CVE-2018-12896 (GCVE-0-2018-12896)

Vulnerability from cvelistv5 – Published: 2018-07-02 17:00 – Updated: 2024-08-05 08:45
VLAI?
Summary
An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
References
https://bugzilla.kernel.org/show_bug.cgi?id=200189 x_refsource_MISC
https://usn.ubuntu.com/3848-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3847-1/ vendor-advisoryx_refsource_UBUNTU
https://github.com/torvalds/linux/commit/78c9c4df… x_refsource_MISC
https://usn.ubuntu.com/3847-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3849-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3849-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3848-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3847-3/ vendor-advisoryx_refsource_UBUNTU
https://github.com/lcytxw/bug_repro/tree/master/b… x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
Show details on NVD website
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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