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CVE-2026-80963— dm-stats: fix a crash if allocation of per-cpu data fails

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.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于分配每CPU数据失败时，dm_stat_free函数未检查s->stat_percpu[cpu]是否为NULL，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1531 · Account Access Removal

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< e45f0b0c41139810ff395ba2f3cfca1460a5b8a6 affected
fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< 9805d87d0e26c68ee69da3928e665214d2e2851a affected
fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< 564d17573ef643c13cf6e9015124a205fa65e704 affected
fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< 389a50d094e13724f5f45e6d9d6ef734c98ba291 affected
fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< c3f211b7a277dd404b4e7d23095be964b5b46a27 affected
fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< 74210fa072960a18bb0eead487585452af722e4f affected
fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< 0c8f7870ed3ebd512f090d7714cc2c556b9e5c75 affected
fd2ed4d252701d3bbed4cd3e3d267ad469bb832a< cc87e26d9cce22061dc21e51e11afef29dbbc36a affected
… +10 more rows
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I. Basic Information for CVE-2026-80963

Vulnerability Information
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Vulnerability Title
dm-stats: fix a crash if allocation of per-cpu data fails
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dm-stats: fix a crash if allocation of per-cpu data fails If "dm_kvzalloc(percpu_alloc_size, cpu_to_node(cpu))" fails, the code jumps to the "out" label and calls dm_stat_free. dm_stat_free does "for_each_possible_cpu(cpu) { dm_kvfree(s->stat_percpu[cpu][0].histogram, s->histogram_alloc_size);", which crashes with NULL pointer dereference if s->stat_percpu[cpu] is NULL. This commit fixes the bug by testing s->stat_percpu[cpu] for NULL before using it.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于分配每CPU数据失败时，dm_stat_free函数未检查s->stat_percpu[cpu]是否为NULL，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux fd2ed4d252701d3bbed4cd3e3d267ad469bb832a ~ e45f0b0c41139810ff395ba2f3cfca1460a5b8a6 -
Linux Linux 3.12 -

II. Public POCs for CVE-2026-80963

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III. Intelligence Information for CVE-2026-80963

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Patches & Fixes for CVE-2026-80963 (8)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89688 9.8 CRITICAL nfsd: drop the stateid, not the stateowner, on seqid_op replay retry
CVE-2026-89656 9.8 CRITICAL libceph: reject buckets with mismatched CRUSH ids
CVE-2026-89655 9.8 CRITICAL ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock
CVE-2026-89658 9.8 CRITICAL NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup
CVE-2026-89660 9.8 CRITICAL NFSD: Prevent client use-after-free during admin state revocation
CVE-2026-89659 9.8 CRITICAL NFSD: Prevent client use-after-free during delegation revoke
CVE-2026-89662 9.8 CRITICAL NFSD: Prevent lock owner use-after-free during client teardown
CVE-2026-89669 9.8 CRITICAL nfsd: initialize copy-notify stateid before publishing it
CVE-2026-89674 9.8 CRITICAL nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget
CVE-2026-89675 9.8 CRITICAL nfsd: fix UAF in async copy cancel and shutdown
CVE-2026-89676 9.8 CRITICAL nfsd: fix stale s2s_cp_stateids IDR entry for async COPY
CVE-2026-89677 9.8 CRITICAL nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()
CVE-2026-89681 9.8 CRITICAL nfsd: fix layout fence worker double-reference race
CVE-2026-89686 9.8 CRITICAL nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke
CVE-2026-89703 9.8 CRITICAL nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
CVE-2026-89479 9.8 CRITICAL sctp: stop processing a packet once its association is deleted
CVE-2026-89478 9.8 CRITICAL sctp: drop a chunk if its transport was removed
CVE-2026-89702 9.8 CRITICAL nfsd: size fh_verify server sockaddr slot by xpt_locallen
CVE-2026-89482 9.8 CRITICAL nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89708 9.8 CRITICAL nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80963

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