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CVE-2026-98651— KVM: s390: Properly handle NULL pointer in dat_cond_set_storage_key()

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： KVM：s390：在 dat_cond_set_storage_key() 中正确处理空指针 某些调用方会传入 NULL 作为 oldkey 参数。调用 page_cond_set_storage_key() 会导致该空指针被解引用。 修复方法：增加空指针检查，并将该指针赋值给一个临时的局部哑变量，从而避免系统崩溃。

AI Predicted 7.8 Difficulty: Moderate

Possible ATT&CK Techniques 2 AI

T1068.002 T1068.001

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 8e03e8316eb242af307d1c789d09f1a1457cf9a3< 75867536746ab2d034488a6a93ee6cde83553342 affected
8e03e8316eb242af307d1c789d09f1a1457cf9a3< 88e22ffd1e46b95e40a6afabe486deb1d31a3ae1 affected
7.0 affected
< 7.0 unaffected
7.2.9≤ 7.2.* unaffected
7.3-rc1≤ * unaffected
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I. Basic Information for CVE-2026-98651

Vulnerability Information
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Vulnerability Title
KVM: s390: Properly handle NULL pointer in dat_cond_set_storage_key()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Properly handle NULL pointer in dat_cond_set_storage_key() Some callers pass NULL as oldkey. Calling page_cond_set_storage_key() will cause that NULL pointer to get dereferenced. Fix by checking for NULL and assigning the pointer to a dummy local variable to avoid crashes.
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 8e03e8316eb242af307d1c789d09f1a1457cf9a3 ~ 75867536746ab2d034488a6a93ee6cde83553342 -
Linux Linux 7.0 -

II. Public POCs for CVE-2026-98651

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III. Intelligence Information for CVE-2026-98651

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Patches & Fixes for CVE-2026-98651 (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

V. Comments for CVE-2026-98651

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