{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31730", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.135Z", "datePublished": "2026-05-01T14:14:29.522Z", "dateUpdated": "2026-05-01T14:14:29.522Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-01T14:14:29.522Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: possible double-free of cctx->remote_heap\n\nfastrpc_init_create_static_process() may free cctx->remote_heap on the\nerr_map path but does not clear the pointer. Later, fastrpc_rpmsg_remove()\nfrees cctx->remote_heap again if it is non-NULL, which can lead to a\ndouble-free if the INIT_CREATE_STATIC ioctl hits the error path and the rpmsg\ndevice is subsequently removed/unbound.\nClear cctx->remote_heap after freeing it in the error path to prevent the\nlater cleanup from freeing it again.\n\nThis issue was found by an in-house analysis workflow that extracts AST-based\ninformation and runs static checks, with LLM assistance for triage, and was\nconfirmed by manual code review.\nNo hardware testing was performed."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/fastrpc.c"], "versions": [{"version": "0871561055e666da421d779397efcc1e5e964cab", "lessThan": "4b8e527aca357a6488680713bd88007cf8f547fe", "status": "affected", "versionType": "git"}, {"version": "0871561055e666da421d779397efcc1e5e964cab", "lessThan": "0bdee4118340c5a756220c1b29a7dab86bb0aa65", "status": "affected", "versionType": "git"}, {"version": "0871561055e666da421d779397efcc1e5e964cab", "lessThan": "3a164f640953cc982804746e772d379171aff5c6", "status": "affected", "versionType": "git"}, {"version": "0871561055e666da421d779397efcc1e5e964cab", "lessThan": "f67d368d26764a357691b2b3a33d3cb55b435bfc", "status": "affected", "versionType": "git"}, {"version": "0871561055e666da421d779397efcc1e5e964cab", "lessThan": "ba2c83167b215da30fa2aae56b140198cf8d8408", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/fastrpc.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4b8e527aca357a6488680713bd88007cf8f547fe"}, {"url": "https://git.kernel.org/stable/c/0bdee4118340c5a756220c1b29a7dab86bb0aa65"}, {"url": "https://git.kernel.org/stable/c/3a164f640953cc982804746e772d379171aff5c6"}, {"url": "https://git.kernel.org/stable/c/f67d368d26764a357691b2b3a33d3cb55b435bfc"}, {"url": "https://git.kernel.org/stable/c/ba2c83167b215da30fa2aae56b140198cf8d8408"}], "title": "misc: fastrpc: possible double-free of cctx->remote_heap", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: misc: fastrpc: possible double-free of cctx->remote_heap", "id": "2464470", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464470"}, "csaw": false, "cwe": "CWE-1341", "details": ["A flaw was found in the Linux kernel's fastrpc component that could lead to a denial of service (DoS) or potentially arbitrary code execution. This memory corruption vulnerability, specifically a double-free, occurs when the cctx->remote_heap memory is freed twice due to an error handling issue in the fastrpc_init_create_static_process() function. If the INIT_CREATE_STATIC ioctl hits an error path and the rpmsg device is subsequently removed, fastrpc_rpmsg_remove() attempts to free the same memory again."], "name": "CVE-2026-31730", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31730\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31730\nhttps://lore.kernel.org/linux-cve-announce/2026050136-CVE-2026-31730-ff8a@gregkh/T"]}