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

CVSS 7.8 · High EPSS 0.01% · P2
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I. Basic Information for CVE-2026-31730

Vulnerability Information
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Vulnerability Title
misc: fastrpc: possible double-free of cctx->remote_heap
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于fastrpc中cctx->remote_heap可能发生双重释放，可能导致内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 0871561055e666da421d779397efcc1e5e964cab ~ 4b8e527aca357a6488680713bd88007cf8f547fe -
LinuxLinux 6.2 -

II. Public POCs for CVE-2026-31730

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III. Intelligence Information for CVE-2026-31730

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Same Patch Batch · Linux · 2026-05-01 · 146 CVEs total

CVE-2026-430379.8 CRITICALip6_tunnel: clear skb2->cb[] in ip4ip6_err()
CVE-2026-430119.8 CRITICALnet/x25: Fix potential double free of skb
CVE-2026-317059.8 CRITICALksmbd: fix out-of-bounds write in smb2_get_ea() EA alignment
CVE-2026-430389.8 CRITICALipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()
CVE-2026-430399.8 CRITICALnet: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch
CVE-2026-317189.8 CRITICALksmbd: fix use-after-free in __ksmbd_close_fd() via durable scavenger
CVE-2026-317738.8 HIGHBluetooth: SMP: derive legacy responder STK authentication from MITM state
CVE-2026-430188.8 HIGHBluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt
CVE-2026-317068.8 HIGHksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl()
CVE-2026-317098.8 HIGHsmb: client: validate the whole DACL before rewriting it in cifsacl
CVE-2026-430488.8 HIGHHID: core: Mitigate potential OOB by removing bogus memset()
CVE-2026-317178.8 HIGHksmbd: validate owner of durable handle on reconnect
CVE-2026-317398.8 HIGHcrypto: tegra - Add missing CRYPTO_ALG_ASYNC
CVE-2026-317358.8 HIGHiommupt: Fix short gather if the unmap goes into a large mapping
CVE-2026-317128.3 HIGHksmbd: require minimum ACE size in smb_check_perm_dacl()
CVE-2026-317718.1 HIGHBluetooth: hci_event: move wake reason storage into validated event handlers
CVE-2026-317798.1 HIGHwifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()
CVE-2026-317088.1 HIGHsmb: client: fix OOB read in smb2_ioctl_query_info QUERY_INFO path
CVE-2026-430518.1 HIGHHID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq
CVE-2026-430567.8 HIGHnet: mana: fix use-after-free in add_adev() error path

Showing top 20 of 146 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31730

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