CVE-2026-71219
Gfs2-utils: gfs2-utils: stack overflow via alloca(1<<di_depth) in hash table traversal
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Gfs2-utils: gfs2-utils: stack overflow via alloca(1<<di_depth) in hash table traversal
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
- Record
CVE-2026-71219- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-770
- Updated
- 2026-11-02
EUVDEUVD-2026-70447
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
- Record
EUVD-2026-70447- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-5ggp-489g-rjqr
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk...
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
- Record
GHSA-5ggp-489g-rjqr- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-770
- Updated
- 2026-11-02
NVD
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
- Record
CVE-2026-71219- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-770
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-71219
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
- Record
DEBIAN-CVE-2026-71219- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-71219
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
- Record
UBUNTU-CVE-2026-71219- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVAZL-99906 No score
CVE-2026-71219 affecting package gfs2-utils 3.5.1-1
A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.
- Record
AZL-99906- Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
gfs2-utilsAzure Linux:3 |
through 3.5.1-1 | None known |
gfs2-utilsDebian:12 |
All versions, plus listed versions 3.5.0-23.5.1-13.5.1-23.6.0-13.6.1-13.6.1-2 |
None known |
gfs2-utilsDebian:13 |
All versions, plus listed versions 3.6.1-13.6.1-2 |
None known |
gfs2-utilsDebian:14 |
before 3.6.1-2, plus listed versions 3.6.1-1 |
3.6.1-2 |
gfs2-utilsUbuntu:16.04:LTS |
All versions, plus listed versions 3.1.6-0ubuntu23.1.6-0ubuntu3 |
None known |
gfs2-utilsUbuntu:18.04:LTS |
All versions, plus listed versions 3.1.9-2ubuntu1 |
None known |
gfs2-utilsUbuntu:20.04:LTS |
All versions, plus listed versions 3.2.0-23.2.0-3 |
None known |
gfs2-utilsUbuntu:22.04:LTS |
All versions, plus listed versions 3.3.0-23.4.1-2 |
None known |
gfs2-utilsUbuntu:24.04:LTS |
All versions, plus listed versions 3.5.1-1 |
None known |
gfs2-utilsUbuntu:26.10 |
All versions, plus listed versions 3.6.1-1build13.6.1-2ubuntu1 |
None known |
gfs2-utilsUbuntu:26.04:LTS |
All versions, plus listed versions 3.6.1-13.6.1-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-71219 is a medium vulnerability (CVSS 4.7) in Red Hat Enterprise Linux 7, published September 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.11%, the 1st percentile. Fixed in gfs2-utils 3.6.1-2.