CVE catalog

CVE-2026-15712

Severity: Medium · CVSS 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jul 14, 2026, 10:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.50% · Oct 25, 2026

A heap buffer over-read vulnerability was discovered in libsoup's (versions: libsoup 3.0 to 3.7.0) HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the "Additional Debug Data" payload by assuming the data stream is a safely NUL-terminated C-string. Because the parser lacks strict length-boundary verification before reading this data, a remote, unauthenticated attacker can intentionally send a malformed GOAWAY frame missing the appropriate null delimiter. This causes the library to read past the end of the allocated buffer, triggering an application crash that results in a denial of service (DoS), or potentially exposing fragments of memory contents.

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	libsoup3	sid	`3.8.0-3`	fixed
Debian	libsoup3	forky	`3.8.0-3`	fixed
Debian	libsoup3	trixie	`3.6.5-3`	vulnerable
Debian	libsoup3	bookworm	`3.2.3-0+deb12u2`	vulnerable
Debian	libsoup2.4	trixie	`2.74.3-10.1`	not affected
Debian	libsoup2.4	bookworm	`2.74.3-1+deb12u1`	not affected
Ubuntu	libsoup3	pro	`3.0.4-2`	vulnerable
Ubuntu	libsoup3	pro	`3.0.4-3`	vulnerable
Ubuntu	libsoup3	pro	`3.0.5-1`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm1`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm2`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm3`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm4`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm5`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm6`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm7`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm8`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm9`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.2-4`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-1`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-2`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-4`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5build1`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5build2`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.1`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.2`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.3`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.4`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.5`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.6`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.7`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.8`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.9`	vulnerable
Ubuntu	libsoup3	26.10	`3.6.6-1`	vulnerable
Ubuntu	libsoup3	26.10	`3.6.6-1ubuntu3`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-4`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-5`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-6`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-7`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-9`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.6-1`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.6-1ubuntu0.1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libsoup3	source	sid	`3.8.0-1`	not yet assigned	Not reported	[1142841]
Debian	libsoup3	source	forky	`3.8.0-1`	not yet assigned	Not reported	[1142841]
Debian	libsoup3	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1142841]
Debian	libsoup3	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1142841]
Debian	libsoup2.4	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	libsoup2.4	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

[Debian bug #1142841]

Notes

[trixie] libsoup3: Minor issue [bookworm] libsoup3: Limited support

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[gir1.2-soup-3.0]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-0]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-common]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-dev]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-doc]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-tests]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[gir1.2-soup-2.4]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
[libsoup2.4-1]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
[libsoup2.4-common]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · all · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · all · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
[libsoup2.4-dev]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
[libsoup2.4-doc]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · all · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · all · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
[libsoup2.4-tests]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
[libsoup-gnome2.4-1]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
[libsoup-gnome2.4-dev]Not affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Not affected
  nvd · libsoup2.4 · debian · bookworm

[Debian 13 (Trixie)]

[gir1.2-soup-3.0]Affected
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · amd64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
- 3.6.5-3 · arm64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
[libsoup-3.0-0]Affected
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · amd64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
- 3.6.5-3 · arm64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
[libsoup-3.0-common]Affected
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · all · trixie
  Affected
  nvd · libsoup3 · debian · 13
- 3.6.5-3 · all · trixie
  Affected
  nvd · libsoup3 · debian · 13
[libsoup-3.0-dev]Affected
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · amd64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
- 3.6.5-3 · arm64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
[libsoup-3.0-doc]Affected
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · all · trixie
  Affected
  nvd · libsoup3 · debian · 13
- 3.6.5-3 · all · trixie
  Affected
  nvd · libsoup3 · debian · 13
[libsoup-3.0-tests]Affected
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · amd64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
- 3.6.5-3 · arm64 · trixie
  Affected
  nvd · libsoup3 · debian · 13

Observed: Oct 23, 2026, 9:44:20 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]