CVE catalog

CVE-2024-46304

libcoap3: CVE-2024-46304

Severity: Medium
Published: Oct 9, 2024, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.56% · Oct 27, 2026

A NULL pointer dereference in libcoap v4.3.5-rc2 and below allows a remote attacker to cause a denial of service via the coap_handle_request_put_block function in src/coap_block.c.

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	libcoap3	sid	`4.3.5-4`	fixed
Debian	libcoap3	forky	`4.3.5-4`	fixed
Debian	libcoap3	trixie	`4.3.4-1.1+deb13u3`	vulnerable
Debian	libcoap3	bookworm	`4.3.1-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libcoap3	source	sid	`4.3.5-1`	not yet assigned	Not reported	[1084981]
Debian	libcoap3	source	forky	`4.3.5-1`	not yet assigned	Not reported	[1084981]
Debian	libcoap3	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1084981]
Debian	libcoap3	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1084981]

[Debian bug #1084981]

Notes

[trixie] libcoap3: Minor issue, no reverse deps in trixie [bookworm] libcoap3: Minor issue, no reverse deps in Bookworm

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libcoap3]Affected
Details (2)
- 4.3.1-1 · amd64 · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12
- 4.3.1-1 · arm64 · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12
[libcoap3-bin]Affected
Source package: [libcoap3]
Details (2)
- 4.3.1-1 · amd64 · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12
- 4.3.1-1 · arm64 · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12
[libcoap3-dev]Affected
Source package: [libcoap3]
Details (2)
- 4.3.1-1 · amd64 · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12
- 4.3.1-1 · arm64 · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12
[libcoap3-doc]Affected
Source package: [libcoap3]
Details (2)
- 4.3.1-1 · all · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12
- 4.3.1-1 · all · bookworm
  Affected
  dsa · libcoap3 · debian · bookworm; dsa · libcoap3 · debian · 12

[Debian 13 (Trixie)]

[libcoap3-bin]Affected
Source package: [libcoap3]
Details (2)
- 4.3.4-1.1+deb13u3 · amd64 · trixie
  Affected
  dsa · libcoap3 · debian · 13
- 4.3.4-1.1+deb13u3 · arm64 · trixie
  Affected
  dsa · libcoap3 · debian · 13
[libcoap3-dev]Affected
Source package: [libcoap3]
Details (2)
- 4.3.4-1.1+deb13u3 · amd64 · trixie
  Affected
  dsa · libcoap3 · debian · 13
- 4.3.4-1.1+deb13u3 · arm64 · trixie
  Affected
  dsa · libcoap3 · debian · 13
[libcoap3-doc]Affected
Source package: [libcoap3]
Details (2)
- 4.3.4-1.1+deb13u3 · all · trixie
  Affected
  dsa · libcoap3 · debian · 13
- 4.3.4-1.1+deb13u3 · all · trixie
  Affected
  dsa · libcoap3 · debian · 13
[libcoap3t64]Affected
Source package: [libcoap3]
Details (2)
- 4.3.4-1.1+deb13u3 · amd64 · trixie
  Affected
  dsa · libcoap3 · debian · 13
- 4.3.4-1.1+deb13u3 · arm64 · trixie
  Affected
  dsa · libcoap3 · debian · 13

Observed: Oct 27, 2026, 1:32:51 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]