CVE-2025-21638

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: authenable: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

CVE-2025-21640

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookiehmacalg: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

UBUNTU-CVE-2025-21635

In the Linux kernel, the following vulnerability has been resolved: rds: sysctl: rdstcprcv,sndbuf: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

UBUNTU-CVE-2025-21638

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: authenable: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

UBUNTU-CVE-2025-21637

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: udpport: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

UBUNTU-CVE-2025-21640

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookiehmacalg: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

UBUNTU-CVE-2025-21639

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: rtomin/max: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

UBUNTU-CVE-2025-21641

In the Linux kernel, the following vulnerability has been resolved: mptcp: sysctl: blackhole timeout: avoid using current-nsproxy As mentioned in the previous commit, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

CVE-2025-21642

CVE-2025-21642 affects the Linux kernel’s MPTCP subsystem. The issue arises from using current->nsproxy/netns when accessing per-netns data via sysctl entries (net/mptcp/ctrl.c), which can diverge from the netns the table is associated with. The described consequence is a general protection fa...

CVE-2025-21642

In the Linux kernel, the following vulnerability has been resolved: mptcp: sysctl: sched: avoid using current-nsproxy Using the 'net' structure via 'current' is not recommended for different reasons. First, if the goal is to use it to read or write per-netns data, this is inconsistent with how th...

CVE-2025-21641

CVE-2025-21641 concerns the Linux kernel, where the mptcp: sysctl: blackhole timeout vulnerability could occur from using current->nsproxy. The issue arises from reading net namespace data via the current task, which could be NULL for certain states (e.g., task exiting), risking a null pointer...

CVE-2025-21641

In the Linux kernel, the following vulnerability has been resolved: mptcp: sysctl: blackhole timeout: avoid using current-nsproxy As mentioned in the previous commit, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

CVE-2025-21640

Summary of CVE-2025-21640 (Linux kernel SCTP): The vulnerability is in the Linux kernel SCTP sysctl handling for cookie_hmac_alg, linked to using current->nsproxy. The description notes that current->nsproxy can be NULL (e.g., when the current task is exiting), which can lead to an Oops (nu...

CVE-2025-21640 sctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookiehmacalg: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

CVE-2025-21640 sctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookiehmacalg: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

CVE-2025-21639 sctp: sysctl: rto_min/max: avoid using current->nsproxy

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: rtomin/max: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

CVE-2025-21639 sctp: sysctl: rto_min/max: avoid using current->nsproxy

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: rtomin/max: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...

CVE-2025-21639

The CVE-2025-21639 issue is in the Linux kernel SCTP sysctl handling (rto_min/rto_max) where current->nsproxy was used to read netns, risking a NULL pointer dereference and Oops when the task is exiting. The fix, as described in the initial document, replaces current->nsproxy usage with ret...

CVE-2025-21638

CVE-2025-21638 affects the Linux kernel SCTP sysctl: auth_enable. Root cause: using current->nsproxy can be NULL or inconsistently reflect netns, causing potential issues; remediation fixes rely on obtaining net from table->data via container_of() rather than current. Affected advisories in...

CVE-2025-21639

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: rtomin/max: avoid using current-nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the...