CVE-2015-8983

Severity: high (CVSS 8.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-03-20 · updated 2026-06-17
Weakness: CWE-190

Description

Integer overflow in the _IO_wstr_overflow function in libio/wstrops.c in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via vectors related to computing a size in bytes, which triggers a heap-based buffer overflow.

Affected products

GNU C Library (glibc): through 2.21

References

http://www.openwall.com/lists/oss-security/2017/02/14/9
http://www.securityfocus.com/bid/72740
https://sourceware.org/bugzilla/show_bug.cgi?id=17269
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=bdf1ff052a8e23d637f2c838fa5642d78fcedc33
https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html
http://www.openwall.com/lists/oss-security/2017/02/14/9
http://www.securityfocus.com/bid/72740
https://sourceware.org/bugzilla/show_bug.cgi?id=17269
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=bdf1ff052a8e23d637f2c838fa5642d78fcedc33
https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html

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