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CVE-2024-42131— mm: avoid overflows in dirty throttling logic

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基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于mm模块中在脏页抑制逻辑中，假设脏页限制在PAGE_SIZE单位下适合32位，如果限制更大，可能会遇到溢出和除以零等问题。

AI Predicted 4.4 Difficulty: Trivial EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 2da02997e08d3efe8174c7a47696e6f7cbe69ba9< 2b2d2b8766db028bd827af34075f221ae9e9efff affected
2da02997e08d3efe8174c7a47696e6f7cbe69ba9< 4d3817b64eda07491bdd86a234629fe0764fb42a affected
2da02997e08d3efe8174c7a47696e6f7cbe69ba9< 7a49389771ae7666f4dc3426e2a4594bf23ae290 affected
2da02997e08d3efe8174c7a47696e6f7cbe69ba9< a25e8536184516b55ef89ab91dd2eea429de28d2 affected
2da02997e08d3efe8174c7a47696e6f7cbe69ba9< c83ed422c24f0d4b264f89291d4fabe285f80dbc affected
2da02997e08d3efe8174c7a47696e6f7cbe69ba9< bd16a7ee339aef3ee4c90cb23902afb6af379ea0 affected
2da02997e08d3efe8174c7a47696e6f7cbe69ba9< 8e0b5e7f2895eccef5c2a0018b589266f90c4805 affected
2da02997e08d3efe8174c7a47696e6f7cbe69ba9< 385d838df280eba6c8680f9777bfa0d0bfe7e8b2 affected
… +10 more rows
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I. Basic Information for CVE-2024-42131

Vulnerability Information
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Vulnerability Title
mm: avoid overflows in dirty throttling logic
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm: avoid overflows in dirty throttling logic The dirty throttling logic is interspersed with assumptions that dirty limits in PAGE_SIZE units fit into 32-bit (so that various multiplications fit into 64-bits). If limits end up being larger, we will hit overflows, possible divisions by 0 etc. Fix these problems by never allowing so large dirty limits as they have dubious practical value anyway. For dirty_bytes / dirty_background_bytes interfaces we can just refuse to set so large limits. For dirty_ratio / dirty_background_ratio it isn't so simple as the dirty limit is computed from the amount of available memory which can change due to memory hotplug etc. So when converting dirty limits from ratios to numbers of pages, we just don't allow the result to exceed UINT_MAX. This is root-only triggerable problem which occurs when the operator sets dirty limits to >16 TB.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于mm模块中在脏页抑制逻辑中，假设脏页限制在PAGE_SIZE单位下适合32位，如果限制更大，可能会遇到溢出和除以零等问题。
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 2da02997e08d3efe8174c7a47696e6f7cbe69ba9 ~ 2b2d2b8766db028bd827af34075f221ae9e9efff -
Linux Linux 2.6.29 -

II. Public POCs for CVE-2024-42131

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III. Intelligence Information for CVE-2024-42131

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Other References for CVE-2024-42131 (8)

Same Patch Batch · Linux · 2024-07-30 · 70 CVEs total

CVE-2024-42108 9.8 CRITICAL net: rswitch: Avoid use-after-free in rswitch_poll()
CVE-2024-42225 8.3 HIGH wifi: mt76: replace skb_put with skb_put_zero
CVE-2024-42120 7.8 HIGH drm/amd/display: Check pipe offset before setting vblank
CVE-2024-42115 7.8 HIGH jffs2: Fix potential illegal address access in jffs2_free_inode
CVE-2024-42112 7.8 HIGH net: txgbe: free isb resources at the right time
CVE-2024-42111 7.8 HIGH btrfs: always do the basic checks for btrfs_qgroup_inherit structure
CVE-2024-42117 7.8 HIGH drm/amd/display: ASSERT when failing to find index by plane/stream id
CVE-2024-42109 7.8 HIGH netfilter: nf_tables: unconditionally flush pending work before notifier
CVE-2024-42162 7.8 HIGH gve: Account for stopped queues when reading NIC stats
CVE-2024-42105 7.8 HIGH nilfs2: fix inode number range checks
CVE-2024-42104 7.8 HIGH nilfs2: add missing check for inode numbers on directory entries
CVE-2024-42103 7.8 HIGH btrfs: fix adding block group to a reclaim list and the unused list during reclaim
CVE-2024-42099 7.8 HIGH s390/dasd: Fix invalid dereferencing of indirect CCW data pointer
CVE-2024-42132 7.6 HIGH bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX
CVE-2024-42133 7.6 HIGH Bluetooth: Ignore too large handle values in BIG
CVE-2024-42152 7.5 HIGH nvmet: fix a possible leak when destroy a ctrl during qp establishment
CVE-2024-42110 7.5 HIGH net: ntb_netdev: Move ntb_netdev_rx_handler() to call netif_rx() from __netif_rx()
CVE-2024-42145 7.5 HIGH IB/core: Implement a limit on UMAD receive List
CVE-2024-42123 7.0 HIGH drm/amdgpu: fix double free err_addr pointer warnings
CVE-2024-42224 7.0 HIGH net: dsa: mv88e6xxx: Correct check for empty list

Showing top 20 of 70 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-42131

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