-12505?
CVE-2026-12505 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-12505?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12505, 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.

Dependency Blast Radius

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