Vulnerability Database · Debian · Package report
glibc: vulnerability history, versions and safety
glibc is a package in the Debian ecosystem. Vulert records 20 vulnerabilities for it across 120 releases, from Aug 2022 to Sep 2026. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.
No patched version yet — these are the ones to plan around.
See the unfixed vulnerabilities →No published version shipped hostile code.
Vulert verdict on glibc i
Updated on 23 Oct 2026
Careful: 5 of the 20 vulnerabilities Vulert records for this package have no fix yet. Plan around those, or apply the workaround listed for each. The rest have a fixed version to move to.
What to do: Plan around the 5 vulnerabilities with no published fix: each lists the affected range and any workaround that reduces exposure. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →
- Vulnerabilities on record 20 over 4 years · 6 in the last year i
- Latest disclosure 28 Sep 2026 i
- Highest CVSS 7.8 i
- With no published fix 5 i
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01 Versions
Which versions are affected
Every version Vulert holds for glibc, newest first, with the vulnerabilities that name it. A version with a count of zero has no recorded vulnerabilities; open a version to see the vulnerabilities it is exposed to.
Newest 120 of 133 versions on record. Severity counts are the vulnerabilities recorded against that exact release.
02 Disclosure history
How often vulnerabilities are recorded
Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 6 of the 20 were recorded in the last 12 months.
Other ways into the data
03 Vulnerabilities
Recorded vulnerabilities for glibc
| Vulnerability | Severity | Fixed version ↓ | Disclosed ↓ |
|---|---|---|---|
| Heap-Based Buffer Overflow in glibc: Critical Vulnerability Overview | 7.8 high | 2.36-9+deb12u4 | 31 Jan 2024 |
| Information Leakage Vulnerability in glibc: CVE-2021-3998 | 7.5 high | 2.33-4 | 24 Aug 2022 |
| Off-by-One Heap Buffer Overflow in glibc: Critical Vulnerability Overview | 7.5 high | 2.36-9+deb12u4 | 31 Jan 2024 |
| Potential Stack Disclosure in glibc Due to DNS Response Handling | 6.5 medium | 2.36-9+deb12u3 | 18 Sep 2023 |
| Critical Vulnerability in glibc Package: CVE-2026-86805 | 6.3 medium | No fix published | 22 Sep 2026 |
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Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315
