CVE-2026-80663

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-67539 (ENISA EUVD) · GHSA-3m25-qfr7-c9r2 (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

tools/power/x86/intel-speed-select: Harden daemon pidfile open

Avoid symlink-based pidfile clobbering by opening the pidfile with O_NOFOLLOW and validating it with fstat() before locking/writing.

The daemon currently uses a fixed pidfile path under /tmp. A local unprivileged user can pre-create a symlink at that path and cause a root-run daemon instance to write into an attacker-chosen file.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 28, 2026

Last Modified

October 16, 2026

Advisory Details (6)

Auto-updated Aug 29, 2026
Patch available.
Web page

tools/power/x86/intel-speed-select: Harden daemon pidfile open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc
Web page

tools/power/x86/intel-speed-select: Harden daemon pidfile open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28
Web page

tools/power/x86/intel-speed-select: Harden daemon pidfile open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278
Web page

tools/power/x86/intel-speed-select: Harden daemon pidfile open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce
Web page

tools/power/x86/intel-speed-select: Harden daemon pidfile open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b
Web page

tools/power/x86/intel-speed-select: Harden daemon pidfile open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d

Vendor Advisories for CVE-2026-80663(1)

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

Patch Availability(13)

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)
  • every version up to 6.1.180-1: fixed in 6.1.180-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)
  • every version up to 6.12.100-1: fixed in 6.12.100-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (161 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

All Vendor Advisories

(13)

Data Freshness Timeline

(refreshed 9× in last 7d / 39× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 227 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 127 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-11-11 04:59 UTCEchelonGraph re-scored
  4. 2026-11-11 04:59 UTCVendor advisory
  5. 2026-11-11 04:58 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  6. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-11-04 20:25 UTCEchelonGraph re-scored
  12. 2026-11-04 20:25 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  13. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-10-29 13:04 UTCEchelonGraph re-scored
  21. 2026-10-29 13:04 UTCVendor advisory
  22. 2026-10-29 13:03 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  23. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
Show 75 more
  1. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-25 13:59 UTCEchelonGraph re-scored
  3. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-23 03:53 UTCEchelonGraph re-scored
  6. 2026-10-23 03:53 UTCVendor advisory
  7. 2026-10-23 03:53 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  8. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-18 03:10 UTCEchelonGraph re-scored
  13. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-16 20:31 UTCEchelonGraph re-scored
  15. 2026-10-16 20:31 UTCVendor advisory
  16. 2026-10-16 20:31 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  17. 2026-10-16 19:37 UTCEchelonGraph re-scored
  18. 2026-10-16 19:37 UTCVendor advisory
  19. 2026-10-16 19:36 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  20. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-10-13 06:27 UTCEchelonGraph re-scored
  25. 2026-10-13 06:27 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  26. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  27. 2026-10-12 14:57 UTCEchelonGraph re-scored
  28. 2026-10-11 19:21 UTCEchelonGraph re-scored
  29. 2026-10-11 16:37 UTCEchelonGraph re-scored
  30. 2026-10-11 13:55 UTCEchelonGraph re-scored
  31. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  32. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  33. 2026-10-10 13:08 UTCVendor advisory
  34. 2026-10-10 13:07 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  35. 2026-10-10 01:12 UTCEchelonGraph re-scored
  36. 2026-10-10 01:11 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  37. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  38. 2026-10-09 02:46 UTCEchelonGraph re-scored
  39. 2026-10-09 02:46 UTCVendor advisory
  40. 2026-10-09 02:46 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  41. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  42. 2026-10-08 00:58 UTCEchelonGraph re-scored
  43. 2026-10-08 00:58 UTCVendor advisory
  44. 2026-10-08 00:58 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  45. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  46. 2026-10-07 02:53 UTCEchelonGraph re-scored
  47. 2026-10-07 02:53 UTCVendor advisory
  48. 2026-10-07 02:53 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  49. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  50. 2026-10-06 14:58 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  51. 2026-10-06 02:27 UTCEchelonGraph re-scored
  52. 2026-10-06 02:27 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  53. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  54. 2026-10-05 14:31 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  55. 2026-10-05 02:31 UTCEchelonGraph re-scored
  56. 2026-10-05 02:31 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  57. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  58. 2026-10-04 14:37 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  59. 2026-10-04 02:14 UTCEchelonGraph re-scored
  60. 2026-10-04 02:14 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  61. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  62. 2026-10-03 14:20 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  63. 2026-10-02 19:49 UTCEchelonGraph re-scored
  64. 2026-10-02 19:49 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  65. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  66. 2026-10-02 07:54 UTCEchelonGraph re-scored
  67. 2026-10-02 07:54 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  68. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  69. 2026-10-01 19:50 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  70. 2026-10-01 07:45 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  71. 2026-09-30 19:51 UTCEchelonGraph re-scored
  72. 2026-09-30 19:51 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  73. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  74. 2026-09-30 03:55 UTCGHSA enrichmentGHSA-3m25-qfr7-c9r2 · GitHub severity HIGH · GitHub CVSS 7.1
  75. 2026-09-29 09:54 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-80663?
CVE-2026-80663 is a high-severity vulnerability; its CVE record was published on August 28, 2026. In the Linux kernel, the following vulnerability has been resolved: tools/power/x86/intel-speed-select: Harden daemon pidfile open Avoid symlink-based pidfile clobbering by opening the pidfile with O_NOFOLLOW and validating it with fstat() before locking/writing. The daemon currently uses a fixed…
When was the CVE record for CVE-2026-80663 published?
The CVE record for CVE-2026-80663 was published on August 28, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 16, 2026; the record at its source may have been updated since.
Is CVE-2026-80663 actively exploited?
CVE-2026-80663 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-80663?
CVE-2026-80663 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-80663?
A fix for CVE-2026-80663 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-80663 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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