1. Home
  2. Vulnerabilities
  3. CVE-2026-72369
7.8
HIGH CVSS 3.1
CVE-2026-72369
minix: avoid overflow in bitmap block count calculation
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: minix: avoid overflow in bitmap block count calculation minix_check_superblock() uses minix_blocks_needed() to verify that the on-disk imap and zmap block counts are large enough for the advertised inode and zone counts. The helper currently performs DIV_ROUND_UP() in unsigned int arithmetic. A Minix v3 image can set s_ninodes or s_zones near UINT_MAX so the addition inside DIV_ROUND_UP() wraps to zero. That makes a zero imap/zmap block count look valid, after which minix_fill_super() can dereference s_imap[0] or s_zmap[0] even though no bitmap buffers were allocated. Impact: mounting a crafted Minix v3 image whose s_ninodes or s_zones is near UINT_MAX makes minix_check_superblock() accept a zero bitmap-block count and minix_fill_super() dereference s_imap[0]/s_zmap[0], panicking the kernel. The divisor is the bitmap capacity in bits, blocksize * 8, which is always a power of two: minix_fill_super() obtains the block size through sb_set_blocksize(), and blk_validate_block_size() rejects any size that is not a power of two. Use DIV_ROUND_UP_POW2(), which divides before adding the round-up term and so cannot overflow for a power-of-two divisor.

Details
INFO

Published Date :

Aug. 15, 2026, 6:22 a.m.

Last Modified :

Aug. 17, 2026, 6:18 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-72369 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Resolve integer overflow in bitmap calculation to prevent kernel panic.
  • Apply kernel patch using DIV_ROUND_UP_POW2.
  • Update the Linux kernel to the patched version.
  • Validate bitmap block count calculations.
  • Test with crafted Minix v3 images.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-72369.

