dm-log: fix a bitset_size overflow on 32bit machines
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| Linux | Linux | affected |
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USN-8876-1 | Linux kernel (Azure CVM) vulnerabilities |
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USN-8875-1 | Linux kernel vulnerabilities |
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USN-8877-1 | Linux kernel (GCP) vulnerabilities |
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USN-8878-1 | Linux kernel (GCP) vulnerabilities |
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USN-8879-1 | Linux kernel (Oracle) vulnerabilities |
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USN-8887-1 | Linux kernel vulnerabilities |
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USN-8888-1 | Linux kernel (Azure) vulnerabilities |
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USN-8889-1 | Linux kernel (OEM) vulnerabilities |
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USN-8887-2 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-8888-2 | Linux kernel (Azure) vulnerabilities |
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USN-8875-2 | Linux kernel (NVIDIA) vulnerabilities |
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USN-8887-3 | Linux kernel vulnerabilities |
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USN-8917-1 | Linux kernel vulnerabilities |
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USN-8918-1 | Linux kernel (Azure) vulnerabilities |
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USN-9003-1 | Linux kernel (NVIDIA) vulnerabilities |
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USN-9024-1 | Linux kernel vulnerabilities |
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USN-9025-1 | Linux kernel vulnerabilities |
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USN-9026-1 | Linux kernel (Azure) vulnerabilities |
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USN-9029-1 | Linux kernel (Raspberry Pi) vulnerabilities |
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USN-9040-1 | Linux kernel (Low Latency NVIDIA) vulnerabilities |
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USN-9043-1 | Linux kernel (NVIDIA) vulnerabilities |
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USN-9066-1 | Linux kernel (HWE) vulnerabilities |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.169% probability within 30 days)
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ssvc
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| Weaknesses | CWE-787 |
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| Weaknesses | CWE-190 | |
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threat_severity
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threat_severity
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| Type | Values Removed | Values Added |
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| Weaknesses | CWE-787 |
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| Weaknesses | CWE-119 CWE-190 |
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cvssV3_1
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| Weaknesses | CWE-119 CWE-190 |
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| Description | In the Linux kernel, the following vulnerability has been resolved: dm-log: fix a bitset_size overflow on 32bit machines Commit c20e36b7631d ("dm log: fix out-of-bounds write due to region_count overflow") made sure that region_count could fit in an unsigned int. But the bitmap memory isn't allocated based on region_count. It uses bitset_size (a size_t variable). The first step of calculating bitset_size is to set it to region_count, rounded up to a multiple of BITS_PER_LONG. If region_size is less than BITS_PER_LONG smaller than UINT_MAX, it will get rounded up to 2^32. On a 32bit architecture, this will make bitset_size wrap around to 0 and fail, despite region_count being valid. Since bitset_size gets divided by 8, it can hold any valid region_count. It just needs a special case to handle the rollover. If it is 0, the value rolled over, and bitset size should be set to the number of bytes needed to hold 2^32 bits. | |
| Title | dm-log: fix a bitset_size overflow on 32bit machines | |
| 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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