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Bug#883729: glibc: CVE-2017-17426: malloc returns pointer from tcache_get when should return NULL

Source: glibc
Version: 2.26-0experimental1
Severity: important
Tags: patch security upstream fixed-upstream
Forwarded: https://sourceware.org/bugzilla/show_bug.cgi?id=22375


the following vulnerability was published for glibc (only affecting

| The malloc function in the GNU C Library (aka glibc or libc6) 2.26
| could return a memory block that is too small if an attempt is made to
| allocate an object whose size is close to SIZE_MAX, potentially leading
| to a subsequent heap overflow. This occurs because the per-thread cache
| (aka tcache) feature enables a code path that lacks an integer overflow
| check.

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2017-17426
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=22375


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