CVE-2026-98564— net: dsa: mt7530: leave the MDIO IRQ mappings to regmap-irq
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： net: dsa: mt7530: 将 MDIO 中断映射交由 regmap-irq 管理 函数在 回调中清理了每个 PHY 的中断映射，但拥有该中断域的 regmap-irq 芯片是通过 （设备资源管理）机制注册的，因此其父中断只有在 返回后才会被释放。这导致交换机自身的 regmap-irq 线程仍可能尝试调度一个已被移除的映射：此时 返回 0， 返回 NULL，而 在未检查指针有效性的情况下尝试锁定 ，从而引发故障。与此同时，所连接的 PHY 设备也尚未归还这些中
Possible ATT&CK Techniques 2 AI
T1055 · Process Injection T1068 · Exploitation for Privilege EscalationAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 254f6b272e3b67bf31c42ee9da62a449d74d1478< 2357c682f6eaf639dec88c68b3c0c93a3b802635 |
affected |
254f6b272e3b67bf31c42ee9da62a449d74d1478< f306e465b5a2091cd3fe3dd0feb10cfc94cfb2f8 |
affected | ||
254f6b272e3b67bf31c42ee9da62a449d74d1478< 0d80ba0a204c6a16bd7778b50de578dff107c0fe |
affected | ||
6.15 |
affected | ||
< 6.15 |
unaffected | ||
6.18.55≤ 6.18.* |
unaffected | ||
7.2.9≤ 7.2.* |
unaffected | ||
7.3-rc5≤ * |
unaffected |
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I. Basic Information for CVE-2026-98564
Vulnerability Information
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Vulnerability Title
net: dsa: mt7530: leave the MDIO IRQ mappings to regmap-irq
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: mt7530: leave the MDIO IRQ mappings to regmap-irq
mt7530_remove_common() disposes the per-PHY interrupt mappings from
.remove, but the regmap-irq chip that owns the domain is devm-registered,
so its parent interrupt is only freed once .remove has returned. The
switch's own regmap-irq thread can therefore still dispatch on a mapping
that is already gone: irq_find_mapping() returns 0, irq_to_desc() returns
NULL and handle_nested_irq() locks desc->lock without checking it. The
attached PHYs have not given those interrupts back yet either, which the
kernel warns about a moment before the fault.
regmap_del_irq_chip() disposes the same mappings itself, after freeing the
parent interrupt and before removing the domain, so there is nothing left
for the driver to do here. Until it runs the descriptors stay alive, and a
late dispatch on one of them is harmless: dsa_unregister_switch() has freed
the PHY handlers by then, so handle_nested_irq() finds no action and
returns.
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
II. Public POCs for CVE-2026-98564
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-98564 (3)
Same Patch Batch · Linux · 2026-10-18 · 436 CVEs total
| CVE-2026-98583 | nfc: nfcmrvl: validate helper command length before pull | |
| 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-2026-98582 | nfc: st21nfca: validate received frame size | |
| CVE-2026-98594 | tg3: clean up PHYLIB resources on probe failure | |
| CVE-2026-98591 | bpf: Fix bounds check for skb-backed dynptrs | |
| CVE-2026-98592 | net: spacemit: clear TX descriptor on fragment mapping failure | |
| CVE-2026-98593 | s390/debug: Fix NULL pointer dereference in debug_info_copy() | |
| CVE-2026-98590 | bpf: Fix bpf_sock context code generation | |
| CVE-2026-98595 | udp: remove a disconnected socket from the 4-tuple hash table |
Showing top 20 of 436 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
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CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
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CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U -
CVE-2026-98865
sched_ext: Don't run ops.dequeue() with a DSQ lock held -
CVE-2026-98864
sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing
Same vendor: Linux
-
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U -
CVE-2026-98865
sched_ext: Don't run ops.dequeue() with a DSQ lock held -
CVE-2026-98864
sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing
V. Comments for CVE-2026-98564
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