HOMEVULNERABILITIESCVE-2026-43261
MEDIUM

CVE-2026-43261

Published: May 6, 2026· Updated: May 8, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:7.0th

Official 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.

NVD Source

Technical Analysis

CVE-2026-43261 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/598c11dd4f4a9de31d854fcb9702f54c1c70f0d0
PATCHhttps://git.kernel.org/stable/c/5dbe1f14359735fa50ba0dd4a496125b5bc7f422
PATCHhttps://git.kernel.org/stable/c/a8d0ad5d990b050a6db74218a34b5529085e16b8
PATCHhttps://git.kernel.org/stable/c/ad0c356cae164ed5dbd1f4cfd438e46faa5292cb
PATCHhttps://git.kernel.org/stable/c/cccf96c49f61e47d9332d6a4d1c7fe9a2df44440
PATCHhttps://git.kernel.org/stable/c/e3baa5d4b361276efeb87b20d8beced451a7dbd5
PATCHhttps://git.kernel.org/stable/c/fd51d47fcacec3ca027eb65d8c44853d3b6cea95
PATCHhttps://git.kernel.org/stable/c/fd7e360845d331f542854d552469544182e61134

All References (8)

→
https://git.kernel.org/stable/c/598c11dd4f4a9de31d854fcb9702f54c1c70f0d0Patch
→
https://git.kernel.org/stable/c/5dbe1f14359735fa50ba0dd4a496125b5bc7f422Patch
→
https://git.kernel.org/stable/c/a8d0ad5d990b050a6db74218a34b5529085e16b8Patch
→
https://git.kernel.org/stable/c/ad0c356cae164ed5dbd1f4cfd438e46faa5292cbPatch
→
https://git.kernel.org/stable/c/cccf96c49f61e47d9332d6a4d1c7fe9a2df44440Patch
→
https://git.kernel.org/stable/c/e3baa5d4b361276efeb87b20d8beced451a7dbd5Patch
→
https://git.kernel.org/stable/c/fd51d47fcacec3ca027eb65d8c44853d3b6cea95Patch
→
https://git.kernel.org/stable/c/fd7e360845d331f542854d552469544182e61134Patch

Quick Facts

CVE IDCVE-2026-43261
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43261 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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