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CVE-2025-38445— md/raid1: Fix stack memory use after return in raid1_reshape

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reshape操作后栈内存使用问题，可能导致内核崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux afeee514ce7f4cab605beedd03be71ebaf0c5fc8< d8a6853d00fbaa810765c8ed2f452a5832273968 affected
afeee514ce7f4cab605beedd03be71ebaf0c5fc8< 12b00ec99624f8da8c325f2dd6e807df26df0025 affected
afeee514ce7f4cab605beedd03be71ebaf0c5fc8< 48da050b4f54ed639b66278d0ae6f4107b2c4e2d affected
afeee514ce7f4cab605beedd03be71ebaf0c5fc8< 5f35e48b76655e45522df338876dfef88dafcc71 affected
afeee514ce7f4cab605beedd03be71ebaf0c5fc8< df5894014a92ff0196dbc212a7764e97366fd2b7 affected
afeee514ce7f4cab605beedd03be71ebaf0c5fc8< 776e6186dc9ecbdb8a1b706e989166c8a99bbf64 affected
afeee514ce7f4cab605beedd03be71ebaf0c5fc8< 61fd5e93006cf82ec8ee5c115ab5cf4bbd104bdb affected
afeee514ce7f4cab605beedd03be71ebaf0c5fc8< d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98 affected
… +10 more rows
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I. Basic Information for CVE-2025-38445

Vulnerability Information
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Vulnerability Title
md/raid1: Fix stack memory use after return in raid1_reshape
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: md/raid1: Fix stack memory use after return in raid1_reshape In the raid1_reshape function, newpool is allocated on the stack and assigned to conf->r1bio_pool. This results in conf->r1bio_pool.wait.head pointing to a stack address. Accessing this address later can lead to a kernel panic. Example access path: raid1_reshape() { // newpool is on the stack mempool_t newpool, oldpool; // initialize newpool.wait.head to stack address mempool_init(&newpool, ...); conf->r1bio_pool = newpool; } raid1_read_request() or raid1_write_request() { alloc_r1bio() { mempool_alloc() { // if pool->alloc fails remove_element() { --pool->curr_nr; } } } } mempool_free() { if (pool->curr_nr < pool->min_nr) { // pool->wait.head is a stack address // wake_up() will try to access this invalid address // which leads to a kernel panic return; wake_up(&pool->wait); } } Fix: reinit conf->r1bio_pool.wait after assigning newpool.
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reshape操作后栈内存使用问题，可能导致内核崩溃。
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 afeee514ce7f4cab605beedd03be71ebaf0c5fc8 ~ d8a6853d00fbaa810765c8ed2f452a5832273968 -
Linux Linux 4.18 -

II. Public POCs for CVE-2025-38445

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III. Intelligence Information for CVE-2025-38445

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Patches & Fixes for CVE-2025-38445 (1)

Same Patch Batch · Linux · 2025-07-25 · 114 CVEs total

CVE-2025-38429 10.0 CRITICAL bus: mhi: ep: Update read pointer only after buffer is written
CVE-2025-38430 9.8 CRITICAL nfsd: nfsd4_spo_must_allow() must check this is a v4 compound request
CVE-2025-38411 9.8 CRITICAL netfs: Fix double put of request
CVE-2025-38439 9.8 CRITICAL bnxt_en: Set DMA unmap len correctly for XDP_REDIRECT
CVE-2025-38365 9.1 CRITICAL btrfs: fix a race between renames and directory logging
CVE-2025-38377 8.8 HIGH rose: fix dangling neighbour pointers in rose_rt_device_down()
CVE-2025-38367 8.8 HIGH LoongArch: KVM: Avoid overflow with array index
CVE-2025-38437 8.8 HIGH ksmbd: fix potential use-after-free in oplock/lease break ack
CVE-2025-38375 8.4 HIGH virtio-net: ensure the received length does not exceed allocated size
CVE-2025-38395 8.4 HIGH regulator: gpio: Fix the out-of-bounds access to drvdata::gpiods
CVE-2025-38449 7.8 HIGH drm/gem: Acquire references on GEM handles for framebuffers
CVE-2025-38453 7.8 HIGH io_uring/msg_ring: ensure io_kiocb freeing is deferred for RCU
CVE-2025-38396 7.8 HIGH fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass
CVE-2025-38412 7.8 HIGH platform/x86: dell-wmi-sysman: Fix WMI data block retrieval in sysfs callbacks
CVE-2025-38408 7.8 HIGH genirq/irq_sim: Initialize work context pointers properly
CVE-2025-38386 7.8 HIGH ACPICA: Refuse to evaluate a method if arguments are missing
CVE-2025-38447 7.8 HIGH mm/rmap: fix potential out-of-bounds page table access during batched unmap
CVE-2025-38440 7.8 HIGH net/mlx5e: Fix race between DIM disable and net_dim()
CVE-2025-38382 7.8 HIGH btrfs: fix iteration of extrefs during log replay
CVE-2025-38416 7.8 HIGH NFC: nci: uart: Set tty->disc_data only in success path

Showing top 20 of 114 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38445

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