UBUNTU-CVE-2024-42235
In the Linux kernel, the following vulnerability has been resolved: s390/mm: Add NULL pointer check to crst_table_free() base_crst_free() crst_table_free() used to work with NULL pointers before the conversion to ptdescs. Since crst_table_free() can be called with a NULL pointer (error handling in crst_table_upgrade() add an explicit check. Also add the same check to base_crst_free() for consistency reasons. In real life this should not happen, since order two GFP_KERNEL allocations will not fail, unless FAIL_PAGE_ALLOC is enabled and used.
02 / AFFECTED SOFTWARE
Affected packages
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5 explicit affected versions
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11 explicit affected versions
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13 explicit affected versions
7 explicit affected versions
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44 explicit affected versions
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3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
37 explicit affected versions
15 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
11 explicit affected versions
6 explicit affected versions
7 explicit affected versions
4 explicit affected versions
13 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
10 explicit affected versions
14 explicit affected versions
4 explicit affected versions
1 explicit affected versions
8 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: s390/mm: Add NULL pointer check to crst_table_free() base_crst_free() crst_table_free() used to work with NULL pointers before the conversion to ptdescs. Since crst_table_free() can be called with a NULL pointer (error handling in crst_table_upgrade() add an explicit check. Also add the same check to base_crst_free() for consistency reasons. In real life this should not happen, since order two GFP_KERNEL allocations will not fail, unless FAIL_PAGE_ALLOC is enabled and used.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/b5efb63acf7bddaf20eacfcac654c25c446eabe8
- https://git.kernel.org/stable/c/794fa52b94637d6b2e8c9474fbe3983af5c9f046
- https://git.kernel.org/stable/c/b5efb63acf7bddaf20eacfcac654c25c446eabe8
- https://git.kernel.org/stable/c/f80bd8bb6f380bc265834c46058d38b34174813e
- https://ubuntu.com/security/CVE-2024-42235
- https://ubuntu.com/security/notices/USN-7089-1
- https://ubuntu.com/security/notices/USN-7089-2
- https://ubuntu.com/security/notices/USN-7089-3
- https://ubuntu.com/security/notices/USN-7089-4
- https://ubuntu.com/security/notices/USN-7089-5
- https://ubuntu.com/security/notices/USN-7089-6
- https://ubuntu.com/security/notices/USN-7089-7
- https://ubuntu.com/security/notices/USN-7090-1
- https://ubuntu.com/security/notices/USN-7095-1
- https://ubuntu.com/security/notices/USN-7156-1
- https://www.cve.org/CVERecord?id=CVE-2024-42235