CVE-2026-31730 (GCVE-0-2026-31730)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-08-05 12:24
VLAI
Title
misc: fastrpc: possible double-free of cctx->remote_heap
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0871561055e666da421d779397efcc1e5e964cab , < 4b8e527aca357a6488680713bd88007cf8f547fe (git)
Affected: 0871561055e666da421d779397efcc1e5e964cab , < 0bdee4118340c5a756220c1b29a7dab86bb0aa65 (git)
Affected: 0871561055e666da421d779397efcc1e5e964cab , < 3a164f640953cc982804746e772d379171aff5c6 (git)
Affected: 0871561055e666da421d779397efcc1e5e964cab , < f67d368d26764a357691b2b3a33d3cb55b435bfc (git)
Affected: 0871561055e666da421d779397efcc1e5e964cab , < ba2c83167b215da30fa2aae56b140198cf8d8408 (git)
Create a notification for this product.
Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
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      "cve": "CVE-2026-31730",
      "id": "CVE-2026-31730",
      "initial_release_date": "2026-05-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: misc: fastrpc: possible double-free of cctx-\u003eremote_heap",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31730.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-22T00:05:56Z",
      "cve": "CVE-2026-31730",
      "id": "CVE-2026-31730",
      "initial_release_date": "2026-05-06T01:43:22Z",
      "product_status:known_affected": "46",
      "product_status:known_not_affected": "190",
      "product_status:recommended": "98",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31730",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31730.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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