CVE-2025-38257— s390/pkey: Prevent overflow in size calculation for memdup_user()
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I. Basic Information for CVE-2025-38257
Vulnerability Information
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Vulnerability Title
s390/pkey: Prevent overflow in size calculation for memdup_user()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Prevent overflow in size calculation for memdup_user() Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow. In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later. Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations. Found by Linux Verification Center (linuxtesting.org).
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
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s390 pkey驱动中memdup_user计算溢出，可能导致内存分配错误。
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-2025-38257
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Same Patch Batch · Linux · 2025-07-09 · 26 CVEs total
| CVE-2025-38252 | cxl/ras: Fix CPER handler device confusion | |
| CVE-2025-38264 | nvme-tcp: sanitize request list handling | |
| CVE-2025-38263 | bcache: fix NULL pointer in cache_set_flush() | |
| CVE-2025-38261 | riscv: save the SR_SUM status over switches | |
| CVE-2025-38262 | tty: serial: uartlite: register uart driver in init | |
| CVE-2025-38260 | btrfs: handle csum tree error with rescue=ibadroots correctly | |
| CVE-2025-38259 | ASoC: codecs: wcd9335: Fix missing free of regulator supplies | |
| CVE-2025-38258 | mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write | |
| CVE-2025-38256 | io_uring/rsrc: fix folio unpinning | |
| CVE-2025-38255 | lib/group_cpus: fix NULL pointer dereference from group_cpus_evenly() | |
| CVE-2025-38254 | drm/amd/display: Add sanity checks for drm_edid_raw() | |
| CVE-2025-38253 | HID: wacom: fix crash in wacom_aes_battery_handler() | |
| CVE-2025-38251 | atm: clip: prevent NULL deref in clip_push() | |
| CVE-2025-38238 | scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out | |
| CVE-2025-38249 | ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3() | |
| CVE-2025-38250 | Bluetooth: hci_core: Fix use-after-free in vhci_flush() | |
| CVE-2025-38247 | userns and mnt_idmap leak in open_tree_attr(2) | |
| CVE-2025-38248 | bridge: mcast: Fix use-after-free during router port configuration | |
| CVE-2025-38246 | bnxt: properly flush XDP redirect lists | |
| CVE-2025-38244 | smb: client: fix potential deadlock when reconnecting channels |
Showing top 20 of 26 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-38257
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