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CVE-2024-46852— dma-buf: heaps: Fix off-by-one in CMA heap fault handler

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，该漏洞源于存在边界检查错误。

CVSS 7.8 · High EPSS 0.21% · P11

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux a5d2d29e24be8967ef78a1b1fb2292413e3b3df9< 79cce5e81d20fa9ad553be439d665ac3302d3c95 affected
a5d2d29e24be8967ef78a1b1fb2292413e3b3df9< 84175dc5b2c932266a50c04e5ce342c30f817a2f affected
a5d2d29e24be8967ef78a1b1fb2292413e3b3df9< eb7fc8b65cea22f9038c52398c8b22849e9620ea affected
a5d2d29e24be8967ef78a1b1fb2292413e3b3df9< e79050882b857c37634baedbdcf7c2047c24cbff affected
a5d2d29e24be8967ef78a1b1fb2292413e3b3df9< ea5ff5d351b520524019f7ff7f9ce418de2dad87 affected
5.11 affected
< 5.11 unaffected
5.15.168≤ 5.15.* unaffected
… +4 more rows
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I. Basic Information for CVE-2024-46852

Vulnerability Information
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Vulnerability Title
dma-buf: heaps: Fix off-by-one in CMA heap fault handler
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dma-buf: heaps: Fix off-by-one in CMA heap fault handler Until VM_DONTEXPAND was added in commit 1c1914d6e8c6 ("dma-buf: heaps: Don't track CMA dma-buf pages under RssFile") it was possible to obtain a mapping larger than the buffer size via mremap and bypass the overflow check in dma_buf_mmap_internal. When using such a mapping to attempt to fault past the end of the buffer, the CMA heap fault handler also checks the fault offset against the buffer size, but gets the boundary wrong by 1. Fix the boundary check so that we don't read off the end of the pages array and insert an arbitrary page in the mapping.
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，该漏洞源于存在边界检查错误。
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 a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 ~ 79cce5e81d20fa9ad553be439d665ac3302d3c95 -
Linux Linux 5.11 -

II. Public POCs for CVE-2024-46852

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III. Intelligence Information for CVE-2024-46852

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Other References for CVE-2024-46852 (6)

Same Patch Batch · Linux · 2024-09-27 · 66 CVEs total

CVE-2024-46865 9.8 CRITICAL fou: fix initialization of grc
CVE-2024-46823 8.4 HIGH kunit/overflow: Fix UB in overflow_allocation_test
CVE-2024-46831 8.4 HIGH net: microchip: vcap: Fix use-after-free error in kunit test
CVE-2024-46858 8.1 HIGH mptcp: pm: Fix uaf in __timer_delete_sync
CVE-2024-46862 8.0 HIGH ASoC: Intel: soc-acpi-intel-mtl-match: add missing empty item
CVE-2024-46866 7.8 HIGH drm/xe/client: add missing bo locking in show_meminfo()
CVE-2024-46812 7.8 HIGH drm/amd/display: Skip inactive planes within ModeSupportAndSystemConfiguration
CVE-2024-46813 7.8 HIGH drm/amd/display: Check link_index before accessing dc->links[]
CVE-2024-46816 7.8 HIGH drm/amd/display: Stop amdgpu_dm initialize when link nums greater than max_links
CVE-2024-46818 7.8 HIGH drm/amd/display: Check gpio_id before used as array index
CVE-2024-46830 7.8 HIGH KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS
CVE-2024-46834 7.8 HIGH ethtool: fail closed if we can't get max channel used in indirection tables
CVE-2024-46842 7.8 HIGH scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info
CVE-2024-46845 7.8 HIGH tracing/timerlat: Only clear timer if a kthread exists
CVE-2024-46847 7.8 HIGH mm: vmalloc: ensure vmap_block is initialised before adding to queue
CVE-2024-46850 7.8 HIGH drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()
CVE-2024-46859 7.8 HIGH platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses
CVE-2024-46803 7.8 HIGH drm/amdkfd: Check debug trap enable before write dbg_ev_file
CVE-2024-46855 7.5 HIGH netfilter: nft_socket: fix sk refcount leaks
CVE-2024-46817 7.4 HIGH drm/amd/display: Stop amdgpu_dm initialize when stream nums greater than 6

Showing top 20 of 66 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46852

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