HOMEVULNERABILITIESCVE-2026-43209
MEDIUM

CVE-2026-43209

Published: May 6, 2026· Updated: May 11, 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:

minix: Add required sanity checking to minix_check_superblock()

The fs/minix implementation of the minix filesystem does not currently

support any other value for s_log_zone_size than 0. This is also the

only value supported in util-linux; see mkfs.minix.c line 511. In

addition, this patch adds some sanity checking for the other minix

superblock fields, and moves the minix_blocks_needed() checks for the

zmap and imap also to minix_check_super_block().

This also closes a related syzbot bug report.

NVD Source

Technical Analysis

CVE-2026-43209 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 · 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/1efc128ee4adbc23e082715425ff895449d233bc
PATCHhttps://git.kernel.org/stable/c/2bb588cede1c1969e49c0a2822c8cb8b346b7682
PATCHhttps://git.kernel.org/stable/c/31fefc18096cdc5549cfa54964d90e0b3229aedc
PATCHhttps://git.kernel.org/stable/c/66c7c239c65341f99ae388d4d53dc9df2bcb9925
PATCHhttps://git.kernel.org/stable/c/8c97a6ddc95690a938ded44b4e3202f03f15078c
PATCHhttps://git.kernel.org/stable/c/a051ecf5c5b0387840dc210413ed3bc7fbdaa69c
PATCHhttps://git.kernel.org/stable/c/d791c544efd6b9c944b43cf7f502e5bcb02fb941
PATCHhttps://git.kernel.org/stable/c/f57ccd4657c7f082dc47e5b9e18a883bb5f9118f

All References (8)

→
https://git.kernel.org/stable/c/1efc128ee4adbc23e082715425ff895449d233bcPatch
→
https://git.kernel.org/stable/c/2bb588cede1c1969e49c0a2822c8cb8b346b7682Patch
→
https://git.kernel.org/stable/c/31fefc18096cdc5549cfa54964d90e0b3229aedcPatch
→
https://git.kernel.org/stable/c/66c7c239c65341f99ae388d4d53dc9df2bcb9925Patch
→
https://git.kernel.org/stable/c/8c97a6ddc95690a938ded44b4e3202f03f15078cPatch
→
https://git.kernel.org/stable/c/a051ecf5c5b0387840dc210413ed3bc7fbdaa69cPatch
→
https://git.kernel.org/stable/c/d791c544efd6b9c944b43cf7f502e5bcb02fb941Patch
→
https://git.kernel.org/stable/c/f57ccd4657c7f082dc47e5b9e18a883bb5f9118fPatch

Quick Facts

CVE IDCVE-2026-43209
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43209 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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