CVE-2025-40031— tee: fix register_shm_helper()
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iov_iter_extract_pages调用错误处理不当，可能导致空指针取消引用。
Possible ATT&CK Techniques 2 AI
T1068 · Exploitation for Privilege Escalation T1203 · Exploitation for Client ExecutionAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7bdee41575919773818e525ea19e54eb817770af< 9338093db954918558677a468d32e77041c65167 |
affected |
7bdee41575919773818e525ea19e54eb817770af< 6a7874ab814ce12003c46a92f7afc9b035c8e8e9 |
affected | ||
7bdee41575919773818e525ea19e54eb817770af< d5cf5b37064b1699d946e8b7ab4ac7d7d101814c |
affected | ||
6.8 |
affected | ||
< 6.8 |
unaffected | ||
6.12.53≤ 6.12.* |
unaffected | ||
6.17.3≤ 6.17.* |
unaffected | ||
6.18≤ * |
unaffected |
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I. Basic Information for CVE-2025-40031
Vulnerability Information
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Vulnerability Title
tee: fix register_shm_helper()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
tee: fix register_shm_helper()
In register_shm_helper(), fix incorrect error handling for a call to
iov_iter_extract_pages(). A case is missing for when
iov_iter_extract_pages() only got some pages and return a number larger
than 0, but not the requested amount.
This fixes a possible NULL pointer dereference following a bad input from
ioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn't mapped.
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iov_iter_extract_pages调用错误处理不当，可能导致空指针取消引用。
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
II. Public POCs for CVE-2025-40031
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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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 → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2023-7356
Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SE -
CVE-2026-98869
bpf: Infer zext_dst based on static register liveness analys -
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U
Same vendor: Linux
-
CVE-2023-7356
Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SE -
CVE-2026-98869
bpf: Infer zext_dst based on static register liveness analys -
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U
V. Comments for CVE-2025-40031
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