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CVE-2026-98724— nvmet: pci-epf: reject too-short SGL segments

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，以下漏洞已被修复： nvmet: pci-epf：拒绝过短的 SGL 段 主机可控制 SGL（散射 - 聚集列表）段的长度。若该长度非零但小于一个 SGL 描述符所需的大小，则会导致 nr_descs 变为零，从而使 nvmet_pci_epf_get_sgl_segment() 函数在已分配缓冲区之外读取 sgls[-1] 的类型字节。如果该字节恰好包含一个有效的段描述符类型，该函数还会复制其前 16 个字节，并返回一个负数的描述符计数。 该越界读取问题在 3 次 KASAN 启动测试中均

AI Predicted 7.8 Difficulty: Moderate EPSS 0.20% · P9

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186< 2423a05dd0f21330c47ce0ae1cb54a8b0be821e2 affected
0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186< 472df1d103dbe3e9d09156f0667e36180e912c46 affected
0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186< 5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9 affected
6.14 affected
< 6.14 unaffected
6.18.56≤ 6.18.* unaffected
7.2.10≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-98724

Vulnerability Information
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Vulnerability Title
nvmet: pci-epf: reject too-short SGL segments
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvmet: pci-epf: reject too-short SGL segments The host controls an SGL segment's length. A nonzero length smaller than one SGL descriptor makes nr_descs zero, so nvmet_pci_epf_get_sgl_segment() reads the type byte of sgls[-1] outside the allocated buffer. If that byte contains a segment descriptor type, the function also copies the preceding 16 bytes and returns a negative descriptor count. The read was reproduced in 3/3 KASAN boots with only the host transfer mocked by a KUnit test: BUG: KASAN: slab-out-of-bounds in nvmet_pci_epf_get_sgl_segment Read of size 1 by task kunit_try_catch Call Trace: nvmet_pci_epf_get_sgl_segment nvmet_pci_epf_short_sgl_test Kernel panic - not syncing: KASAN: panic_on_warn set ... Reject segments that cannot hold one descriptor before allocating or transferring their contents.
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 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 ~ 2423a05dd0f21330c47ce0ae1cb54a8b0be821e2 -
Linux Linux 6.14 -

II. Public POCs for CVE-2026-98724

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III. Intelligence Information for CVE-2026-98724

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Patches & Fixes for CVE-2026-98724 (3)

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-2026-98726 nvme-multipath: fix underflow in ANA log bounds checks
CVE-2026-98725 nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
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

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