HOMEVULNERABILITIESCVE-2026-43117
CRITICAL

CVE-2026-43117

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

9.1
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:4.8th

Official Description

In the Linux kernel, the following vulnerability has been resolved:

btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()

If overlay is used on top of btrfs, dentry->d_sb translates to overlay's

super block and fsid assignment will lead to a crash.

Use file_inode(file)->i_sb to always get btrfs_sb.

NVD Source

Technical Analysis

CVE-2026-43117 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 2 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/2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a
PATCHhttps://git.kernel.org/stable/c/32372781d664a9b03c40343e96c29d0a6139f97d
PATCHhttps://git.kernel.org/stable/c/a85b46db143fda5869e7d8df8f258ccef5fa1719
PATCHhttps://git.kernel.org/stable/c/c09a7446aab5773f38d6abb25fce99b8e1dfbc97
PATCHhttps://git.kernel.org/stable/c/d110d7cdb045715c0b45b0dfd974525bb38f653d

All References (5)

→
https://git.kernel.org/stable/c/2e4adfaec97ee053ad1bdfb5036845e66f7e0d8aPatch
→
https://git.kernel.org/stable/c/32372781d664a9b03c40343e96c29d0a6139f97dPatch
→
https://git.kernel.org/stable/c/a85b46db143fda5869e7d8df8f258ccef5fa1719Patch
→
https://git.kernel.org/stable/c/c09a7446aab5773f38d6abb25fce99b8e1dfbc97Patch
→
https://git.kernel.org/stable/c/d110d7cdb045715c0b45b0dfd974525bb38f653dPatch

Quick Facts

CVE IDCVE-2026-43117
CVSS Score9.1 / 10
SeverityCRITICAL
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43117 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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