CVE-2026-31730

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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

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:

misc: fastrpc: possible double-free of cctx->remote_heap

fastrpc_init_create_static_process() may free cctx->remote_heap on the err_map path but does not clear the pointer. Later, fastrpc_rpmsg_remove() frees cctx->remote_heap again if it is non-NULL, which can lead to a double-free if the INIT_CREATE_STATIC ioctl hits the error path and the rpmsg device is subsequently removed/unbound. Clear cctx->remote_heap after freeing it in the error path to prevent the later cleanup from freeing it again.

This issue was found by an in-house analysis workflow that extracts AST-based information and runs static checks, with LLM assistance for triage, and was confirmed by manual code review. No hardware testing was performed.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 1, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated May 7, 2026
No patch confirmed yet.
generic

misc: fastrpc: possible double-free of cctx->remote_heap - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f67d368d26764a357691b2b3a33d3cb55b435bfc
generic

misc: fastrpc: possible double-free of cctx->remote_heap - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ba2c83167b215da30fa2aae56b140198cf8d8408
generic

misc: fastrpc: possible double-free of cctx->remote_heap - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4b8e527aca357a6488680713bd88007cf8f547fe
generic

misc: fastrpc: possible double-free of cctx->remote_heap - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3a164f640953cc982804746e772d379171aff5c6
generic

misc: fastrpc: possible double-free of cctx->remote_heap - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0bdee4118340c5a756220c1b29a7dab86bb0aa65

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.6.134—osv

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (125 versions)6.19.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(13)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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 239 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-31730?
CVE-2026-31730 is a high vulnerability published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: possible double-free of cctx->remote_heap fastrpcinitcreatestaticprocess() may free cctx->remote_heap on the errmap path but does not clear the pointer. Later, fastrpcrpmsg_remove() frees cctx->remote_heap again if…
When was CVE-2026-31730 disclosed?
CVE-2026-31730 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31730 actively exploited?
CVE-2026-31730 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 97.1% of all scored CVEs.
What is the CVSS score of CVE-2026-31730?
CVE-2026-31730 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-31730?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31730, 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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