CVE-2025-68221
published 2025-12-16CVE-2025-68221: In the Linux kernel, the following vulnerability has been resolved: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr Fix inverted WARN_ON_ONCE condition…
PriorityP420high7.2
EPSS
0.18%
8.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONCE condition that prevented normal address
removal counter updates. The current code only executes decrement
logic when the counter is already 0 (abnormal state), while
normal removals (counter > 0) are ignored.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.17.10-1 (forky) | linux 6.17.10-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 63611391850850bf27f81afb0d0b6d1237a34006 < f7d953c38245c0e9d8e268fb6a9e524602fb44ec | f7d953c38245c0e9d8e268fb6a9e524602fb44ec |
| linux | linux | >= 63611391850850bf27f81afb0d0b6d1237a34006 < 92e239e36d600002559074994a545fcfac9afd2d | 92e239e36d600002559074994a545fcfac9afd2d |
| linux | linux_kernel | >= 0 < 6.17.10-1 | 6.17.10-1 |
| linux | linux_kernel | >= 0 < 6.17.0-19.19 | 6.17.0-19.19 |
| linux | linux_kernel | >= 6.15.0 < 6.17.10 | 6.17.10 |
CVSS provenance
osv7.2HIGH
vendor_ubuntu7.2HIGH
vendor_redhat5.5HIGH
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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: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
vendor_redhat·2025-12-16·CVSS 5.5
CVE-2025-68221 [HIGH] CWE-480 kernel: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
kernel: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONCE condition that prevented normal address
removal counter updates. The current code only executes decrement
logic when the counter is already 0 (abnormal state), while
normal removals (counter > 0) are ignored.
A logic error was found in the MPTCP (Multipath TCP) path manager in the Linux kernel. An inverted WARN_ON_ONCE condition in mptcp_pm_nl_rm_addr() causes address removal counter updates to only execute in the abnormal case (counter = 0) while normal removals are ignored. This breaks MPTCP address management.
Statement: MPTCP must be enabled and in active use for this to m
Debian
CVE-2025-68221: linux - In the Linux kernel, the following vulnerability has been resolved: mptcp: fix ...
vendor_debian·2025
CVE-2025-68221 [LOW] CVE-2025-68221: linux - In the Linux kernel, the following vulnerability has been resolved: mptcp: fix ...
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr Fix inverted WARN_ON_ONCE condition that prevented normal address removal counter updates. The current code only executes decrement logic when the counter is already 0 (abnormal state), while normal removals (counter > 0) are ignored.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved (fixed in 6.17.10-1)
sid: resolved (fixed in 6.17.10-1)
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
CVE-2025-68221: In the Linux kernel, the following vulnerability has been resolved: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr Fix inverted WARN_ON_ONCE
osv·2025-12-16
CVE-2025-68221 CVE-2025-68221: In the Linux kernel, the following vulnerability has been resolved: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr Fix inverted WARN_ON_ONCE
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr Fix inverted WARN_ON_ONCE condition that prevented normal address removal counter updates. The current code only executes decrement logic when the counter is already 0 (abnormal state), while normal removals (counter > 0) are ignored.
GHSA
GHSA-9rj5-8f4h-5c5g: In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONC
ghsa_unreviewed·2025-12-16
CVE-2025-68221 GHSA-9rj5-8f4h-5c5g: In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONC
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONCE condition that prevented normal address
removal counter updates. The current code only executes decrement
logic when the counter is already 0 (abnormal state), while
normal removals (counter > 0) are ignored.
OSV
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
osv·2025-12-16
CVE-2025-68221 mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONCE condition that prevented normal address
removal counter updates. The current code only executes decrement
logic when the counter is already 0 (abnormal state), while
normal removals (counter > 0) are ignored.
No detection rules found.
No public exploits indexed.
Wiz
CVE-2025-68221 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2025-68221 CVE-2025-68221 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-68221 :
Linux Kernel vulnerability analysis and mitigation
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONCE condition that prevented normal address
removal counter updates. The current code only executes decrement
logic when the counter is already 0 (abnormal state), while
normal removals (counter > 0) are ignored.
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) 7.7
Exploitation Probability (EPSS) N/A
Affected packages and libraries
kernel-debug
kernel-devel
Sources
NVD
Bugzilla
CVE-2025-68221 kernel: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
bugzilla·2025-12-16
CVE-2025-68221 [HIGH] CVE-2025-68221 kernel: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
CVE-2025-68221 kernel: mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix address removal logic in mptcp_pm_nl_rm_addr
Fix inverted WARN_ON_ONCE condition that prevented normal address
removal counter updates. The current code only executes decrement
logic when the counter is already 0 (abnormal state), while
normal removals (counter > 0) are ignored.
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121633-CVE-2025-68221-7f16@gregkh/T
2025-12-16
Published