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CVE-2026-72428— bpf: Fix stack slot index in nospec checks

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存在安全漏洞，该漏洞源于BPF验证器在nospec检查中使用了错误的栈槽索引，导致部分栈写入未获得nospec结果，可能削弱Spectre v4消毒机制。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1564.008 · Email Hiding Rules

Affected Version Matrix 25

VendorProduct Version RangeStatus
Linux Linux 0e9280654aa482088ee6ef3deadef331f5ac5fb0< e62268e695075a481a6c4feeb022c19cf57422a6 affected
2039f26f3aca5b0e419b98f65dd36481337b86ee< a71eb8f730a91271cf47ce291e785b6b7e54622f affected
2039f26f3aca5b0e419b98f65dd36481337b86ee< ca119656baa8f48a56e0c2f3ab63fdd33ca9e307 affected
2039f26f3aca5b0e419b98f65dd36481337b86ee< 475405593de2b796224c6297aece44f321195919 affected
2039f26f3aca5b0e419b98f65dd36481337b86ee< f1471aa76d74e0df3b2a90731ca0208f498c670b affected
2039f26f3aca5b0e419b98f65dd36481337b86ee< 68b41e68a62299f26cb16af422b5c7d1c69dafd9 affected
2039f26f3aca5b0e419b98f65dd36481337b86ee< db8f1dcf5950b91886b9df4270bc816370d292c1 affected
2039f26f3aca5b0e419b98f65dd36481337b86ee< d1d53aa30ab3b5ae89161c9cc840b3f7489ad386 affected
… +17 more rows
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I. Basic Information for CVE-2026-72428

Vulnerability Information
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Vulnerability Title
bpf: Fix stack slot index in nospec checks
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stack slot index in nospec checks check_stack_write_fixed_off() computes the byte slot for a fixed-offset stack write as -off - 1, and records each written byte in slot_type[] with (slot - i) % BPF_REG_SIZE. The Spectre v4 sanitization pre-check uses slot_type[i] instead. For a 4-byte write at fp-8 after the lower half of fp-8 has been zeroed, the pre-check scans bytes 0..3 and sees STACK_ZERO while the actual write updates bytes 7..4. That can leave the second half-slot write without nospec_result even though the bytes being overwritten still require sanitization. Use the same slot index in the sanitization pre-check that the write path uses when updating slot_type[].
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存在安全漏洞，该漏洞源于BPF验证器在nospec检查中使用了错误的栈槽索引，导致部分栈写入未获得nospec结果，可能削弱Spectre v4消毒机制。
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 0e9280654aa482088ee6ef3deadef331f5ac5fb0 ~ e62268e695075a481a6c4feeb022c19cf57422a6 -
Linux Linux 5.14 -

II. Public POCs for CVE-2026-72428

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III. Intelligence Information for CVE-2026-72428

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Patches & Fixes for CVE-2026-72428 (7)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

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-2026-74475 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-2026-74309 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-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72319 9.8 CRITICAL ipvs: ensure inner headers in ICMP errors are in headroom
CVE-2026-72220 9.8 CRITICAL sunrpc: harden rq_procinfo lifecycle to prevent double-free
CVE-2026-72217 9.8 CRITICAL SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-74384 9.8 CRITICAL nvme-multipath: fix flex array size in struct nvme_ns_head
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-72210 9.8 CRITICAL ntfs: fix off-by-one in mapping pairs decoding bounds checks
CVE-2026-72211 9.8 CRITICAL ntfs: grow index root value before reparent header update
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-74268 9.8 CRITICAL tcp: clear sock_ops cb flags before force-closing a child socket
CVE-2026-72207 9.8 CRITICAL ntfs: not change 0-byte $DATA attribute to non-resident
CVE-2026-74267 9.8 CRITICAL net/sched: sch_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring q

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72428

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