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Red Hat Security Advisory

RHSA-2025:21091

kernel security update

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

Fixed in

Fixes 23 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
TI-2023-29595 CVE-2023-53305 · GHSA-xw54-m5g5-fqcg

Bluetooth: L2CAP: Fix use-after-free

Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free Fix potential use-after-free in l2cap_le_command_rej.

CVSS 3.1HIGH 8.8 Adjacent network No auth No interaction EPSS 0.00232 Published 2025-09-16 Partial fix · 4.14.324, 4.19.293 +6 CWE-416
TI-2022-25867 CVE-2022-50386 · GHSA-q9hj-m4q6-fcrh

Bluetooth: L2CAP: Fix user-after-free

Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix user-after-free This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace: Blue…

CVSS 3.1HIGH 8.8 Adjacent network No auth No interaction EPSS 0.00369 Published 2025-09-18 Partial fix · 4.9.331, 4.14.296 +7 CWE-416
Priority LOW 38

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: Fix OOB and integer underflow when rx packets Make sure mwifiex_process_mgmt_packet, mwifiex_process_sta_rx_packet and mwifiex_process_ua…

CVSS 3.1HIGH 8.8 Adjacent network No auth No interaction EPSS 0.00243 Published 2025-09-15 Partial fix · 4.14.326, 4.19.295 +7 CWE-191
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() The function needs to check the minimal filehandle length before it can access the embedded fi…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00206 Published 2025-09-07 Partial fix · 5.4.297, 5.10.241 +7
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: sctp: linearize cloned gso packets in sctp_rcv A cloned head skb still shares these frag skbs in fraglist with the original head skb.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00171 Published 2025-09-04 Partial fix · 5.4.297, 5.10.241 +7 CWE-908
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix potential use-after-free when clear keys Similar to commit c5d2b6fa26b5 ("Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk"…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00154 Published 2025-09-18 Partial fix · 5.10.195, 5.15.132 +4 CWE-416
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: pstore/ram: Check start of empty przs during init After commit 30696378f68a ("pstore/ram: Do not treat empty buffers as valid"), initialization would as…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00161 Published 2025-09-16 Partial fix · 4.14.326, 4.19.295 +11 CWE-787
TI-2023-29549 CVE-2023-53257 · GHSA-5qfv-wj98-fqxv

wifi: mac80211: check S1G action frame size

Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: check S1G action frame size Before checking the action code, check that it even exists in the frame.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00214 Published 2025-09-15 Partial fix · 5.15.133, 6.1.55 +2
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies() Fix a slab-out-of-bounds read that occurs in kmemdup() called from brcmf_get_assoc_ies(…

CVSS 3.1HIGH 8.1 Adjacent network No auth No interaction EPSS 0.00244 Published 2025-09-15 Partial fix · 4.14.315, 4.19.283 +7 CWE-125
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: fix use-after-free bug in brcmf_netdev_start_xmit() > ret = brcmf_proto_tx_queue_data(drvr, ifp->ifidx, skb); may be schedule, and then…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00164 Published 2025-09-18 Partial fix · 4.14.296, 4.19.262 +6 CWE-416
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: iomap: iomap: fix memory corruption when recording errors during writeback Every now and then I see this crash on arm64: Unable to handle kernel NULL po…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00168 Published 2025-09-18 Partial fix · 5.10.271, 5.15.222 +3 CWE-787
TI-2022-25849 CVE-2022-50367 · GHSA-4hcm-79j9-x472

fs: fix UAF/GPF bug in nilfs_mdt_destroy

Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: fs: fix UAF/GPF bug in nilfs_mdt_destroy In alloc_inode, inode_init_always() could return -ENOMEM if security_inode_alloc() fails, which causes inode->i…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00225 Published 2025-09-17 Partial fix · 4.9.331, 4.14.296 +7 CWE-416
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: ipv6: mcast: Delay put pmc->idev in mld_del_delrec() pmc->idev is still used in ip6_mc_clear_src(), so as mld_clear_delrec() does, the reference should…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00173 Published 2025-08-16 Partial fix · 5.15.190, 6.1.147 +4
TI-2023-29783 CVE-2023-53494 · GHSA-3646-gh58-xhcx

crypto: xts - Handle EBUSY correctly

Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00164 Published 2025-10-01 Partial fix · 5.10.173, 5.15.99 +3 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: skbuff: skb_segment, Call zero copy functions before using skbuff frags Commit bf5c25d60861 ("skbuff: in skb_segment, call zerocopy functions once per n…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00205 Published 2025-09-17 Partial fix · 4.19.295, 5.4.257 +6 CWE-476
TI-2023-29473 CVE-2023-53178 · GHSA-hjrq-8p9v-7m4p

mm: fix zswap writeback race condition

Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: mm: fix zswap writeback race condition The zswap writeback mechanism can cause a race condition resulting in memory corruption, where a swapped out page…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00121 Published 2025-09-15 Partial fix · 6.1.30, 6.3.4 +1 CWE-362
Priority LOW 31

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface() There may be a bad USB audio device with a USB ID of (0x04fa, 0x4201) and…

CVSS 3.1HIGH 7.1 Local Low privileges No interaction EPSS 0.00236 Published 2024-05-03 Partial fix · 4.9.328, 4.14.293 +6 CWE-125
Priority LOW 30

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7921: fix kernel panic by accessing unallocated eeprom.data The MT7921 driver no longer uses eeprom.data, but the relevant code has not been rem…

CVSS 3.1HIGH 7.1 Local Low privileges No interaction EPSS 0.00163 Published 2025-09-15 Partial fix · 6.1.28, 6.2.15 +2
Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes A bad USB device is able to construct a service connection response message with target endpo…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00163 Published 2025-09-15 Partial fix · 4.14.322, 4.19.291 +7
Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: net: sched: sfb: fix null pointer access issue when sfb_init() fails When the default qdisc is sfb, if the qdisc of dev_queue fails to be inited during…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00208 Published 2025-09-17 Partial fix · 5.10.152, 5.15.76 +2 CWE-476
Priority LOW 21

In the Linux kernel, the following vulnerability has been resolved: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() KCSAN found an issue in obj_stock_flush_required(): stock->cached_objcg can be re…

CVSS 3.1MEDIUM 4.7 Local Low privileges No interaction EPSS 0.00139 Published 2025-09-18 Partial fix · 6.1.45, 6.4.10 +1 CWE-476