UBUNTU-CVE-2015-7550
The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.
02 / AFFECTED SOFTWARE
Affected packages
85 explicit affected versions
34 explicit affected versions
20 explicit affected versions
6 explicit affected versions
44 explicit affected versions
38 explicit affected versions
43 explicit affected versions
10 explicit affected versions
26 explicit affected versions
51 explicit affected versions
78 explicit affected versions
6 explicit affected versions
12 explicit affected versions
1 explicit affected versions
1 explicit affected versions
23 explicit affected versions
7 explicit affected versions
7 explicit affected versions
8 explicit affected versions
7 explicit affected versions
1 explicit affected versions
1 explicit affected versions
24 explicit affected versions
61 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/b4a1b4f5047e4f54e194681125c74c0aa64d637d
- https://ubuntu.com/security/CVE-2015-7550
- https://ubuntu.com/security/notices/USN-2888-1
- https://ubuntu.com/security/notices/USN-2890-1
- https://ubuntu.com/security/notices/USN-2890-2
- https://ubuntu.com/security/notices/USN-2890-3
- https://ubuntu.com/security/notices/USN-2907-1
- https://ubuntu.com/security/notices/USN-2907-2
- https://ubuntu.com/security/notices/USN-2910-1
- https://ubuntu.com/security/notices/USN-2911-1
- https://ubuntu.com/security/notices/USN-2911-2
- https://www.cve.org/CVERecord?id=CVE-2015-7550