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CVE-2026-53021— scsi: target: core: Fix integer overflow in UNMAP bounds check

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基金会开源的操作系统Linux所使用的内核。 Linux kernel 3.10版本存在安全漏洞，该漏洞源于sbc_execute_unmap()函数在检查UNMAP边界时未防止64位整数溢出，可能导致LBA+range环绕绕过设备容量检查。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 86d7182985d25900929adce14fffd729cc8c6fb8< c08ab702c4699c6efb9d60bdb15b73e7a627ee7e affected
86d7182985d25900929adce14fffd729cc8c6fb8< 2e1ed9a7b6ea5bfefb5d80a02b1c71c7dee1f0dd affected
86d7182985d25900929adce14fffd729cc8c6fb8< 5efc3ef4758f8d98c257419fa21daca3227de61a affected
86d7182985d25900929adce14fffd729cc8c6fb8< d7aef29573c7c5cdb2dfad939253287a6329c2a4 affected
86d7182985d25900929adce14fffd729cc8c6fb8< 3facdecc3fcf115cc4f9b3d8f118d6705e2456a8 affected
86d7182985d25900929adce14fffd729cc8c6fb8< 51075df70c46e60a9773f2dcd28299e40dac36fb affected
86d7182985d25900929adce14fffd729cc8c6fb8< 02115986d027ade793e7f6be87e91d6a796d0aa3 affected
86d7182985d25900929adce14fffd729cc8c6fb8< 2bf2d65f76697820dbc4227d13866293576dd90a affected
… +10 more rows
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I. Basic Information for CVE-2026-53021

Vulnerability Information
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Vulnerability Title
scsi: target: core: Fix integer overflow in UNMAP bounds check
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: target: core: Fix integer overflow in UNMAP bounds check sbc_execute_unmap() checks LBA + range does not exceed the device capacity, but does not guard against LBA + range wrapping around on 64-bit overflow. Add an overflow check matching the pattern already used for WRITE_SAME in the same file.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 3.10版本存在安全漏洞，该漏洞源于sbc_execute_unmap()函数在检查UNMAP边界时未防止64位整数溢出，可能导致LBA+range环绕绕过设备容量检查。
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 86d7182985d25900929adce14fffd729cc8c6fb8 ~ c08ab702c4699c6efb9d60bdb15b73e7a627ee7e -
Linux Linux 3.10 -

II. Public POCs for CVE-2026-53021

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III. Intelligence Information for CVE-2026-53021

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Patches & Fixes for CVE-2026-53021 (8)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
CVE-2026-52993 9.8 CRITICAL tipc: fix double-free in tipc_buf_append()
CVE-2026-52989 9.8 CRITICAL nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-52986 9.8 CRITICAL netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-52982 9.8 CRITICAL net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-53002 9.8 CRITICAL netfilter: conntrack: remove sprintf usage
CVE-2026-53086 9.8 CRITICAL net: bcmgenet: fix racing timeout handler
CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-53010 9.8 CRITICAL ksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-53088 9.8 CRITICAL net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-52924 9.8 CRITICAL sctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-52931 9.8 CRITICAL batman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-53055 9.8 CRITICAL crypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
CVE-2026-52958 9.1 CRITICAL libceph: Fix potential out-of-bounds access in osdmap_decode()
CVE-2026-53043 9.1 CRITICAL ocfs2/dlm: validate qr_numregions in dlm_match_regions()
CVE-2026-52999 9.1 CRITICAL netfilter: nfnetlink_osf: fix out-of-bounds read on option matching

Showing top 20 of 219 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53021

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