In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup()… (CVE-2026-53225)
A critical vulnerability (CVE-2026-53225) in the Linux kernel SCTP protocol was fixed. The flaw involved reading uninitialized memory when processing truncated ASCONF chunks containing IPv6 address parameters. An unauthenticated SCTP peer could exploit this to cause the kernel to read up to 16 bytes of uninitialized memory, potentially leading to information disclosure and denial of service. The vulnerability affects many specific Linux kernel versions. Official patches are available and included in updated Linux kernel packages. Users are advised to update and reboot their systems to apply the fixes.
AI Analysis
Technical Summary
The vulnerability CVE-2026-53225 in the Linux kernel SCTP protocol occurs in the __sctp_rcv_asconf_lookup() function, which insufficiently validates the length of IPv6 address parameters in ASCONF chunks. An unauthenticated SCTP peer can send a truncated ASCONF chunk that causes the kernel to read uninitialized memory beyond the parameter boundary. This flaw can lead to information disclosure and denial of service. The sibling function __sctp_rcv_init_lookup() properly bounds parameters, but __sctp_rcv_asconf_lookup() does not. The issue has been resolved in updated Linux kernel versions.
Potential Impact
An unauthenticated SCTP peer can cause the Linux kernel to read up to 16 bytes of uninitialized memory, potentially exposing sensitive information and causing denial of service due to improper memory handling. This impacts confidentiality and availability of affected systems.
Mitigation Recommendations
A patch is available and has been incorporated into updated Linux kernel packages. Users should apply the official updates provided by their Linux distribution vendors and reboot their systems to ensure the vulnerability is fully mitigated. No additional mitigation steps are required beyond applying the official fix.
In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup()… (CVE-2026-53225)
Description
A critical vulnerability (CVE-2026-53225) in the Linux kernel SCTP protocol was fixed. The flaw involved reading uninitialized memory when processing truncated ASCONF chunks containing IPv6 address parameters. An unauthenticated SCTP peer could exploit this to cause the kernel to read up to 16 bytes of uninitialized memory, potentially leading to information disclosure and denial of service. The vulnerability affects many specific Linux kernel versions. Official patches are available and included in updated Linux kernel packages. Users are advised to update and reboot their systems to apply the fixes.
CVSS v3.1
Score 9.1critical
Affected software
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protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-53225 in the Linux kernel SCTP protocol occurs in the __sctp_rcv_asconf_lookup() function, which insufficiently validates the length of IPv6 address parameters in ASCONF chunks. An unauthenticated SCTP peer can send a truncated ASCONF chunk that causes the kernel to read uninitialized memory beyond the parameter boundary. This flaw can lead to information disclosure and denial of service. The sibling function __sctp_rcv_init_lookup() properly bounds parameters, but __sctp_rcv_asconf_lookup() does not. The issue has been resolved in updated Linux kernel versions.
Potential Impact
An unauthenticated SCTP peer can cause the Linux kernel to read up to 16 bytes of uninitialized memory, potentially exposing sensitive information and causing denial of service due to improper memory handling. This impacts confidentiality and availability of affected systems.
Mitigation Recommendations
A patch is available and has been incorporated into updated Linux kernel packages. Users should apply the official updates provided by their Linux distribution vendors and reboot their systems to ensure the vulnerability is fully mitigated. No additional mitigation steps are required beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53225
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 4.0
Threat ID: 6a5a00ee91ae9bcd3f7f2b41
Added to database: 07/17/2026, 10:16:14 UTC
Last enriched: 09/07/2026, 22:06:31 UTC
Last updated: 09/10/2026, 19:36:54 UTC
Views: 22
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