SB2016062910 - Fedora 23 update for kernel
Published: June 29, 2016 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 vulnerabilities.
1) Resource exhaustion (CVE-ID: CVE-2016-1583)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local attacker to cause DoS condition and gain elevated privileges on the target system.
The weakness exists in the ecryptfs_privileged_open function in fs/ecryptfs/kthread.c due to stack memory consumption. A local attacker can cause the service to crash and gain elevated privileges via vectors involving crafted mmap calls for /proc pathnames, leading to recursive pagefault handling.
2) Data handling (CVE-ID: CVE-2016-4470)
CWE-ID: CWE-19 - Data Handling
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the key_reject_and_link function in security/keys/key.c due to it does not ensure that a certain data structure is initialized. A local attacker can cause the service to crash via vectors involving a crafted keyctl request2 command.
3) Memory corruption (CVE-ID: CVE-2016-4998)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a local user to cause denial of service conditions on the target system.
The vulnerability exists due to memory access error. A local user can cause the target sysetm to crash by issuing a specially crafted IPT_SO_SET_REPLACE setsockopt() call.
Successful exploitation of this vulnerability may result in the crash of the target sysetm.
4) Heap-based buffer overflow (CVE-ID: CVE-2016-5829)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause DoS condition or gain elevated privileges on the target system.
The weakness exists in the hiddev_ioctl_usage function in drivers/hid/usbhid/hiddev.c due to heap-based buffer overflow. A local attacker can cause the service to crash or gain elevated privileges via a crafted (1) HIDIOCGUSAGES or (2) HIDIOCSUSAGES ioctl call.
5) Buffer overflow (CVE-ID: CVE-2016-5728)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local authenticated user to #BASIC_IMPACT#.
Race condition in the vop_ioctl function in drivers/misc/mic/vop/vop_vringh.c in the MIC VOP driver in the Linux kernel before 4.6.1 allows local users to obtain sensitive information from kernel memory or cause a denial of service (memory corruption and system crash) by changing a certain header, aka a "double fetch" vulnerability.
6) Improper access control (CVE-ID: CVE-2016-1237)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to improper access control error within the nfsd4_set_nfs4_acl() function in fs/nfsd/nfs4acl.c, within the nfsd3_proc_setacl() function in fs/nfsd/nfs3acl.c, within the nfsacld_proc_setacl() and posix_acl_release() functions in fs/nfsd/nfs2acl.c. A local user can gain access to sensitive information.
Remediation
Install update from vendor's website.