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CVE-2026-98865— sched_ext: Don't run ops.dequeue() with a DSQ lock held

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： sched_ext：在持有 DSQ（调度队列）锁时，不要调用 ops.dequeue() ops.dequeue() 在 consume（消费）和 move（移动）路径上（即 scx_consume_dispatch_q() 和 move_task_between_dsqs()）被调用时，源用户 DSQ 的锁仍然处于持有状态。如果某个 BPF 调度器在 ops.dequeue() 中尝试对源用户 DSQ 加锁（例如通过 bpf_iter_scx_dsq 进行迭代），就会

AI Predicted 7.8 Difficulty: Moderate

Possible ATT&CK Techniques 2 AI

T1055 · Process Injection T1068.004

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d< fe499ae9da46e297f578d4346c4c8e338c3118db affected
ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d< cb86607ada73185f321baa7f9d94a08a3a40bbf5 affected
7.1 affected
< 7.1 unaffected
7.2.10≤ 7.2.* unaffected
7.3-rc5≤ * unaffected
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I. Basic Information for CVE-2026-98865

Vulnerability Information
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Vulnerability Title
sched_ext: Don't run ops.dequeue() with a DSQ lock held
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Don't run ops.dequeue() with a DSQ lock held ops.dequeue() is invoked with the source user DSQ's lock still held on the consume and move paths (scx_consume_dispatch_q(), move_task_between_dsqs()). A BPF scheduler which locks the source user DSQ from ops.dequeue() - e.g. by iterating it with bpf_iter_scx_dsq - self-deadlocks. ops.dequeue() can only call the "any" kfuncs and none of them can lock a builtin DSQ, so the global and bypass paths can't deadlock; however, all DSQ locks share one lockdep class, so iterating any user DSQ from ops.dequeue() on those paths trips the recursion check. Move the invocation after the DSQ unlock on all three paths. SCX_TASK_IN_CUSTODY is cleared under the lock serializing the transfer so that the callback is invoked exactly once.
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 ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d ~ fe499ae9da46e297f578d4346c4c8e338c3118db -
Linux Linux 7.1 -

II. Public POCs for CVE-2026-98865

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III. Intelligence Information for CVE-2026-98865

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Patches & Fixes for CVE-2026-98865 (2)

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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