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CVE-2026-74703— vhost-scsi: Validate T10 PI scatterlist counts

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.

在 Linux 内核中，已修复以下漏洞： vhost-scsi：验证 T10 PI（数据保护信息）的 scatterlist 计数 当协商启用 T10 PI（即数据保护功能）时，vhost-scsi 会在映射请求的 scatterlist（分散列表）之前，从数据迭代器中分离出保护字节。然而，构造不良（malformed）的请求可能声称其保护字节覆盖或超过了整个有效载荷（payload）的长度。前一种情况会导致没有剩余的数据字节可供映射；后一种情况则在迭代器前进之前导致 （期望数据长度）下溢。这两种情况都可能导致向

AI Predicted 7.8 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux bca939d5bcd00d6faea99c47eafd60bed573ef03< 2417a498cf3fe64d06faf87e236eda98dd4f04e0 affected
bca939d5bcd00d6faea99c47eafd60bed573ef03< f8fe3f8d342da750dd10361bf66009fd3072926b affected
bca939d5bcd00d6faea99c47eafd60bed573ef03< d876c493fc4b811941bfeb4c80beb2dfc4bf025e affected
6.15 affected
< 6.15 unaffected
6.18.45≤ 6.18.* unaffected
7.1.9≤ 7.1.* unaffected
7.2≤ * unaffected
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I. Basic Information for CVE-2026-74703

Vulnerability Information
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Vulnerability Title
vhost-scsi: Validate T10 PI scatterlist counts
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vhost-scsi: Validate T10 PI scatterlist counts When T10 PI is negotiated, vhost-scsi splits protection bytes from the data iterator before mapping the request scatterlists. A malformed request can claim protection bytes that cover or exceed the full payload length. The former leaves no data bytes to map, while the latter underflows exp_data_len before advancing the iterator. Both cases can let a zero data SGL count reach sg_alloc_table_chained(), which triggers BUG_ON(!nents). Reject protection lengths that cover or exceed the payload before subtracting prot_bytes and advancing the iterator. Also propagate negative errors from the protection SGL calculation before calling the allocator, matching the data SGL path.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux bca939d5bcd00d6faea99c47eafd60bed573ef03 ~ 2417a498cf3fe64d06faf87e236eda98dd4f04e0 -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-74703

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III. Intelligence Information for CVE-2026-74703

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Patches & Fixes for CVE-2026-74703 (3)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74638 drm/v3d: Serialize the scheduler timeout handlers
CVE-2026-74621 net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
CVE-2026-74622 net: atlantic: free RX pages of consumed but not refilled buffers
CVE-2026-74623 net: atlantic: free stranded TX buffers on ring deinit
CVE-2026-74624 netfilter: nf_conntrack: defer invalid log until after unlock
CVE-2026-74625 netfilter: bridge: release template ct on non-IP path
CVE-2026-74627 net: devmem: prevent net-iov / page mixing
CVE-2026-74626 NTB: ntb_netdev: Preserve RX queue depth on allocation failure
CVE-2026-74628 net/x25: fix use-after-free of the socket by its timers
CVE-2026-74629 net/dibs: Correct freeing of dmb_clientid_arr
CVE-2026-74631 net: smc: fix splice entry lifetime imbalance in smc_rx_splice
CVE-2026-74630 ipv6: prevent in6_dev_get() from resurrecting inet6_dev
CVE-2026-74632 mm/huge_memory: fix huge_zero_pfn race
CVE-2026-74633 tracing: Fix NULL pointer dereference in module event cache removal
CVE-2026-74634 ring-buffer: Prevent subbuf order change when resizing is disabled
CVE-2026-74635 fbdev: bitblit: bound-check glyph index in bit_cursor()
CVE-2026-74636 tracing: Fix race between update_event_fields and, event_define_fields
CVE-2026-74637 perf/core: Fix group leader use-after-free after sibling detach
CVE-2026-74639 ALSA: us144mkii: re-anchor capture URBs on resubmission
CVE-2026-74650 staging: rtl8723bs: fix OOB read in WMM_param_handler()

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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