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Red Hat Security Advisory

RHSA-2025:21118

kernel security update

Released 2025-11-12 · Red Hat rating Moderate · View on Red Hat →

Fixed in

Fixes 11 records

Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00449 Published 2025-09-05 Partial fix · 5.10.249, 5.15.190 +5 CWE-203
Priority MEDIUM 43

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix buffer free/clear order in deferred receive path Fix a use-after-free window by correcting the buffer release sequence in the deferred r…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00481 Published 2025-09-19 Partial fix · 5.4.299, 5.10.243 +6 CWE-787
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result() If the ssid->datalen is more than IEEE80211_MAX_SSID_LEN (32) it would lead to memor…

CVSS 3.1HIGH 8.8 Adjacent network No auth No interaction EPSS 0.00222 Published 2025-09-19 Partial fix · 6.1.151, 6.3 +4 CWE-787
Priority LOW 38

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: Validate length in packet header before skb_put() When receiving a vsock packet in the guest, only the virtqueue buffer size is validated…

CVSS 3.1HIGH 8.4 Local No auth No interaction EPSS 0.00167 Published 2025-09-05 Partial fix · 6.1.149, 6.6.103 +3 CWE-787
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: kernfs: Fix UAF in polling when open file is released A use-after-free (UAF) vulnerability was identified in the PSI (Pressure Stall Information) monito…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00154 Published 2025-09-23 Fixed in 6.1.153, 6.6.107 +3 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: mm: swap: fix potential buffer overflow in setup_clusters() In setup_swap_map(), we only ensure badpages are in range (0, last_page].

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00183 Published 2025-09-07 Fixed in 6.12.42, 6.15.10 +2 CWE-120
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix a race when updating an existing write After nfs_lock_and_join_requests() tests for whether the request is still attached to the mapping, nothi…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00159 Published 2025-09-05 Partial fix · 5.10.242, 5.15.191 +5 CWE-362
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: do_change_type(): refuse to operate on unmounted/not ours mounts Ensure that propagation settings can only be changed for mounts located in the caller's…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00219 Published 2025-07-30 Partial fix · 5.4.295, 5.10.239 +6
Priority LOW 30

In the Linux kernel, the following vulnerability has been resolved: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare Observed on kernel 6.6 (present on master as well): BUG: KASAN: slab-out-of-bounds in memcmp+0x98…

CVSS 3.1HIGH 7.1 Local Low privileges No interaction EPSS 0.00167 Published 2025-09-16 Partial fix · 3.9, 5.4.298 +7 CWE-125
Priority LOW 30

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Validate UAC3 cluster segment descriptors UAC3 class segment descriptors need to be verified whether their sizes match with the declare…

CVSS 3.1HIGH 7.1 Local Low privileges No interaction EPSS 0.00179 Published 2025-09-11 Partial fix · 5.4.297, 5.10.241 +7 CWE-125
TI-2025-26970 CVE-2025-40300 · GHSA-x8qw-46ww-c957

x86/vmscape: Add conditional IBPB mitigation

Priority LOW 25

In the Linux kernel, the following vulnerability has been resolved: x86/vmscape: Add conditional IBPB mitigation VMSCAPE is a vulnerability that exploits insufficient branch predictor isolation between a guest and a user…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00378 Published 2025-09-11 Partial fix · 3.17, 4.5 +7