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CVE-2025-21748— ksmbd: fix integer overflows on 32 bit systems

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ksmbd驱动在32位系统上可能存在整数溢出，导致内存损坏。

CVSS 9.8 · Critical EPSS 0.61% · P48

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf< f3b9fb2764591d792d160f375851013665a9e820 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 760568c1f62ea874e8fb492f9cfa4f47b4b8391e affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 82f59d64e6297f270311b16b5dcf65be406d1ea3 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< b4b902737746c490258de5cb55cab39e79927a67 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< ecb9947fa7c99a77b04d43404c6988a0d326e4a0 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< aab98e2dbd648510f8f51b83fbf4721206ccae45 affected
5.15 affected
< 5.15 unaffected
… +6 more rows
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I. Basic Information for CVE-2025-21748

Vulnerability Information
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Vulnerability Title
ksmbd: fix integer overflows on 32 bit systems
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix integer overflows on 32 bit systems On 32bit systems the addition operations in ipc_msg_alloc() can potentially overflow leading to memory corruption. Add bounds checking using KSMBD_IPC_MAX_PAYLOAD to avoid overflow.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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ksmbd驱动在32位系统上可能存在整数溢出，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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf ~ f3b9fb2764591d792d160f375851013665a9e820 -
Linux Linux 5.15 -

II. Public POCs for CVE-2025-21748

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III. Intelligence Information for CVE-2025-21748

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Patches & Fixes for CVE-2025-21748 (5)

Other References for CVE-2025-21748 (1)

Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-21805 9.8 CRITICAL RDMA/rtrs: Add missing deinit() call
CVE-2025-21707 9.8 CRITICAL mptcp: consolidate suboption status
CVE-2025-21796 9.8 CRITICAL nfsd: clear acl_access/acl_default after releasing them
CVE-2024-58006 9.6 CRITICAL PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
CVE-2024-57997 8.8 HIGH wifi: wcn36xx: fix channel survey memory allocation size
CVE-2024-57995 8.8 HIGH wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()
CVE-2024-57999 8.8 HIGH powerpc/pseries/iommu: IOMMU incorrectly marks MMIO range in DDW
CVE-2025-21735 8.8 HIGH NFC: nci: Add bounds checking in nci_hci_create_pipe()
CVE-2025-21710 8.2 HIGH tcp: correct handling of extreme memory squeeze
CVE-2025-21760 8.1 HIGH ndisc: extend RCU protection in ndisc_send_skb()
CVE-2024-57973 8.1 HIGH rdma/cxgb4: Prevent potential integer overflow on 32bit
CVE-2025-21766 8.1 HIGH ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21762 8.1 HIGH arp: use RCU protection in arp_xmit()
CVE-2025-21765 8.1 HIGH ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21730 7.8 HIGH wifi: rtw89: avoid to init mgnt_entry list twice when WoWLAN failed
CVE-2025-21718 7.8 HIGH net: rose: fix timer races against user threads
CVE-2025-21729 7.8 HIGH wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion
CVE-2025-21801 7.8 HIGH net: ravb: Fix missing rtnl lock in suspend/resume path
CVE-2025-21786 7.8 HIGH workqueue: Put the pwq after detaching the rescuer from the pool
CVE-2025-21722 7.8 HIGH nilfs2: do not force clear folio if buffer is referenced

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21748

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