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CVE-2026-98931— mtd: spinand: fix NULL pointer dereference with no ECC engine

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： mtd: spinand: 修复在无 ECC 引擎时发生的空指针解引用问题 当设备树（DT）中设置了 "nand-no-ecc-engine" 时， 会进入 路径并返回成功，但此时 仍为 NULL。然而，SPI-NAND 代码仍无条件地解引用该指针以检测是否为流水线式引擎，导致探测此类设备时立即触发内核崩溃（oops）。 为避免在多处重复编写检查逻辑，本次修复在 NAND 核心中新增了辅助函数 ，将 NULL 检查整合到流水线引擎的比对逻辑中，并在所有相关位置统一使用该

AI Predicted 7.8 Difficulty: Moderate

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux f9d7c7265bcff7d9a17425a8cddf702e8fe159c2< 77c449c9c946fc420008dc55cd30f53749c915e4 affected
f9d7c7265bcff7d9a17425a8cddf702e8fe159c2< 3c765fd5212c1bbc71568b1518a7ec963a7040b4 affected
f9d7c7265bcff7d9a17425a8cddf702e8fe159c2< 80e8b0ea73ba295e92dfb6cf1c41df9da64234c6 affected
f9d7c7265bcff7d9a17425a8cddf702e8fe159c2< fc2f651f520394893b14b75281a01e502bfa73bb affected
f9d7c7265bcff7d9a17425a8cddf702e8fe159c2< b890e6163761ddb580cc74f43e15f8bbde15647e affected
5.18 affected
< 5.18 unaffected
6.6.160≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-98931

Vulnerability Information
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Vulnerability Title
mtd: spinand: fix NULL pointer dereference with no ECC engine
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mtd: spinand: fix NULL pointer dereference with no ECC engine When "nand-no-ecc-engine" is set in DT, nanddev_get_ecc_engine() takes the NAND_ECC_ENGINE_TYPE_NONE path and returns success while leaving nand->ecc.engine NULL. The SPI-NAND code nevertheless dereferences it unconditionally to test for a pipelined engine, so probing such a device oopses immediately. Rather than open-coding the test three times, add a nand_ecc_is_pipelined() helper to the NAND core that folds the NULL check into the integration comparison, and use it everywhere. Future callers then cannot reintroduce the problem.
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 f9d7c7265bcff7d9a17425a8cddf702e8fe159c2 ~ 77c449c9c946fc420008dc55cd30f53749c915e4 -
Linux Linux 5.18 -

II. Public POCs for CVE-2026-98931

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III. Intelligence Information for CVE-2026-98931

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Patches & Fixes for CVE-2026-98931 (5)

Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total

CVE-2026-98938 rust: irq: pass RegistrationInner as cookie to request_irq
CVE-2026-98951 riscv: ptrace: Zero-initialize regset buffers before copyin
CVE-2026-98950 flow_dissector: avoid u16 truncation of hlen in bpf_flow_dissect()
CVE-2026-98949 drm/imagination: Fix reference and vm_bo handling in remap()
CVE-2026-98948 mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
CVE-2026-98947 vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
CVE-2026-98946 drm/vc4: Disable the V3D interrupt across runtime suspend
CVE-2026-98945 HID: steam: Rearrange teardown sequence
CVE-2026-98944 HID: steam: Refactor registration
CVE-2026-98943 HID: steam: Clean up locking
CVE-2026-98942 sched_ext: Build the cid tables privately and publish them with RCU
CVE-2026-98941 ext4: don't enable large folios on encrypted inodes
CVE-2026-98940 ASoC: qcom: lpass-cpu: use DAI table index for playback constraints
CVE-2026-98939 x86/mm: Drop unnecessary PMD page copy when freeing
CVE-2026-98926 drm/amd/display: Remove sink usage from DPMS
CVE-2026-98929 macsec: initialize SecY before registering the netdevice
CVE-2026-98928 KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
CVE-2026-98927 KVM: arm64: nv: Fix life cycle of the nested_mmus array
CVE-2026-98930 KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
CVE-2026-98925 bpf, sockmap: Fix self-redirect copied_seq double-counting

Showing top 20 of 218 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98931

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