UBUNTU-CVE-2024-57953
In the Linux kernel, the following vulnerability has been resolved: rtc: tps6594: Fix integer overflow on 32bit systems The problem is this multiply in tps6594_rtc_set_offset() tmp = offset * TICKS_PER_HOUR; The "tmp" variable is an s64 but "offset" is a long in the (-277774)-277774 range. On 32bit systems a long can hold numbers up to approximately two billion. The number of TICKS_PER_HOUR is really large, (32768 * 3600) or roughly a hundred million. When you start multiplying by a hundred million it doesn't take long to overflow the two billion mark. Probably the safest way to fix this is to change the type of TICKS_PER_HOUR to long long because it's such a large number.
02 / AFFECTED SOFTWARE
Affected packages
2 explicit affected versions
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7 explicit affected versions
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14 explicit affected versions
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3 explicit affected versions
16 explicit affected versions
43 explicit affected versions
11 explicit affected versions
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13 explicit affected versions
6 explicit affected versions
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1 explicit affected versions
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: rtc: tps6594: Fix integer overflow on 32bit systems The problem is this multiply in tps6594_rtc_set_offset() tmp = offset * TICKS_PER_HOUR; The "tmp" variable is an s64 but "offset" is a long in the (-277774)-277774 range. On 32bit systems a long can hold numbers up to approximately two billion. The number of TICKS_PER_HOUR is really large, (32768 * 3600) or roughly a hundred million. When you start multiplying by a hundred million it doesn't take long to overflow the two billion mark. Probably the safest way to fix this is to change the type of TICKS_PER_HOUR to long long because it's such a large number.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/09c4a610153286cef54d4f0c85398f4e32fc227e
- https://git.kernel.org/stable/c/09c4a610153286cef54d4f0c85398f4e32fc227e
- https://git.kernel.org/stable/c/5127f3cbfc78a7b301b86328247230bec47e0bb3
- https://git.kernel.org/stable/c/53b0c7b15accb18d15d95c7fe68f61630ebfd1ca
- https://ubuntu.com/security/CVE-2024-57953
- https://ubuntu.com/security/notices/USN-7521-1
- https://ubuntu.com/security/notices/USN-7521-2
- https://ubuntu.com/security/notices/USN-7521-3
- https://ubuntu.com/security/notices/USN-7651-1
- https://ubuntu.com/security/notices/USN-7651-2
- https://ubuntu.com/security/notices/USN-7651-3
- https://ubuntu.com/security/notices/USN-7651-4
- https://ubuntu.com/security/notices/USN-7651-5
- https://ubuntu.com/security/notices/USN-7651-6
- https://ubuntu.com/security/notices/USN-7652-1
- https://ubuntu.com/security/notices/USN-7653-1
- https://ubuntu.com/security/notices/USN-7737-1
- https://www.cve.org/CVERecord?id=CVE-2024-57953