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CVE-2026-74712— vdpa/mlx5: Fix buffer length in create_direct_keys()

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： vdpa/mlx5: 修复 create_direct_keys() 中的缓冲区长度错误 我们在 CI 环境中观察到以下 KASAN（内核地址sanitizer）消息： 该错误地址位于已分配的 4384 字节区域 内部，偏移量为 4128 字节。 本质上，我们读取了超出 4384 字节分配区域 16 字节的内容。 函数用于计算输入（in）和输出（out）缓冲区的指针和长度。然而，其输入大小的计算包含了整个结构体的大小（即 out + in + mtt[] 的总大小），但传递

AI Predicted 7.8 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1200.003

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 0071b138d44af4296bf871e6624369ce697b4b15< ec3bb289cf19d526224117d5d450a5fd9cbd5ab2 affected
0071b138d44af4296bf871e6624369ce697b4b15< cde8931a25392670dd59a0acfcab87a830ab66c5 affected
0071b138d44af4296bf871e6624369ce697b4b15< 6c8a9f7bc00301e533a5366384f3070a8e7f8430 affected
0071b138d44af4296bf871e6624369ce697b4b15< 727e1f569855df83579edbd73dcb4a0723543a12 affected
6.12 affected
< 6.12 unaffected
6.12.104≤ 6.12.* unaffected
6.18.45≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-74712

Vulnerability Information
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Vulnerability Title
vdpa/mlx5: Fix buffer length in create_direct_keys()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vdpa/mlx5: Fix buffer length in create_direct_keys() We have seen in our CI the following KASAN message: BUG: KASAN: slab-out-of-bounds in cmd_exec+0x550/0xca0 [mlx5_core] Read of size 272 at addr 0000000176795020 by task qemu-system-s39/82764 [...] [<000011388ab3a7a0>] cmd_exec+0x550/0xca0 [mlx5_core] [<000011388ab3b61c>] mlx5_cmd_exec_cb+0x25c/0x4f0 [mlx5_core] [<000011388b21e82e>] mlx5_vdpa_exec_async_cmds+0x22e/0x5e0 [mlx5_vdpa] [<000011388b21fd44>] create_direct_keys+0x954/0xef0 [mlx5_vdpa] [...] The buggy address is located 4128 bytes inside of allocated 4384-byte region [0000000176794000, 0000000176795120) So in essence we read 16 bytes beyond 4384-byte allocation. create_direct_keys calculates the pointer and length for in and out buffers. The size calculation for in includes the entire structure size (out + in + mtt[]) but the pointer passed to cmd_exec points only to the 'in' field, skipping the 'out' field. This causes mlx5_copy_to_msg() to read beyond the allocated buffer by sizeof(out) bytes when copying command data. Properly calculate the input size to match the pointer and allocation size.
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 0071b138d44af4296bf871e6624369ce697b4b15 ~ ec3bb289cf19d526224117d5d450a5fd9cbd5ab2 -
Linux Linux 6.12 -

II. Public POCs for CVE-2026-74712

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III. Intelligence Information for CVE-2026-74712

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Patches & Fixes for CVE-2026-74712 (4)

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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