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CVE-2026-43261— arm64: Add support for TSV110 Spectre-BHB mitigation

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于TSV110处理器易受Spectre-BHB攻击，可能导致通过分支预测侧信道泄露信息。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1570 · Lateral Tool Transfer

Affected Version Matrix 30

VendorProduct Version RangeStatus
Linux Linux e192c8baa69ac8a5585d61ac535aa1e5eb795e80< 598c11dd4f4a9de31d854fcb9702f54c1c70f0d0 affected
4bbfd0c280254b273c564767021bb9b0f945148e< a8d0ad5d990b050a6db74218a34b5529085e16b8 affected
558c303c9734af5a813739cd284879227f7297d2< cccf96c49f61e47d9332d6a4d1c7fe9a2df44440 affected
558c303c9734af5a813739cd284879227f7297d2< fd7e360845d331f542854d552469544182e61134 affected
558c303c9734af5a813739cd284879227f7297d2< 5dbe1f14359735fa50ba0dd4a496125b5bc7f422 affected
558c303c9734af5a813739cd284879227f7297d2< fd51d47fcacec3ca027eb65d8c44853d3b6cea95 affected
558c303c9734af5a813739cd284879227f7297d2< ad0c356cae164ed5dbd1f4cfd438e46faa5292cb affected
558c303c9734af5a813739cd284879227f7297d2< e3baa5d4b361276efeb87b20d8beced451a7dbd5 affected
… +22 more rows
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I. Basic Information for CVE-2026-43261

Vulnerability Information
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Vulnerability Title
arm64: Add support for TSV110 Spectre-BHB mitigation
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: arm64: Add support for TSV110 Spectre-BHB mitigation The TSV110 processor is vulnerable to the Spectre-BHB (Branch History Buffer) attack, which can be exploited to leak information through branch prediction side channels. This commit adds the MIDR of TSV110 to the list for software mitigation.
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于TSV110处理器易受Spectre-BHB攻击，可能导致通过分支预测侧信道泄露信息。
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 e192c8baa69ac8a5585d61ac535aa1e5eb795e80 ~ 598c11dd4f4a9de31d854fcb9702f54c1c70f0d0 -
Linux Linux 5.17 -

II. Public POCs for CVE-2026-43261

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III. Intelligence Information for CVE-2026-43261

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Patches & Fixes for CVE-2026-43261 (8)

Same Patch Batch · Linux · 2026-05-06 · 224 CVEs total

CVE-2026-43186 9.8 CRITICAL ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()
CVE-2026-43185 9.8 CRITICAL ksmbd: fix signededness bug in smb_direct_prepare_negotiation()
CVE-2026-43125 9.8 CRITICAL dlm: validate length in dlm_search_rsb_tree
CVE-2026-43208 9.8 CRITICAL net: do not pass flow_id to set_rps_cpu()
CVE-2026-43198 9.8 CRITICAL tcp: fix potential race in tcp_v6_syn_recv_sock()
CVE-2026-43114 9.4 CRITICAL netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
CVE-2026-43117 9.1 CRITICAL btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
CVE-2026-43083 9.1 CRITICAL net: ioam6: fix OOB and missing lock
CVE-2026-43197 9.1 CRITICAL netconsole: avoid OOB reads, msg is not nul-terminated
CVE-2026-43232 8.8 HIGH net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-43215 8.8 HIGH cifs: Fix locking usage for tcon fields
CVE-2026-43112 8.8 HIGH fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-43113 8.8 HIGH wifi: wl1251: validate packet IDs before indexing tx_frames
CVE-2026-43187 8.8 HIGH xfs: delete attr leaf freemap entries when empty
CVE-2026-43110 8.8 HIGH wifi: brcmfmac: validate bsscfg indices in IF events
CVE-2026-43283 8.8 HIGH net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-43176 8.8 HIGH wifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-43249 8.8 HIGH 9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-43158 8.8 HIGH xfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-43172 8.8 HIGH wifi: iwlwifi: fix 22000 series SMEM parsing

Showing top 20 of 224 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43261

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