CVE-2025-68300
published 2025-12-16CVE-2025-68300: In the Linux kernel, the following vulnerability has been resolved: fs/namespace: fix reference leak in grab_requested_mnt_ns lookup_mnt_ns() already takes a…
PriorityP417high7.2
EPSS
0.18%
7.9th percentile
In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() already takes a reference on mnt_ns.
grab_requested_mnt_ns() doesn't need to take an extra reference.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.17.11-1 (forky) | linux 6.17.11-1 (forky) |
| linux | linux | >= 6.12.59 < 6.12.61 | 6.12.61 |
| linux | linux | >= 6.17.9 < 6.17.11 | 6.17.11 |
| linux | linux | >= 78f0e33cd6c939a555aa80dbed2fec6b333a7660 < 7b6dcd9bfd869eee7693e45b1817dac8c56e5f86 | 7b6dcd9bfd869eee7693e45b1817dac8c56e5f86 |
| linux | linux | >= 8ff97ade912dcfc5ac1783c4b8d615aacd26fd17 < fe256e59b8e7f126b2464ee32bd9fee131f0a883 | fe256e59b8e7f126b2464ee32bd9fee131f0a883 |
| linux | linux | >= ba306daa7fa8ae0be5d64c215e9d43a88b4bc8bf < 4a16b2a0c1f033f95f5d0b98b9e40e8bf7c4c2c5 | 4a16b2a0c1f033f95f5d0b98b9e40e8bf7c4c2c5 |
| linux | linux_kernel | >= 0 < 6.17.11-1 | 6.17.11-1 |
| linux | linux_kernel | >= 0 < 6.17.0-19.19 | 6.17.0-19.19 |
| linux | linux_kernel | >= 6.12.59 < 6.12.61 | 6.12.61 |
| linux | linux_kernel | >= 6.17.9 < 6.17.11 | 6.17.11 |
CVSS provenance
osv7.2HIGH
vendor_ubuntu7.2HIGH
vendor_redhat5.5LOW
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Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2026-04-06·CVSS 7.2
CVE-2026-23404 [HIGH] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality and integrity. (CVE-2025-62626)
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibl
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities
vendor_ubuntu·2026-04-01·CVSS 7.2
CVE-2025-68356 [HIGH] Linux kernel (Raspberry Pi) vulnerabilities
Title: Linux kernel (Raspberry Pi) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of co
Ubuntu
Linux kernel (Azure) vulnerabilities
vendor_ubuntu·2026-03-25·CVSS 7.2
CVE-2025-68727 [HIGH] Linux kernel (Azure) vulnerabilities
Title: Linux kernel (Azure) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confident
Ubuntu
Linux kernel (Real-time) vulnerabilities
vendor_ubuntu·2026-03-23·CVSS 7.2
CVE-2025-68728 [HIGH] Linux kernel (Real-time) vulnerabilities
Title: Linux kernel (Real-time) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confi
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-03-17·CVSS 7.2
CVE-2025-68727 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality a
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-03-16·CVSS 7.2
CVE-2025-68380 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality a
Red Hat
kernel: fs/namespace: fix reference leak in grab_requested_mnt_ns
vendor_redhat·2025-12-16·CVSS 5.5
CVE-2025-68300 [LOW] CWE-772 kernel: fs/namespace: fix reference leak in grab_requested_mnt_ns
kernel: fs/namespace: fix reference leak in grab_requested_mnt_ns
In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() already takes a reference on mnt_ns.
grab_requested_mnt_ns() doesn't need to take an extra reference.
Package: kernel (Red Hat Enterprise Linux 10) - Fix deferred
Package: kernel (Red Hat Enterprise Linux 6) - Out of support scope
Package: kernel (Red Hat Enterprise Linux 7) - Fix deferred
Package: kernel-rt (Red Hat Enterprise Linux 7) - Fix deferred
Package: kernel (Red Hat Enterprise Linux 8) - Fix deferred
Package: kernel-rt (Red Hat Enterprise Linux 8) - Fix deferred
Package: kernel (Red Hat Enterprise Linux 9) - Fix deferred
Package: kernel-rt (Red Hat Enterprise Linux 9
Debian
CVE-2025-68300: linux - In the Linux kernel, the following vulnerability has been resolved: fs/namespac...
vendor_debian·2025
CVE-2025-68300 [LOW] CVE-2025-68300: linux - In the Linux kernel, the following vulnerability has been resolved: fs/namespac...
