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CVE-2026-68324— iommu/intel: Fix out-of-bounds memset in dmar_latency_disable()

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 5.14版本存在安全漏洞，该漏洞源于dmar_latency_disable()函数中memset大小计算错误，导致越界写，可能破坏相邻内存。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 55ee5e67a59a1b6f388d7a1c7b24022145f47a3e< 80f3605991461679c298ea2045c350ee3cf36de3 affected
55ee5e67a59a1b6f388d7a1c7b24022145f47a3e< 104d89cf5b01cb66ff975d91ed42f61b3904df53 affected
55ee5e67a59a1b6f388d7a1c7b24022145f47a3e< 3078d82e7fe9048a2b90a992e71af7cd7ef881fa affected
55ee5e67a59a1b6f388d7a1c7b24022145f47a3e< 866a35735e56b9dc81cbc33899255134adf6d8b3 affected
55ee5e67a59a1b6f388d7a1c7b24022145f47a3e< d06fea9b85f038690f55e72fe0c45e113715a85a affected
55ee5e67a59a1b6f388d7a1c7b24022145f47a3e< 0e28ca1c3204b51068579defc904a0dfba5e5c57 affected
55ee5e67a59a1b6f388d7a1c7b24022145f47a3e< 754f8efe45f87e3a9c6871b645b2f9d46d1b407b affected
5.14 affected
… +8 more rows
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I. Basic Information for CVE-2026-68324

Vulnerability Information
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Vulnerability Title
iommu/intel: Fix out-of-bounds memset in dmar_latency_disable()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommu/intel: Fix out-of-bounds memset in dmar_latency_disable() dmar_latency_disable() intends to zero out only the single latency_statistic entry for the given type, but the memset size was computed as sizeof(*lstat) * DMAR_LATENCY_NUM, which clears the entire array starting from &lstat[type]. When type > 0, this writes beyond the end of the allocated array, corrupting adjacent memory. Fix by using sizeof(*lstat) to clear only the target entry.
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 5.14版本存在安全漏洞，该漏洞源于dmar_latency_disable()函数中memset大小计算错误，导致越界写，可能破坏相邻内存。
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 55ee5e67a59a1b6f388d7a1c7b24022145f47a3e ~ 80f3605991461679c298ea2045c350ee3cf36de3 -
Linux Linux 5.14 -

II. Public POCs for CVE-2026-68324

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III. Intelligence Information for CVE-2026-68324

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Patches & Fixes for CVE-2026-68324 (5)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68324

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