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CVE-2026-72369— minix: avoid overflow in bitmap block count calculation

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.10.252至5.11之前版本、5.15.202至5.16之前版本、6.1.165至6.2之前版本、6.6.128至6.6.145之前版本、6.12.75至6.12.97之前版本、6.18.16至6.18.40之前版本和6.19.6至6.20之前版本存在安全漏洞，该漏洞源于minix文件系统在计算位图块数量时存在整数溢出，可能导致挂载特制的Minix v3镜像时解引用未分配的位图缓冲区，导致内核崩溃。

CVSS 7.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 23

VendorProduct Version RangeStatus
Linux Linux 2bb588cede1c1969e49c0a2822c8cb8b346b7682< a11ebaab50d27d6c4c78506f84ff36452e0b901d affected
f57ccd4657c7f082dc47e5b9e18a883bb5f9118f< 959c95340a9e19cd333b4c18935fdeecbb2f319d affected
31fefc18096cdc5549cfa54964d90e0b3229aedc< abe3536a4bedcc43de80b6d4d7e3d57e9ba382a5 affected
8c97a6ddc95690a938ded44b4e3202f03f15078c< 8a29e60e2176b02e04f8737c8b32b696230eb0c5 affected
8c97a6ddc95690a938ded44b4e3202f03f15078c< fb3e566cafc38fe3ba35e6843a2d529a3748870c affected
a051ecf5c5b0387840dc210413ed3bc7fbdaa69c affected
d791c544efd6b9c944b43cf7f502e5bcb02fb941 affected
66c7c239c65341f99ae388d4d53dc9df2bcb9925 affected
… +15 more rows
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I. Basic Information for CVE-2026-72369

Vulnerability Information
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Vulnerability Title
minix: avoid overflow in bitmap block count calculation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.10.252至5.11之前版本、5.15.202至5.16之前版本、6.1.165至6.2之前版本、6.6.128至6.6.145之前版本、6.12.75至6.12.97之前版本、6.18.16至6.18.40之前版本和6.19.6至6.20之前版本存在安全漏洞，该漏洞源于minix文件系统在计算位图块数量时存在整数溢出，可能导致挂载特制的Minix v3镜像时解引用未分配的位图缓冲区，导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 2bb588cede1c1969e49c0a2822c8cb8b346b7682 ~ a11ebaab50d27d6c4c78506f84ff36452e0b901d -
Linux Linux 7.0 -

II. Public POCs for CVE-2026-72369

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III. Intelligence Information for CVE-2026-72369

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Patches & Fixes for CVE-2026-72369 (5)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72472 9.8 CRITICAL nfs: use nfsi->rwsem to protect traversal of the file lock list
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-72473 9.8 CRITICAL xprtrdma: Decouple req recycling from RPC completion
CVE-2026-72098 9.8 CRITICAL dm-verity: fix buffer overflow in FEC calculation
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-74434 9.8 CRITICAL rxrpc: Don't move a peeked OOB message onto the pending queue
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-72477 9.8 CRITICAL fs/ntfs3: call _ntfs_bad_inode() when failing to rename
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72130 9.8 CRITICAL nvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-72137 9.8 CRITICAL xfrm: nat_keepalive: avoid double free on send error

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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