CVE-2026-72369
- Source
- https://cve.org/CVERecord?id=CVE-2026-72369
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72369.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-72369
- Downstream
- Published
- 2026-08-15T05:56:05Z
- Modified
- 2026-10-08T02:51:47Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- minix: avoid overflow in bitmap block count calculation
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72369.json" }- References
-
- 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
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72369.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-72369
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced2bb588cede1c1969e49c0a2822c8cb8b346b7682Fixeda11ebaab50d27d6c4c78506f84ff36452e0b901d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf57ccd4657c7f082dc47e5b9e18a883bb5f9118fFixed959c95340a9e19cd333b4c18935fdeecbb2f319d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced31fefc18096cdc5549cfa54964d90e0b3229aedcFixedabe3536a4bedcc43de80b6d4d7e3d57e9ba382a5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8c97a6ddc95690a938ded44b4e3202f03f15078cFixed8a29e60e2176b02e04f8737c8b32b696230eb0c5Fixedfb3e566cafc38fe3ba35e6843a2d529a3748870c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.6.128Fixed6.6.145
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.75Fixed6.12.97
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.18.16Fixed6.18.40
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.10.252Fixed5.11
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.15.202Fixed5.16
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.1.165Fixed6.2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.19.6Fixed6.20
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda051ecf5c5b0387840dc210413ed3bc7fbdaa69c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd791c544efd6b9c944b43cf7f502e5bcb02fb941
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced66c7c239c65341f99ae388d4d53dc9df2bcb9925
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1efc128ee4adbc23e082715425ff895449d233bc
Affected versions
v5.*
v6.*
Linux / Kernel
Package
- Name
- Kernel