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CVE-2026-72236— s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init()

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 3.4版本存在安全漏洞，该漏洞源于ev变量由用户空间通过event->attr.config控制，在边界检查后用作数组索引但缺少推测屏障，可能导致推测执行。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.21% · P12

Possible ATT&CK Techniques 1 AI

T1564.008 · Email Hiding Rules

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 212188a596d17d519842ef2173150315735b54e1< 4c249b214c686f9a1c4cf4f32893b59b189e897a affected
212188a596d17d519842ef2173150315735b54e1< 27206bb57c47bdbe33bccc78fa7f7e2a719a06b9 affected
212188a596d17d519842ef2173150315735b54e1< a21f3615c88421df81060b6ff89220fd34094c4d affected
212188a596d17d519842ef2173150315735b54e1< fa1ebae4206e6afc8caa642e9eb1bbe39a9a724f affected
212188a596d17d519842ef2173150315735b54e1< f79dff8c721bbb1f3fc312ea55e0551c2cc28801 affected
212188a596d17d519842ef2173150315735b54e1< 49145bce539117db4b6e9e83c0e5ef528e361050 affected
3.4 affected
< 3.4 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-72236

Vulnerability Information
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Vulnerability Title
s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init() ev variable is userspace controlled via event->attr.config and used as an array index after bounds checking, but without speculation barriers. Add the missing array_index_nospec() call to prevent speculative execution.
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基金会开源的一个操作系统内核。 Linux kernel 3.4版本存在安全漏洞，该漏洞源于ev变量由用户空间通过event->attr.config控制，在边界检查后用作数组索引但缺少推测屏障，可能导致推测执行。
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 212188a596d17d519842ef2173150315735b54e1 ~ 4c249b214c686f9a1c4cf4f32893b59b189e897a -
Linux Linux 3.4 -

II. Public POCs for CVE-2026-72236

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III. Intelligence Information for CVE-2026-72236

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Patches & Fixes for CVE-2026-72236 (6)

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-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72201 9.8 CRITICAL ntfs: validate index entries on reading
CVE-2026-74268 9.8 CRITICAL tcp: clear sock_ops cb flags before force-closing a child socket
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-2026-74478 9.8 CRITICAL um: vector: fix use-after-free in vector_mmsg_rx()
CVE-2026-72191 9.8 CRITICAL ntfs3: validate split-point offset in indx_insert_into_buffer
CVE-2026-72192 9.8 CRITICAL ntfs3: bound to_move in indx_insert_into_root before hdr_insert_head
CVE-2026-74269 9.8 CRITICAL bnxt: fix head underflow on XDP head-grow
CVE-2026-72194 9.8 CRITICAL fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-72211 9.8 CRITICAL ntfs: grow index root value before reparent header update
CVE-2026-72210 9.8 CRITICAL ntfs: fix off-by-one in mapping pairs decoding bounds checks

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-2026-72236

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