| Package | glib2.0 |
|---|---|
| Version | 2.50.3-2+deb9u9 (stretch), 2.58.3-2+deb10u10 (buster) |
| Related CVEs | CVE-2026-0988 CVE-2026-1484 CVE-2026-1485 CVE-2026-1489 |
Multiple issues were found in GLib, a general-purpose, portable utility library, that could lead to denial of service, memory corruption or potentially arbitrary code execution if maliciously crafted data is processed.
- CVE-2026-0988
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Codean Labs found missing validation of offset and count parameters in the
g_buffered_input_stream_peek()function can lead to an integer overflow during length calculation. When specially crafted values are provided, this overflow results in an incorrect size being passed to memcpy(), triggering a buffer overflow. This can cause application crashes, leading to a Denial of Service (DoS). - CVE-2026-1484
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treeplus, with additional thanks to Sovereign Tech Resilience program of the Sovereign Tech Agency, found a flaw in the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.
- CVE-2026-1485
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treeplus, with additonal thanks to Sovereign Tech Resilience program of the Sovereign Tech Agency, found a flaw in Glib’s content type parsing logic. This buffer underflow vulnerability occurs because the length of a header line is stored in a signed integer, which can lead to integer wraparound for very large inputs. This results in pointer underflow and out-of-bounds memory access. Exploitation requires a local user to install or process a specially crafted treemagic file, which can lead to local denial of service or application instability.
- CVE-2026-1489
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treeplus, with additional thanks to Sovereign Tech Resilience program of the Sovereign Tech Agency, found a flaw in GLib. An integer overflow vulnerability in its Unicode case conversion implementation can lead to memory corruption. By processing specially crafted and extremely large Unicode strings, an attacker could trigger an undersized memory allocation, resulting in out-of-bounds writes. This could cause applications utilizing GLib for string conversion to crash or become unstable.
For Debian 10 buster, these problems have been fixed in version 2.58.3-2+deb10u10.
For Debian 9 stretch, these problems have been fixed in version 2.50.3-2+deb9u9.
We recommend that you upgrade your glib2.0 packages.
Further information about Extended LTS security advisories can be found in the dedicated section of our website.