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CVE-2026-98726— nvme-multipath: fix underflow in ANA log bounds 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.

在 Linux 内核中，以下漏洞已得到修复： nvme-multipath：修复 ANA 日志边界检查中的下溢问题 通过“识别控制器”（Identify Controller）命令所通告的 ANA 组数量，用于确定 ANA 日志缓冲区的大小。ANA 日志头和各组描述符会独立提供需要解析的组数量和命名空间 ID 数量。 原有的两项边界检查均先从一个不可信的对象尺寸中减去该值，再与当前偏移量进行比较。若该对象尺寸大于缓冲区容量， 类型的减法将发生下溢，导致解析器读取超出 缓冲区范围的数据。 修复方案改为：在执行首次减法

AI Predicted 8.8 Difficulty: Moderate EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba< 03a0c21f0fd7a872953aae5714303d8f38d1e567 affected
0d0b660f214dc4905db7b6bc998bad0c16dfb1ba< 49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe affected
0d0b660f214dc4905db7b6bc998bad0c16dfb1ba< e5cdb0c0a51e8ff49914ae16ef5360010c40cc85 affected
0d0b660f214dc4905db7b6bc998bad0c16dfb1ba< 63fa2d9c9c37020bd2703fe2a6a38027b5abeb15 affected
4.19 affected
< 4.19 unaffected
6.12.113≤ 6.12.* unaffected
6.18.56≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98726

Vulnerability Information
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Vulnerability Title
nvme-multipath: fix underflow in ANA log bounds checks
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: fix underflow in ANA log bounds checks The number of ANA groups advertised through Identify Controller sizes the ANA log buffer. The ANA log header and group descriptors independently supply the number of groups and namespace IDs to parse. Both bounds checks subtract an untrusted object size from ana_log_size before comparing the current offset. If the object is larger than the buffer, the size_t subtraction underflows and lets the parser read beyond ana_log_buf. Check the current offset before the first subtraction and compare each object size with the remaining buffer instead. This rejects inconsistent ANA data before dereferencing a truncated group descriptor or walking an oversized namespace ID array.
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 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba ~ 03a0c21f0fd7a872953aae5714303d8f38d1e567 -
Linux Linux 4.19 -

II. Public POCs for CVE-2026-98726

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III. Intelligence Information for CVE-2026-98726

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Patches & Fixes for CVE-2026-98726 (4)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98719 KVM: SEV: Nullify "have run CPUs" mask pointer when freeing it
CVE-2026-98733 Bluetooth: hci_core: Serialize fragmented ISO packet queueing
CVE-2026-98732 Bluetooth: btintel: fix buffer over-read in btintel_hw_error()
CVE-2026-98731 Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
CVE-2026-98730 Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()
CVE-2026-98729 x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h
CVE-2026-98728 tpm: fix off-by-four bounds check in tpm2_get_random()
CVE-2026-98727 nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
CVE-2026-98725 nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
CVE-2026-98724 nvmet: pci-epf: reject too-short SGL segments
CVE-2026-98723 nvmet: copy the hostid into the ctrl before creating PR pc_refs
CVE-2026-98722 mtd: block2mtd: Fix divide error when erase_size is zero
CVE-2026-98721 mtd: rawnand: cadence: Initialize IRQ state before requesting IRQ
CVE-2026-98720 KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified
CVE-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown
CVE-2026-98711 wifi: cw1200: fix TX padding OOB read leaking heap data to device
CVE-2026-98710 wifi: iwlegacy: 3945: free EEPROM data on remove
CVE-2026-98709 wifi: mac80211: count only matching reservations in reserved switch
CVE-2026-98712 KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
CVE-2026-98708 wifi: mac80211: keep paired old chanctx alive

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98726

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