URL Resource
https://git.kernel.org/stable/c/8a29e60e2176b02e04f8737c8b32b696230eb0c5
https://git.kernel.org/stable/c/959c95340a9e19cd333b4c18935fdeecbb2f319d
https://git.kernel.org/stable/c/a11ebaab50d27d6c4c78506f84ff36452e0b901d
https://git.kernel.org/stable/c/abe3536a4bedcc43de80b6d4d7e3d57e9ba382a5
https://git.kernel.org/stable/c/fb3e566cafc38fe3ba35e6843a2d529a3748870c
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-72369 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-72369 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-72369 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-72369 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2bb588cede1c1969e49c0a2822c8cb8b346b7682', 'lessThan': 'a11ebaab50d27d6c4c78506f84ff36452e0b901d', 'versionType': 'git'}, {'status': 'affected', 'version': 'f57ccd4657c7f082dc47e5b9e18a883bb5f9118f', 'lessThan': '959c95340a9e19cd333b4c18935fdeecbb2f319d', 'versionType': 'git'}, {'status': 'affected', 'version': '31fefc18096cdc5549cfa54964d90e0b3229aedc', 'lessThan': 'abe3536a4bedcc43de80b6d4d7e3d57e9ba382a5', 'versionType': 'git'}, {'status': 'affected', 'version': '8c97a6ddc95690a938ded44b4e3202f03f15078c', 'lessThan': '8a29e60e2176b02e04f8737c8b32b696230eb0c5', 'versionType': 'git'}, {'status': 'affected', 'version': '8c97a6ddc95690a938ded44b4e3202f03f15078c', 'lessThan': 'fb3e566cafc38fe3ba35e6843a2d529a3748870c', 'versionType': 'git'}, {'status': 'affected', 'version': 'a051ecf5c5b0387840dc210413ed3bc7fbdaa69c', 'versionType': 'git'}, {'status': 'affected', 'version': 'd791c544efd6b9c944b43cf7f502e5bcb02fb941', 'versionType': 'git'}, {'status': 'affected', 'version': '66c7c239c65341f99ae388d4d53dc9df2bcb9925', 'versionType': 'git'}, {'status': 'affected', 'version': '1efc128ee4adbc23e082715425ff895449d233bc', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.128', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.75', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.16', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.252', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.202', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.165', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.19.6', 'lessThan': '6.20', 'versionType': 'semver'}], 'programFiles': ['fs/minix/minix.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/minix/minix.h'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2bb588cede1c1969e49c0a2822c8cb8b346b7682', 'lessThan': 'a11ebaab50d27d6c4c78506f84ff36452e0b901d', 'versionType': 'git'}, {'status': 'affected', 'version': 'f57ccd4657c7f082dc47e5b9e18a883bb5f9118f', 'lessThan': '959c95340a9e19cd333b4c18935fdeecbb2f319d', 'versionType': 'git'}, {'status': 'affected', 'version': '31fefc18096cdc5549cfa54964d90e0b3229aedc', 'lessThan': 'abe3536a4bedcc43de80b6d4d7e3d57e9ba382a5', 'versionType': 'git'}, {'status': 'affected', 'version': '8c97a6ddc95690a938ded44b4e3202f03f15078c', 'lessThan': '8a29e60e2176b02e04f8737c8b32b696230eb0c5', 'versionType': 'git'}, {'status': 'affected', 'version': '8c97a6ddc95690a938ded44b4e3202f03f15078c', 'lessThan': 'fb3e566cafc38fe3ba35e6843a2d529a3748870c', 'versionType': 'git'}, {'status': 'affected', 'version': 'a051ecf5c5b0387840dc210413ed3bc7fbdaa69c', 'versionType': 'git'}, {'status': 'affected', 'version': 'd791c544efd6b9c944b43cf7f502e5bcb02fb941', 'versionType': 'git'}, {'status': 'affected', 'version': '66c7c239c65341f99ae388d4d53dc9df2bcb9925', 'versionType': 'git'}, {'status': 'affected', 'version': '1efc128ee4adbc23e082715425ff895449d233bc', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.128', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.75', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.16', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.252', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.202', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.165', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.19.6', 'lessThan': '6.20', 'versionType': 'semver'}], 'programFiles': ['fs/minix/minix.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/minix/minix.h'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2bb588cede1c1969e49c0a2822c8cb8b346b7682', 'lessThan': 'a11ebaab50d27d6c4c78506f84ff36452e0b901d', 'versionType': 'git'}, {'status': 'affected', 'version': 'f57ccd4657c7f082dc47e5b9e18a883bb5f9118f', 'lessThan': '959c95340a9e19cd333b4c18935fdeecbb2f319d', 'versionType': 'git'}, {'status': 'affected', 'version': '31fefc18096cdc5549cfa54964d90e0b3229aedc', 'lessThan': 'abe3536a4bedcc43de80b6d4d7e3d57e9ba382a5', 'versionType': 'git'}, {'status': 'affected', 'version': '8c97a6ddc95690a938ded44b4e3202f03f15078c', 'lessThan': '8a29e60e2176b02e04f8737c8b32b696230eb0c5', 'versionType': 'git'}, {'status': 'affected', 'version': '8c97a6ddc95690a938ded44b4e3202f03f15078c', 'lessThan': 'fb3e566cafc38fe3ba35e6843a2d529a3748870c', 'versionType': 'git'}, {'status': 'affected', 'version': 'a051ecf5c5b0387840dc210413ed3bc7fbdaa69c', 'versionType': 'git'}, {'status': 'affected', 'version': 'd791c544efd6b9c944b43cf7f502e5bcb02fb941', 'versionType': 'git'}, {'status': 'affected', 'version': '66c7c239c65341f99ae388d4d53dc9df2bcb9925', 'versionType': 'git'}, {'status': 'affected', 'version': '1efc128ee4adbc23e082715425ff895449d233bc', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.128', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.75', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.16', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.252', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.202', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.165', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.19.6', 'lessThan': '6.20', 'versionType': 'semver'}], 'programFiles': ['fs/minix/minix.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/minix/minix.h'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: minix: avoid overflow in bitmap block count calculation minix_check_superblock() uses minix_blocks_needed() to verify that the on-disk imap and zmap block counts are large enough for the advertised inode and zone counts. The helper currently performs DIV_ROUND_UP() in unsigned int arithmetic. A Minix v3 image can set s_ninodes or s_zones near UINT_MAX so the addition inside DIV_ROUND_UP() wraps to zero. That makes a zero imap/zmap block count look valid, after which minix_fill_super() can dereference s_imap[0] or s_zmap[0] even though no bitmap buffers were allocated. Impact: mounting a crafted Minix v3 image whose s_ninodes or s_zones is near UINT_MAX makes minix_check_superblock() accept a zero bitmap-block count and minix_fill_super() dereference s_imap[0]/s_zmap[0], panicking the kernel. The divisor is the bitmap capacity in bits, blocksize * 8, which is always a power of two: minix_fill_super() obtains the block size through sb_set_blocksize(), and blk_validate_block_size() rejects any size that is not a power of two. Use DIV_ROUND_UP_POW2(), which divides before adding the round-up term and so cannot overflow for a power-of-two divisor.
    Added Reference https://git.kernel.org/stable/c/8a29e60e2176b02e04f8737c8b32b696230eb0c5
    Added Reference https://git.kernel.org/stable/c/959c95340a9e19cd333b4c18935fdeecbb2f319d
    Added Reference https://git.kernel.org/stable/c/a11ebaab50d27d6c4c78506f84ff36452e0b901d
    Added Reference https://git.kernel.org/stable/c/abe3536a4bedcc43de80b6d4d7e3d57e9ba382a5
    Added Reference https://git.kernel.org/stable/c/fb3e566cafc38fe3ba35e6843a2d529a3748870c
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact