Catalogo CVE

CVE-2026-89092

The nscd service in the GNU C Library 2.3.4 onwards may crash due to a stack overflow when a malicious DNS server returns too large a response for a DNS query, resulting in degraded DNS resolution f

[Catalogo CVE]

Gravità: Medium · CVSS 5.3CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Sep 10, 2026, 10:00:00 PM UTC
Updated: Sep 11, 2026, 2:18:35 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.24% · Oct 22, 2026

The nscd service in the GNU C Library 2.3.4 onwards may crash due to a stack overflow when a malicious DNS server returns too large a response for a DNS query, resulting in degraded DNS resolution for the system. Exploitation of this bug needs a system that has nscd enabled and using an untrusted DNS server for name resolution, with the compromised DNS server being capable of processing records large enough to result in a stack overflow in an nscd thread stack. During experimentation, bind 9 was unable to handle large records, but that could change in future or with a different name server. In typical installations, nscd is executed in an isolated context as its own user without a shell, due to which any compromise of that service is isolated. There is a remote possibility of nscd cache corruption if an attacker manages to get the stack pointer into a desired point in the heap, potentially resulting in other caches in nscd being overwritten with corrupt data through the stack overflow, until the buggy code path eventually results in a crash. Finally, a crash in nscd may result in performance degradation when resolving names, but it does not result in a denial of service.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	glibc	sid	`2.43-7`	fixed
Debian	glibc	forky	`2.43-7`	fixed
Debian	glibc	trixie	`2.41-12+deb13u4`	vulnerable
Debian	glibc	bookworm	`2.36-9+deb12u14`	vulnerable
Debian	glibc	bookworm-security	`2.36-9+deb12u7`	vulnerable
Ubuntu	eglibc	pro	`2.17-93ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu1`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.8`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.9`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.10`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.11`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.13`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.14`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm4`	vulnerable
Ubuntu	glibc	pro	`2.30-0ubuntu2`	vulnerable
Ubuntu	glibc	pro	`2.30-0ubuntu3`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu5`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu6`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu7`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.1`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.2`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.3`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.7`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.9`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.12`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.14`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.15`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.16`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.17`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.18`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.18+esm1`	vulnerable
Ubuntu	glibc	22.04	`2.34-0ubuntu3`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu1`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.1`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.3`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.4`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.5`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.6`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.7`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.8`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.9`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.10`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.11`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.12`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.13`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.14`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.15`	vulnerable
Ubuntu	glibc	24.04	`2.38-1ubuntu6`	vulnerable
Ubuntu	glibc	24.04	`2.38-3ubuntu1`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu1`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu2`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu6`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.1`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.2`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.3`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.4`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.5`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.6`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.7`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.8`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.9`	vulnerable
Ubuntu	glibc	26.04	`2.42-0ubuntu3`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu1`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu2`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu4`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu5`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu1`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu2`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu2.3`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu2.4`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	glibc	source	sid	`2.43-7`	not yet assigned	Not reported	[1147395]
Debian	glibc	source	forky	`2.43-7`	not yet assigned	Not reported	[1147395]
Debian	glibc	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1147395]
Debian	glibc	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1147395]

[Debian bug #1147395]

Notes

[trixie] glibc: Minor issue [bookworm] glibc: Minor issue, performance degradation

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[glibc-doc]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[glibc-source]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dbg]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dev]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dev-i386]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dev-x32]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-i386]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-x32]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-bin]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-dev-bin]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-devtools]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-l10n]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[locales]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[locales-all]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[nscd]Interessata
Pacchetto sorgente: [glibc]
Dettagli (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Interessata
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12

[Debian 13 (Trixie)]

[glibc-doc]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.41-12+deb13u3 · all · trixie
  Interessata
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · all · trixie
  Interessata
  nvd · glibc · debian · 13
[glibc-source]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.41-12+deb13u3 · all · trixie
  Interessata
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · all · trixie
  Interessata
  nvd · glibc · debian · 13
[libc6]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.41-12+deb13u3 · amd64 · trixie
  Interessata
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · arm64 · trixie
  Interessata
  nvd · glibc · debian · 13
[libc6-dbg]Interessata
Pacchetto sorgente: [glibc]
Dettagli (2)
- 2.41-12+deb13u3 · amd64 · trixie
  Interessata
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · arm64 · trixie
  Interessata
  nvd · glibc · debian · 13

Altri risultati

Osservato: Oct 23, 2026, 9:28:27 PM UTC

Riferimenti

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]