SB2016041404 - Fedora 22 update for kernel
Published: April 14, 2016 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Resource exhaustion (CVE-ID: CVE-2016-3672)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The weakness exists in the arch_pick_mmap_layout function in arch/x86/mm/mmap.c due to improper randomizing of the legacy base address. A local attacker can disable stack-consumption resource limits, defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag and bypass the ASLR protection mechanism for a setuid or setgid program.
2) Race condition (CVE-ID: CVE-2015-8839)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition within the init_once() function in fs/ext4/super.c, within the ext4_punch_hole(), ext4_setattr(), ext4_page_mkwrite() and block_page_mkwrite_return() functions in fs/ext4/inode.c, within the ext4_dax_fault() and ext4_dax_pmd_fault() functions in fs/ext4/file.c, within the ext4_zero_range(), ext4_collapse_range() and ext4_insert_range() functions in fs/ext4/extents.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.
3) Double free (CVE-ID: CVE-2016-3951)
CWE-ID: CWE-415 - Double Free
CVSSv4: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a double free error within the drivers/net/usb/usbnet.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.