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CVE-2026-98854— of/overlay: only treat a positive changeset id as registered

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： of/overlay：仅将正值的变更集 ID 视为已注册 函数在检查返回值之前，就将 的返回值存储到了 中。当分配失败时，存储的 ID 为负值；此时 中的 条件判断会通过，导致以负 ID 调用 ，并对尚未初始化的 执行 操作。若在此处发生分配失败，将导致对 NULL 指针的解引用。 修复方法是：修改 ，使其仅将严格为正的 ID 视为已注册。该函数的其余部分原本就能处理部分初始化的 结构，因此错误路径仍保持为简单的 。

AI Predicted 8.8 Difficulty: Moderate

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 61b4de4e0b384f4a22c55c3bada604da49cec4e1< c08a54df9d33dcd6ff089adc9434b2c008af3a39 affected
61b4de4e0b384f4a22c55c3bada604da49cec4e1< 0d1525fdcd3355672b7485d61e55df6824ab5ad1 affected
61b4de4e0b384f4a22c55c3bada604da49cec4e1< c875407c34dadaef0599834ad9c815f4c9f50d15 affected
61b4de4e0b384f4a22c55c3bada604da49cec4e1< 44081d708b5b885487bac792db78324b7b4c267d affected
4.15 affected
< 4.15 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-2026-98854

Vulnerability Information
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Vulnerability Title
of/overlay: only treat a positive changeset id as registered
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. An allocation failure at that point dereferences NULL. Make free_overlay_changeset() treat only a strict-positive id as registered. The rest of the function already copes with a partially-initialized ovcs, so the error path stays a plain goto err_free_ovcs.
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 61b4de4e0b384f4a22c55c3bada604da49cec4e1 ~ c08a54df9d33dcd6ff089adc9434b2c008af3a39 -
Linux Linux 4.15 -

II. Public POCs for CVE-2026-98854

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III. Intelligence Information for CVE-2026-98854

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Patches & Fixes for CVE-2026-98854 (4)

Same Patch Batch · Linux · 2026-10-18 · 436 CVEs total

CVE-2026-98582 nfc: st21nfca: validate received frame size
CVE-2026-98568 vxlan: use one headroom snapshot for neighbour replies
CVE-2026-98570 net: ipv6: keep room for the mac header in dst_dev_overhead()
CVE-2026-98571 net: stmmac: clear stale buf->page after recycling on skb build failure
CVE-2026-98572 bpf: Fix immediate JMP JEQ/JNE on MIPS32
CVE-2026-98573 net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()
CVE-2026-98574 net: bcmgenet: stop Tx NAPI before disabling the queues
CVE-2026-98575 nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()
CVE-2026-98576 nfc: llcp: fix slab-out-of-bounds reads when logging service names
CVE-2026-98577 nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()
CVE-2026-98578 nfc: st21nfca: validate ISO15693 inventory length
CVE-2026-98579 nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure
CVE-2026-98580 nfc: llcp: Fix race condition in accept_queue lifecycle
CVE-2026-98581 nfc: llcp: Fix list corruption / refcount desync in nfc_llcp_recv_dm()
CVE-2026-98593 s390/debug: Fix NULL pointer dereference in debug_info_copy()
CVE-2026-98590 bpf: Fix bpf_sock context code generation
CVE-2026-98591 bpf: Fix bounds check for skb-backed dynptrs
CVE-2026-98592 net: spacemit: clear TX descriptor on fragment mapping failure
CVE-2026-98589 bpf: Reject pkt arguments in mutating subprogs
CVE-2026-98594 tg3: clean up PHYLIB resources on probe failure

Showing top 20 of 436 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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