High 7.8Published May 1, 2026

CVE-2026-31730misc: fastrpc: possible double-free of cctx->remote_heap

Updated under an hour ago (Oct 27, 2026, 8:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	0871561055e666da421d779397efcc1e5e964cab builds before 4b8e527aca357a6488680713bd88007cf8f547fe; 0871561055e666da421d779397efcc1e5e964cab builds before 0bdee4118340c5a756220c1b29a7dab86bb0aa65; 0871561055e666da421d779397efcc1e5e964cab builds before 3a164f640953cc982804746e772d379171aff5c6; from 0871561055e666da421d779397efcc1e5e964cab before f67d368d26764a357691b2b3a33d3cb55b435bfc; from 0871561055e666da421d779397efcc1e5e964cab before ba2c83167b215da30fa2aae56b140198cf8d8408	CNA record
linux linux_kernel linux:linux_kernel	from 6.2 before 6.6.134; from 6.7 before 6.12.81; from 6.13 before 6.18.22; from 6.19 before 6.19.12; 7.0; 7.0; 7.0; 7.0; and 2 more ranges	NVD

References

References

https://git.kernel.org/stable/c/4b8e527aca357a6488680713bd88007cf8f547fe	patch
https://git.kernel.org/stable/c/0bdee4118340c5a756220c1b29a7dab86bb0aa65	patch
https://git.kernel.org/stable/c/3a164f640953cc982804746e772d379171aff5c6	patch
https://git.kernel.org/stable/c/f67d368d26764a357691b2b3a33d3cb55b435bfc	patch
https://git.kernel.org/stable/c/ba2c83167b215da30fa2aae56b140198cf8d8408	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.