CVE-2026-43261

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.

CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.10.105 — 5.10.252
linux	linux_kernel	5.11 — 5.15.202
linux	linux_kernel	5.16 — 6.1.165
linux	linux_kernel	6.2 — 6.6.128
linux	linux_kernel	6.7 — 6.12.75
linux	linux_kernel	6.13 — 6.18.16
linux	linux_kernel	6.19 — 6.19.6

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2026-43261? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43261? +

CVE-2026-43261 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-43261? +

CVE-2026-43261 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-43261? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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