In the Linux kernel, the following vulnerability has been resolved: fs/namespace: fix reference leak in grab_requested_mnt_ns lookup_mnt_ns() already takes a reference on mnt_ns. grab_requested_mnt_ns() doesn't need to take an extra reference.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved (fixed in 6.17.11-1)
sid: resolved (fixed in 6.17.11-1)
trixie: resolved
OSV
linux-oem-6.17 vulnerabilities
osv·2026-04-06·CVSS 7.2
CVE-2025-62626 [HIGH] linux-oem-6.17 vulnerabilities
linux-oem-6.17 vulnerabilities
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality and integrity. (CVE-2025-62626)
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853, CVE-2026-23268, CVE-2026-23269, CVE-2026
OSV
linux-raspi vulnerabilities
osv·2026-04-01·CVSS 7.2
[HIGH] linux-raspi vulnerabilities
linux-raspi vulnerabilities
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality and integrity. (CVE-2025-62626)
Several security issues were discovered in
OSV
linux-azure, linux-azure-6.17 vulnerabilities
osv·2026-03-25·CVSS 7.2
[HIGH] linux-azure, linux-azure-6.17 vulnerabilities
linux-azure, linux-azure-6.17 vulnerabilities
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality and integrity. (CVE-2025-62626)
Several security issues
OSV
linux-realtime-6.17 vulnerabilities
osv·2026-03-23·CVSS 7.2
[HIGH] linux-realtime-6.17 vulnerabilities
linux-realtime-6.17 vulnerabilities
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality and integrity. (CVE-2025-62626)
Several security issues were disco
OSV
linux-gcp-6.17, linux-realtime vulnerabilities
osv·2026-03-17·CVSS 7.2
[HIGH] linux-gcp-6.17, linux-realtime vulnerabilities
linux-gcp-6.17, linux-realtime vulnerabilities
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidentiality and integrity. (CVE-2025-62626)
Several security issues
OSV
linux, linux-aws, linux-aws-6.17, linux-gcp, linux-hwe-6.17, linux-oracle, linux-oracle-6.17 vulnerabilities
osv·2026-03-16·CVSS 7.2
[HIGH] linux, linux-aws, linux-aws-6.17, linux-gcp, linux-hwe-6.17, linux-oracle, linux-oracle-6.17 vulnerabilities
linux, linux-aws, linux-aws-6.17, linux-gcp, linux-hwe-6.17, linux-oracle, linux-oracle-6.17 vulnerabilities
Qualys discovered that several vulnerabilities existed in the AppArmor
Linux kernel Security Module (LSM). An unprivileged local attacker could
use these issues to load, replace, and remove arbitrary AppArmor profiles
causing denial of service, exposure of sensitive information (kernel
memory), local privilege escalation, or possibly escape a container.
(LP: #2143853)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local attacker could
possibly use this issue to influence the values returned by the RDSEED
instruction causing loss of confidenti
OSV
fs/namespace: fix reference leak in grab_requested_mnt_ns
osv·2025-12-16
CVE-2025-68300 fs/namespace: fix reference leak in grab_requested_mnt_ns
fs/namespace: fix reference leak in grab_requested_mnt_ns
In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() already takes a reference on mnt_ns.
grab_requested_mnt_ns() doesn't need to take an extra reference.
GHSA
GHSA-w2qx-7hv3-25hh: In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() alread
ghsa_unreviewed·2025-12-16
CVE-2025-68300 GHSA-w2qx-7hv3-25hh: In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() alread
In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() already takes a reference on mnt_ns.
grab_requested_mnt_ns() doesn't need to take an extra reference.
OSV
CVE-2025-68300: In the Linux kernel, the following vulnerability has been resolved: fs/namespace: fix reference leak in grab_requested_mnt_ns lookup_mnt_ns() already
osv·2025-12-16
CVE-2025-68300 CVE-2025-68300: In the Linux kernel, the following vulnerability has been resolved: fs/namespace: fix reference leak in grab_requested_mnt_ns lookup_mnt_ns() already
In the Linux kernel, the following vulnerability has been resolved: fs/namespace: fix reference leak in grab_requested_mnt_ns lookup_mnt_ns() already takes a reference on mnt_ns. grab_requested_mnt_ns() doesn't need to take an extra reference.
No detection rules found.
No public exploits indexed.
Wiz
CVE-2025-68300 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2025-68300 CVE-2025-68300 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-68300 :
Linux Kernel vulnerability analysis and mitigation
In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() already takes a reference on mnt_ns.
grab_requested_mnt_ns() doesn't need to take an extra reference.
Source : NVD
Published December 16, 2025
CNA Score N/A
Affected Technologies
Linux Kernel
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 6.8
Exploitation Probability (EPSS) N/A
Affected packages and libraries
kernel-64k-modules-core
kernel-rt-64k-modules-internal
Sources
NVD
Debian 13 No Fix Added at: Dec 17, 2025
Debian 14 Has Fix Added at: Dec 17, 2025
R
Bugzilla
CVE-2025-68300 kernel: fs/namespace: fix reference leak in grab_requested_mnt_ns
bugzilla·2025-12-16
CVE-2025-68300 [LOW] CVE-2025-68300 kernel: fs/namespace: fix reference leak in grab_requested_mnt_ns
CVE-2025-68300 kernel: fs/namespace: fix reference leak in grab_requested_mnt_ns
In the Linux kernel, the following vulnerability has been resolved:
fs/namespace: fix reference leak in grab_requested_mnt_ns
lookup_mnt_ns() already takes a reference on mnt_ns.
grab_requested_mnt_ns() doesn't need to take an extra reference.
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121643-CVE-2025-68300-ec22@gregkh/T
2025-12-16
Published