HOMEVULNERABILITIESCVE-2026-43291
HIGH

CVE-2026-43291

Published: May 8, 2026· Updated: May 14, 2026

8.3
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:

net: nfc: nci: Fix parameter validation for packet data

Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for

packet data") communication with nci nfc chips is not working any more.

The mentioned commit tries to fix access of uninitialized data, but

failed to understand that in some cases the data packet is of variable

length and can therefore not be compared to the maximum packet length

given by the sizeof(struct).

NVD Source

Technical Analysis

CVE-2026-43291 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 8.3.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/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/3b91160e9a91b5a2662875417dc42dc5b0bf03ea
PATCHhttps://git.kernel.org/stable/c/498fc5d0d650c77e87fcc73808d4f43240c21805
PATCHhttps://git.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2
PATCHhttps://git.kernel.org/stable/c/a24a8a582da4426b2042e510a1080df84083b51d
PATCHhttps://git.kernel.org/stable/c/ad058a4317db7fdb3f09caa6ed536d24a62ce6a0
PATCHhttps://git.kernel.org/stable/c/c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b
PATCHhttps://git.kernel.org/stable/c/f5218426f765eee22e178df9c126d974792fb6a5

All References (7)

→
https://git.kernel.org/stable/c/3b91160e9a91b5a2662875417dc42dc5b0bf03eaPatch
→
https://git.kernel.org/stable/c/498fc5d0d650c77e87fcc73808d4f43240c21805Patch
→
https://git.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2Patch
→
https://git.kernel.org/stable/c/a24a8a582da4426b2042e510a1080df84083b51dPatch
→
https://git.kernel.org/stable/c/ad058a4317db7fdb3f09caa6ed536d24a62ce6a0Patch
→
https://git.kernel.org/stable/c/c692db813a7e3b7c3c17d6e9a3ad2a018bf1142bPatch
→
https://git.kernel.org/stable/c/f5218426f765eee22e178df9c126d974792fb6a5Patch

Quick Facts

CVE IDCVE-2026-43291
CVSS Score8.3 / 10
SeverityHIGH
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 8, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43291 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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