SUSE: Kernel Important Security Update CVE-2025-21755 DoS 2025:03391-1
suse
September 29, 2025
* bsc#1245772 * bsc#1245795 * bsc#1246001 * bsc#1246356 * bsc#1247499
Summary
## This update for the Linux Kernel 5.14.21-150400_24_164 fixes several issues. The following security issues were fixed: * CVE-2025-38177: sch_hfsc: make hfsc_qlen_notify() idempotent (bsc#1246356). * CVE-2025-38181: calipso: Fix null-ptr-deref in calipso_req_{set,del}attr() (bsc#1246001). * CVE-2025-38498: do_change_type(): refuse to operate on unmounted/not ours mounts (bsc#1247499). * CVE-2025-38555: usb: gadget : fix use-after-free in composite_dev_cleanup() (bsc#1248298). * CVE-2024-26808: netfilter: nft_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain (bsc#1245772). * CVE-2025-21756: vsock: Keep the binding until socket destruction (bsc#1245795). * CVE-2025-21755: vsock: Orphan socket after transport release (bsc#1245795). ## Patch Instructions:
References
* bsc#1245772
* bsc#1245795
* bsc#1246001
* bsc#1246356
* bsc#1247499
* bsc#1248298
Cross-
* CVE-2024-26808
* CVE-2025-21755
* CVE-2025-21756
* CVE-2025-38177
* CVE-2025-38181
* CVE-2025-38498
* CVE-2025-38555
CVSS scores:
* CVE-2024-26808 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2024-26808 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2025-21755 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2025-21755 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2025-21756 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2025-21756 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2025-38177 ( SUSE ): 7.3
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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Severity
important
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Announcement ID: SUSE-SU-2025:03391-1
Release Date: 2025-09-27T09:33:34Z
Rating: important
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