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CVE-2026-89949— batman-adv: dat: avoid unaligned fault in IP extraction

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： batman-adv: dat: 避免 IP 提取过程中的非对齐故障 无论 SKB 中 ARP 数据包的对齐方式如何， 或 在某些缺乏原生非对齐读取支持的硬件上，会发生非对齐访问问题。 请使用 函数，以便在所有体系结构上正确处理这一问题。

AI Predicted 3.7 Difficulty: Hard EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1202 · Indirect Command Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< b1bbc694ca51adb8dbed3f3235b4fcbdb44e0e20 affected
5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< 15dbfb37f0e1a085d48deeb8f5238e9d28127dde affected
5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< a170d4617e8cca05a1314de61728a262ef272782 affected
5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< c74a4acf41d19f21199dec2d6c813c90d31cd02c affected
5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< 91c99b4e152023c7d458a5dedd52d2b0d7df4ce3 affected
5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< 1cfa7d5f70d54cb8c7e82df739430782d1996ee1 affected
5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< 0c2df865338bbf92aa45b9253e5f9b8ef2d9992f affected
5c3a0e5535933349a5d6e6bc8b704e0611f21d3f< 0121afa52cdb88cfb4d5d7bd126a23a9100121d8 affected
… +10 more rows
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I. Basic Information for CVE-2026-89949

Vulnerability Information
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Vulnerability Title
batman-adv: dat: avoid unaligned fault in IP extraction
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: avoid unaligned fault in IP extraction Independent of the alignment of the ARP packet in the SKB, either the batadv_arp_ip_src or the batadv_arp_ip_dst will have an unaligned access (on HW without native unaligned read support). Use get_unaligned() to handle this properly on all architectures.
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 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f ~ b1bbc694ca51adb8dbed3f3235b4fcbdb44e0e20 -
Linux Linux 3.8 -

II. Public POCs for CVE-2026-89949

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III. Intelligence Information for CVE-2026-89949

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Other References for CVE-2026-89949 (8)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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