SUSE: Kernel Important Security Update 2025:4521-1 CVE-2025-21710 DoS
suse
December 24, 2025
An update that solves 65 vulnerabilities and has nine security fixes can now be installed.
Summary
## The SUSE Linux Enterprise 15 SP6 RT kernel was updated to receive various security bugfixes. The following security bugs were fixed: * CVE-2022-50253: bpf: make sure skb->len != 0 when redirecting to a tunneling device (bsc#1249912). * CVE-2023-53676: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() (bsc#1251786). * CVE-2025-21710: tcp: correct handling of extreme memory squeeze (bsc#1237888). * CVE-2025-37916: pds_core: remove write-after-free of client_id (bsc#1243474). * CVE-2025-38359: s390/mm: Fix in_atomic() handling in do_secure_storage_access() (bsc#1247076). * CVE-2025-38361: drm/amd/display: Check dce_hwseq before dereferencing it (bsc#1247079). * CVE-2025-39788: scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE (bsc#1249547).
Topics Covered
References
* bsc#1232223
* bsc#1237888
* bsc#1243474
* bsc#1245193
* bsc#1247076
* bsc#1247079
* bsc#1247500
* bsc#1247509
* bsc#1249547
* bsc#1249912
* bsc#1249982
* bsc#1250176
* bsc#1250237
* bsc#1250252
* bsc#1250705
* bsc#1251120
* bsc#1251786
* bsc#1252063
* bsc#1252267
* bsc#1252303
* bsc#1252353
* bsc#1252681
* bsc#1252763
* bsc#1252773
* bsc#1252780
* bsc#1252794
* bsc#1252795
* bsc#1252809
* bsc#1252817
* bsc#1252821
* bsc#1252836
* bsc#1252845
* bsc#1252862
* bsc#1252912
* bsc#1252917
* bsc#1252928
* bsc#1253018
* bsc#1253176
* bsc#1253275
* bsc#1253318
* bsc#1253324
* bsc#1253349
* bsc#1253352
* bsc#1253355
* bsc#1253360
* bsc#1253362
* bsc#1253363
* bsc#1253367
* bsc#1253369
* bsc#1253393
* bsc#1253395
* bsc#1253403
* bsc#1253407
* bsc#1253409
* bsc#1253412
* bsc#1253416
* bsc#1253421
* bsc#1253423
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Severity
important
Lowest
Low
Medium
High
Critical
Announcement ID: SUSE-SU-2025:4521-1
Release Date: 2025-12-24T12:42:51Z
Rating: important
Topics Covered
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