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CVE-2025-40036— misc: fastrpc: fix possible map leak in fastrpc_put_args

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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copy_to_user失败时未清理fdlist，可能导致映射泄露。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.22% · P11

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux c68cfb718c8f97b7f7a50ed66be5feb42d0c8988< a085658264d0c8d4f795d4631f77d7289a021de9 affected
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988< 3ad42dc66445df6977cf4be0c06f1a655299ce6c affected
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988< 78d33a041555db03903e8037fd053ed74fbd88cb affected
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988< c000f65f0ac93d9f9cc69a230d372f6ca93e4879 affected
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988< da1ba64176e0138f2bfa96f9e43e8c3640d01e1e affected
5.1 affected
< 5.1 unaffected
6.1.156≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-40036

Vulnerability Information
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Vulnerability Title
misc: fastrpc: fix possible map leak in fastrpc_put_args
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: fix possible map leak in fastrpc_put_args copy_to_user() failure would cause an early return without cleaning up the fdlist, which has been updated by the DSP. This could lead to map leak. Fix this by redirecting to a cleanup path on failure, ensuring that all mapped buffers are properly released before returning.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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copy_to_user失败时未清理fdlist，可能导致映射泄露。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 ~ a085658264d0c8d4f795d4631f77d7289a021de9 -
Linux Linux 5.1 -

II. Public POCs for CVE-2025-40036

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III. Intelligence Information for CVE-2025-40036

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Patches & Fixes for CVE-2025-40036 (1)

Same Patch Batch · Linux · 2025-10-28 · 58 CVEs total

CVE-2025-40074 9.8 CRITICAL ipv4: start using dst_dev_rcu()
CVE-2025-40043 8.8 HIGH net: nfc: nci: Add parameter validation for packet data
CVE-2025-40039 8.8 HIGH ksmbd: Fix race condition in RPC handle list access
CVE-2025-40058 8.8 HIGH iommu/vt-d: Disallow dirty tracking if incoherent page walk
CVE-2025-40046 8.6 HIGH io_uring/zcrx: fix overshooting recv limit
CVE-2025-40068 8.4 HIGH fs: ntfs3: Fix integer overflow in run_unpack()
CVE-2025-40075 8.1 HIGH tcp_metrics: use dst_dev_net_rcu()
CVE-2025-40026 7.9 HIGH KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O
CVE-2025-40027 7.8 HIGH net/9p: fix double req put in p9_fd_cancelled
CVE-2025-40054 7.8 HIGH f2fs: fix UAF issue in f2fs_merge_page_bio()
CVE-2025-40045 7.8 HIGH ASoC: codecs: wcd937x: set the comp soundwire port correctly
CVE-2025-40047 7.8 HIGH io_uring/waitid: always prune wait queue entry in io_waitid_wait()
CVE-2025-40051 7.8 HIGH vhost: vringh: Modify the return value check
CVE-2025-40025 7.8 HIGH f2fs: fix to do sanity check on node footer for non inode dnode
CVE-2025-40061 7.8 HIGH RDMA/rxe: Fix race in do_task() when draining
CVE-2025-40064 7.8 HIGH smc: Fix use-after-free in __pnet_find_base_ndev().
CVE-2025-40067 7.8 HIGH fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist
CVE-2025-40069 7.8 HIGH drm/msm: Fix obj leak in VM_BIND error path
CVE-2025-40079 7.8 HIGH riscv, bpf: Sign extend struct ops return values properly
CVE-2025-40081 7.8 HIGH perf: arm_spe: Prevent overflow in PERF_IDX2OFF()

Showing top 20 of 58 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40036

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