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CVE-2026-72045— octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF

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基金会开源的一个操作系统内核。 Linux kernel 5.14版本存在安全漏洞，该漏洞源于rvu_mbox_handler_lmtst_tbl_setup()函数未对req->base_pcifunc参数进行充分验证，可能导致VF越权访问其他函数的LMTLINE物理基地址。

CVSS 8.8 · High EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 893ae97214c385be02f8ec097298cc48c7f0d905< 04c014e49b9f53d58a8f94adece8a0af3ae1b85c affected
893ae97214c385be02f8ec097298cc48c7f0d905< 6967dd944be2a71eddab3a2ae1a1a4dd9e5f8eed affected
893ae97214c385be02f8ec097298cc48c7f0d905< e9c5b03208507dd6d58b0c23a2c60b5c2f4c1b11 affected
893ae97214c385be02f8ec097298cc48c7f0d905< 54535692bec9ef464adc714108eb19e49e38b5a2 affected
893ae97214c385be02f8ec097298cc48c7f0d905< c73b8795b45f4ad5a95120d2e9b435ea4616e08e affected
893ae97214c385be02f8ec097298cc48c7f0d905< 59da37fee81a8d76079313348ca13c5bc90dd6ae affected
893ae97214c385be02f8ec097298cc48c7f0d905< 8cdcf3d2caacdee7ddd363705fb4d93b0c1a0915 affected
5.14 affected
… +8 more rows
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I. Basic Information for CVE-2026-72045

Vulnerability Information
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Vulnerability Title
octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF rvu_mbox_handler_lmtst_tbl_setup() uses req->base_pcifunc as a direct index into the LMT map table to read another function's LMTLINE physical base address and copy it into the caller's own LMT map table entry. The mailbox dispatcher authenticates req->hdr.pcifunc from the IRQ source, but req->base_pcifunc is a separate payload field and is not sanitized. Reject the request with -EPERM when a VF caller's base_pcifunc is not a valid function under its own PF. is_pf_func_valid() bounds the FUNC field to the PF's configured VF count, keeping the computed index inside the caller's own slot block.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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基金会开源的一个操作系统内核。 Linux kernel 5.14版本存在安全漏洞，该漏洞源于rvu_mbox_handler_lmtst_tbl_setup()函数未对req->base_pcifunc参数进行充分验证，可能导致VF越权访问其他函数的LMTLINE物理基地址。
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 893ae97214c385be02f8ec097298cc48c7f0d905 ~ 04c014e49b9f53d58a8f94adece8a0af3ae1b85c -
Linux Linux 5.14 -

II. Public POCs for CVE-2026-72045

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III. Intelligence Information for CVE-2026-72045

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Patches & Fixes for CVE-2026-72045 (7)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72206 9.8 CRITICAL ntfs: validate index block header more strictly
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72208 9.8 CRITICAL ntfs: add bounds check before accessing EA entries
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-74427 9.8 CRITICAL afs: Fix netns teardown to cancel the preallocation charger
CVE-2026-72137 9.8 CRITICAL xfrm: nat_keepalive: avoid double free on send error
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-72429 9.8 CRITICAL ipv6: ioam: fix type confusion of dst_entry
CVE-2026-72139 9.8 CRITICAL tcp: defer md5sig_info kfree past RCU grace period in tcp_connect
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-72046 9.8 CRITICAL gve: fix header buffer corruption with header-split and HW-GRO

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72045

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