---
id: CVE-2026-43261
title: 'arm64: Add support for TSV110 Spectre-BHB mitigation'
summary: |-
  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 le…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e192c8baa69ac8a5585d61ac535aa1e5eb795e80 <
    598c11dd4f4a9de31d854fcb9702f54c1c70f0d0
  - >-
    Linux >= 4bbfd0c280254b273c564767021bb9b0f945148e <
    a8d0ad5d990b050a6db74218a34b5529085e16b8
  - >-
    Linux >= 558c303c9734af5a813739cd284879227f7297d2 <
    cccf96c49f61e47d9332d6a4d1c7fe9a2df44440
  - >-
    Linux >= 558c303c9734af5a813739cd284879227f7297d2 <
    fd7e360845d331f542854d552469544182e61134
  - >-
    Linux >= 558c303c9734af5a813739cd284879227f7297d2 <
    5dbe1f14359735fa50ba0dd4a496125b5bc7f422
  - >-
    Linux >= 558c303c9734af5a813739cd284879227f7297d2 <
    fd51d47fcacec3ca027eb65d8c44853d3b6cea95
  - >-
    Linux >= 558c303c9734af5a813739cd284879227f7297d2 <
    ad0c356cae164ed5dbd1f4cfd438e46faa5292cb
  - >-
    Linux >= 558c303c9734af5a813739cd284879227f7297d2 <
    e3baa5d4b361276efeb87b20d8beced451a7dbd5
  - Linux 4dd8aae585a51a1d276911fe19096ad90144e9fe
  - Linux 3e3904125fccd042fda24294624e8f66699fd06d
  - Linux c20d551744797000c4af993f7d59ef8c69732949
  - Linux 9013fd4bc958b33c3b4d5a2eaf4ded9857600395
  - Linux 0b2bf1b37b5ebd90e69e30d8c2d6e1cd0c1f37b4
  - Linux >= 5.10.105 < 5.10.252
  - Linux >= 5.15.28 < 5.15.202
  - Linux >= 4.9.310 < 4.10
  - Linux >= 4.14.275 < 4.15
  - Linux >= 4.19.236 < 4.20
  - Linux >= 5.4.186 < 5.5
  - Linux >= 5.16.14 < 5.17
  - Linux 5.17
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T15:32:15.330551Z'
published: '2026-05-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:32:38.191Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43261'
references:
  - url: 'https://git.kernel.org/stable/c/598c11dd4f4a9de31d854fcb9702f54c1c70f0d0'
  - url: 'https://git.kernel.org/stable/c/a8d0ad5d990b050a6db74218a34b5529085e16b8'
  - url: 'https://git.kernel.org/stable/c/cccf96c49f61e47d9332d6a4d1c7fe9a2df44440'
  - url: 'https://git.kernel.org/stable/c/fd7e360845d331f542854d552469544182e61134'
  - url: 'https://git.kernel.org/stable/c/5dbe1f14359735fa50ba0dd4a496125b5bc7f422'
  - url: 'https://git.kernel.org/stable/c/fd51d47fcacec3ca027eb65d8c44853d3b6cea95'
  - url: 'https://git.kernel.org/stable/c/ad0c356cae164ed5dbd1f4cfd438e46faa5292cb'
  - url: 'https://git.kernel.org/stable/c/e3baa5d4b361276efeb87b20d8beced451a7dbd5'
tags:
  - cve.org
epss: 0.00128
epssPercentile: 0.02475
ingestedAt: '2026-11-06T15:54:04.000Z'
---

## Overview

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.

## Affected

- `Linux >= e192c8baa69ac8a5585d61ac535aa1e5eb795e80 < 598c11dd4f4a9de31d854fcb9702f54c1c70f0d0`
- `Linux >= 4bbfd0c280254b273c564767021bb9b0f945148e < a8d0ad5d990b050a6db74218a34b5529085e16b8`
- `Linux >= 558c303c9734af5a813739cd284879227f7297d2 < cccf96c49f61e47d9332d6a4d1c7fe9a2df44440`
- `Linux >= 558c303c9734af5a813739cd284879227f7297d2 < fd7e360845d331f542854d552469544182e61134`
- `Linux >= 558c303c9734af5a813739cd284879227f7297d2 < 5dbe1f14359735fa50ba0dd4a496125b5bc7f422`
- `Linux >= 558c303c9734af5a813739cd284879227f7297d2 < fd51d47fcacec3ca027eb65d8c44853d3b6cea95`
- `Linux >= 558c303c9734af5a813739cd284879227f7297d2 < ad0c356cae164ed5dbd1f4cfd438e46faa5292cb`
- `Linux >= 558c303c9734af5a813739cd284879227f7297d2 < e3baa5d4b361276efeb87b20d8beced451a7dbd5`
- `Linux 4dd8aae585a51a1d276911fe19096ad90144e9fe`
- `Linux 3e3904125fccd042fda24294624e8f66699fd06d`
- `Linux c20d551744797000c4af993f7d59ef8c69732949`
- `Linux 9013fd4bc958b33c3b4d5a2eaf4ded9857600395`
- `Linux 0b2bf1b37b5ebd90e69e30d8c2d6e1cd0c1f37b4`
- `Linux >= 5.10.105 < 5.10.252`
- `Linux >= 5.15.28 < 5.15.202`
- `Linux >= 4.9.310 < 4.10`
- `Linux >= 4.14.275 < 4.15`
- `Linux >= 4.19.236 < 4.20`
- `Linux >= 5.4.186 < 5.5`
- `Linux >= 5.16.14 < 5.17`
- `Linux 5.17`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.