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CVE-2026-74707— xsk: validate metadata when processing requests

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： xsk：在处理请求时验证元数据 零拷贝路径在获取描述符上下文时验证发送（TX）元数据，随后在准备硬件请求时再次读取该元数据。用户空间可在上述两个操作之间修改元数据，从而绕过最初的验证。 本修复通过在 中验证元数据，并将验证结果中的标志快照用于所有功能检查。同时，确保请求字段仅被读取一次，从而使所有零拷贝驱动程序仅处理经成功验证后观察到的值。

AI Predicted 7.8 Difficulty: Hard EPSS 0.22% · P13

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux ca4419f15abd19ba8be1e109661b60f9f5b6c9f0< 5fd121971912dee2f5af1efec64462ac722deb17 affected
ca4419f15abd19ba8be1e109661b60f9f5b6c9f0< 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba affected
ca4419f15abd19ba8be1e109661b60f9f5b6c9f0< 849b1664dbda1cf6c63e0fd4f9dec23782b8c851 affected
d9d736c416c9a85f84e15435ba82a177262e745b affected
6.14.2< 6.15 affected
6.15 affected
< 6.15 unaffected
6.18.45≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-74707

Vulnerability Information
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Vulnerability Title
xsk: validate metadata when processing requests
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xsk: validate metadata when processing requests The zero-copy path validates TX metadata while obtaining the descriptor context, then reads it again later when preparing the hardware request. User space can change the metadata between those operations and bypass the original validation. Validate the metadata in xsk_tx_metadata_request() and use the resulting flags snapshot for every feature check. Read request fields once so all zero-copy drivers process only values observed after successful validation.
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 ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 ~ 5fd121971912dee2f5af1efec64462ac722deb17 -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-74707

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III. Intelligence Information for CVE-2026-74707

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Patches & Fixes for CVE-2026-74707 (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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