UBUNTU-CVE-2020-29374
An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.
02 / AFFECTED SOFTWARE
Affected packages
89 explicit affected versions
50 explicit affected versions
6 explicit affected versions
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57 explicit affected versions
191 explicit affected versions
57 explicit affected versions
12 explicit affected versions
38 explicit affected versions
11 explicit affected versions
68 explicit affected versions
23 explicit affected versions
1 explicit affected versions
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5 explicit affected versions
1 explicit affected versions
12 explicit affected versions
16 explicit affected versions
57 explicit affected versions
12 explicit affected versions
13 explicit affected versions
10 explicit affected versions
36 explicit affected versions
56 explicit affected versions
35 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
13 explicit affected versions
9 explicit affected versions
52 explicit affected versions
1 explicit affected versions
14 explicit affected versions
32 explicit affected versions
23 explicit affected versions
10 explicit affected versions
11 explicit affected versions
91 explicit affected versions
12 explicit affected versions
2 explicit affected versions
55 explicit affected versions
4 explicit affected versions
60 explicit affected versions
1 explicit affected versions
122 explicit affected versions
51 explicit affected versions
14 explicit affected versions
68 explicit affected versions
1 explicit affected versions
17 explicit affected versions
2 explicit affected versions
1 explicit affected versions
2 explicit affected versions
1 explicit affected versions
14 explicit affected versions
78 explicit affected versions
2 explicit affected versions
37 explicit affected versions
44 explicit affected versions
16 explicit affected versions
26 explicit affected versions
9 explicit affected versions
38 explicit affected versions
9 explicit affected versions
100 explicit affected versions
2 explicit affected versions
84 explicit affected versions
35 explicit affected versions
45 explicit affected versions
6 explicit affected versions
2 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
6 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.
05 / REFERENCES
Further evidence
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2045
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3
- https://git.kernel.org/linus/17839856fd588f4ab6b789f482ed3ffd7c403e1f
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f
- https://ubuntu.com/security/CVE-2020-29374
- https://ubuntu.com/security/notices/USN-4748-1
- https://ubuntu.com/security/notices/USN-4749-1
- https://www.cve.org/CVERecord?id=CVE-2020-29374