CVE-2026-43261

arm64: Add support for TSV110 Spectre-BHB mitigation

Published May 6, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

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

Linux

affected

Version	Status	Constraints
`5.17`	affected	—
`0`	unaffected	< 5.17
`5.10.252`	unaffected	≤ 5.10.*
`5.15.202`	unaffected	≤ 5.15.*
`6.1.165`	unaffected	≤ 6.1.*
`6.6.128`	unaffected	≤ 6.6.*
`6.12.75`	unaffected	≤ 6.12.*
`6.18.16`	unaffected	≤ 6.18.*
`6.19.6`	unaffected	≤ 6.19.*
`7.0`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,598c11dd4f4a9de31d854fcb9702f54c1c70f0d0)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a8d0ad5d990b050a6db74218a34b5529085e16b8)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,cccf96c49f61e47d9332d6a4d1c7fe9a2df44440)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,fd7e360845d331f542854d552469544182e61134)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,5dbe1f14359735fa50ba0dd4a496125b5bc7f422)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,fd51d47fcacec3ca027eb65d8c44853d3b6cea95)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ad0c356cae164ed5dbd1f4cfd438e46faa5292cb)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e3baa5d4b361276efeb87b20d8beced451a7dbd5)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[5.10.252,5.11.0)`	unaffected	semver	—
`[5.15.202,5.16.0)`	unaffected	semver	—
`[6.1.165,6.2.0)`	unaffected	semver	—
`[6.6.128,6.7.0)`	unaffected	semver	—
`[6.12.75,6.13.0)`	unaffected	semver	—
`[6.18.16,6.19.0)`	unaffected	semver	—
`[6.19.6,6.20.0)`	unaffected	semver	—
`[7.0,*)`	unaffected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4606-1	linux security update
Ubuntu USN	USN-8492-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8492-2	Linux kernel vulnerabilities
Ubuntu USN	USN-8497-1	Linux kernel (Low Latency) vulnerabilities
Ubuntu USN	USN-8498-1	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-8499-1	Linux kernel (Xilinx) vulnerabilities
Ubuntu USN	USN-8492-3	Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN	USN-8492-4	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-8492-5	Linux kernel (FIPS) vulnerabilities
Ubuntu USN	USN-8575-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8576-1	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-8575-2	Linux kernel vulnerabilities
Ubuntu USN	USN-8576-2	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-8597-1	Linux kernel (IBM) vulnerabilities
Ubuntu USN	USN-8575-3	Linux kernel vulnerabilities
Ubuntu USN	USN-8606-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8607-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8609-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8610-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8619-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-8620-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8620-2	Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN	USN-8620-3	Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN	USN-8620-4	Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN	USN-8668-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8668-2	Linux kernel (Raspberry Pi) vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.128% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/598c11dd4f4a9de31d854fcb9702f54c1c70f0d0
https://git.kernel.org/stable/c/5dbe1f14359735fa50ba0dd4a496125b5bc7f422
https://git.kernel.org/stable/c/a8d0ad5d990b050a6db74218a34b5529085e16b8
https://git.kernel.org/stable/c/ad0c356cae164ed5dbd1f4cfd438e46faa5292cb
https://git.kernel.org/stable/c/cccf96c49f61e47d9332d6a4d1c7fe9a2df44440
https://git.kernel.org/stable/c/e3baa5d4b361276efeb87b20d8beced451a7dbd5
https://git.kernel.org/stable/c/fd51d47fcacec3ca027eb65d8c44853d3b6cea95
https://git.kernel.org/stable/c/fd7e360845d331f542854d552469544182e61134
https://lore.kernel.org/linux-cve-announce/2026050607-CVE-2026-43261-d70e@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-43261
https://www.cve.org/CVERecord?id=CVE-2026-43261

History

Nov 7, 2026 7:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

May 8, 2026 8:45 PM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		NVD-CWE-noinfo
Metrics	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

May 7, 2026 3:45 PM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses	CWE-200

May 7, 2026 12:15 PM Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-515
References		https://lore.kernel.org/linux-cve-announce/2026050607-CVE-2026-43261-d70e@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-43261 https://www.cve.org/CVERecord?id=CVE-2026-43261
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Moderate`

May 6, 2026 4:30 PM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-200

May 6, 2026 12:15 PM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values Added
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.
Title		arm64: Add support for TSV110 Spectre-BHB mitigation
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/598c11dd4f4a9de31d854fcb9702f54c1c70f0d0 https://git.kernel.org/stable/c/5dbe1f14359735fa50ba0dd4a496125b5bc7f422 https://git.kernel.org/stable/c/a8d0ad5d990b050a6db74218a34b5529085e16b8 https://git.kernel.org/stable/c/ad0c356cae164ed5dbd1f4cfd438e46faa5292cb https://git.kernel.org/stable/c/cccf96c49f61e47d9332d6a4d1c7fe9a2df44440 https://git.kernel.org/stable/c/e3baa5d4b361276efeb87b20d8beced451a7dbd5 https://git.kernel.org/stable/c/fd51d47fcacec3ca027eb65d8c44853d3b6cea95 https://git.kernel.org/stable/c/fd7e360845d331f542854d552469544182e61134