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CVE-2026-72489— staging: nvec: fix use-after-free in nvec_rx_completed()

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nvec_rx_completed()函数在释放消息后仍访问其数据，可能导致释放后重用。

CVSS 8.4 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1135 · Network Share Discovery

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d6bdcf2e1019351cbc176e963b7756766bdd8721< 6b2ea886ebdae44a2394029844a4e78f58e1587d affected
d6bdcf2e1019351cbc176e963b7756766bdd8721< a37625c7b688fcf68a54263528eccbabfd7fa17a affected
d6bdcf2e1019351cbc176e963b7756766bdd8721< 9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89 affected
d6bdcf2e1019351cbc176e963b7756766bdd8721< 08626fcfe12308ca3f8b22c538ba7dee0b2dce7a affected
d6bdcf2e1019351cbc176e963b7756766bdd8721< f19a5bc059051143c489dd6f79a0f9c3bfd13aea affected
d6bdcf2e1019351cbc176e963b7756766bdd8721< bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90 affected
d6bdcf2e1019351cbc176e963b7756766bdd8721< 5de04caa46b635e180cecbd164e333eca535db94 affected
d6bdcf2e1019351cbc176e963b7756766bdd8721< 26813881181deb3a32fbb59eadb2599cbe8423f6 affected
… +10 more rows
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I. Basic Information for CVE-2026-72489

Vulnerability Information
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Vulnerability Title
staging: nvec: fix use-after-free in nvec_rx_completed()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type. Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. Reading nvec->rx->data[0] after freeing the message is therefore a use-after-free. Fix this by saving the message type byte before calling nvec_msg_free(), then using the saved value for the battery quirk check.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/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存在安全漏洞，该漏洞源于nvec_rx_completed()函数在释放消息后仍访问其数据，可能导致释放后重用。
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 d6bdcf2e1019351cbc176e963b7756766bdd8721 ~ 6b2ea886ebdae44a2394029844a4e78f58e1587d -
Linux Linux 3.2 -

II. Public POCs for CVE-2026-72489

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III. Intelligence Information for CVE-2026-72489

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Patches & Fixes for CVE-2026-72489 (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-2026-72489

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