block: add pgmap check to biovec_phys_mergeable
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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Configuration 1 [-]
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No data.
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| Linux | Linux Kernel |
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| Linux | Linux Kernel |
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| Source | ID | Title |
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Ubuntu USN |
USN-8488-1 | Linux kernel vulnerabilities |
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USN-8489-1 | Linux kernel (OEM) vulnerabilities |
Ubuntu USN |
USN-8490-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-8491-1 | Linux kernel (OEM) vulnerabilities |
Ubuntu USN |
USN-8492-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-8488-2 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-8492-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-8497-1 | Linux kernel (Low Latency) vulnerabilities |
Ubuntu USN |
USN-8498-1 | Linux kernel (NVIDIA Tegra) vulnerabilities |
Ubuntu USN |
USN-8499-1 | Linux kernel (Xilinx) vulnerabilities |
Ubuntu USN |
USN-8507-1 | Linux kernel (NVIDIA) vulnerabilities |
Ubuntu USN |
USN-8508-1 | Linux kernel (NVIDIA) vulnerabilities |
Ubuntu USN |
USN-8492-3 | Linux kernel (Raspberry Pi Real-time) vulnerabilities |
Ubuntu USN |
USN-8490-2 | Linux kernel (Real-time) vulnerabilities |
Ubuntu USN |
USN-8492-4 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-8492-5 | Linux kernel (FIPS) vulnerabilities |
Ubuntu USN |
USN-8545-1 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-8546-1 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-8569-1 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-8603-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-8604-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-8605-1 | Linux kernel (Azure CVM) vulnerabilities |
Ubuntu USN |
USN-8606-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-8607-1 | Linux kernel (Azure CVM) vulnerabilities |
Ubuntu USN |
USN-8609-1 | Linux kernel (Azure CVM) vulnerabilities |
Ubuntu USN |
USN-8619-1 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-8728-1 | Linux kernel (GCP) vulnerabilities |
Ubuntu USN |
USN-8728-2 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-8728-3 | Linux kernel (Oracle) vulnerabilities |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.491% probability within 30 days)
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-20 |
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| Metrics |
ssvc
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| Metrics |
cvssV3_1
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cvssV3_1
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| Type | Values Removed | Values Added |
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| Weaknesses | CWE-285 CWE-456 |
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-372 | |
| References |
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| Metrics |
threat_severity
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cvssV3_1
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| Type | Values Removed | Values Added |
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| Weaknesses | CWE-285 CWE-456 |
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| Description | In the Linux kernel, the following vulnerability has been resolved: block: add pgmap check to biovec_phys_mergeable biovec_phys_mergeable() is used by the request merge, DMA mapping, and integrity merge paths to decide if two physically contiguous bvec segments can be coalesced into one. It currently has no check for whether the segments belong to different dev_pagemaps. When zone device memory is registered in multiple chunks, each chunk gets its own dev_pagemap. A single bio can legitimately contain bvecs from different pgmaps -- iov_iter_extract_bvecs() breaks at pgmap boundaries but the outer loop in bio_iov_iter_get_pages() continues filling the same bio. If such bvecs are physically contiguous, biovec_phys_mergeable() will coalesce them, making it impossible to recover the correct pgmap for the merged segment via page_pgmap(). Add a zone_device_pages_have_same_pgmap() check to prevent merging bvec segments that span different pgmaps. | |
| Title | block: add pgmap check to biovec_phys_mergeable | |
| First Time appeared |
Linux
Linux linux Kernel |
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| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
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| References |
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