Summary
The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.
Security Fix(es):
* glibc: Integer overflow in memalign leads to heap corruption (CVE-2026-0861)
* glibc: glibc: Information disclosure via zero-valued network query (CVE-2026-0915)
* glibc: wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory (CVE-2025-15281)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 9 | glibc | 0:2.34-231.el9_7.10 |
Vulnerabilities 3
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High 8.4
Integer overflow in memalign leads to heap corruption
Passing too large an alignment to the memalign suite of functions (memalign, posix_memalign, aligned_alloc) in the GNU C Library version 2.30 to 2.42 may result in an integer overflow, which could consequently result in a heap corruption. Note that the attack…
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High 7.5
wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory
Calling wordexp with WRDE_REUSE in conjunction with WRDE_APPEND in the GNU C Library version 2.0 to version 2.42 may cause the interface to return uninitialized memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.
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High 7.5CVE-2026-0915 Public exploit
getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler
Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS r…