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Red Hat Security Advisory

RHSA-2026:63129

kernel security, bug fix, and enhancement update

Released 2026-09-04 · Red Hat rating Important · View on Red Hat →

Fixed in

Fixes 27 records

Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: reject short AUTH_RECEIVE buffers nvmet_execute_auth_receive() trusts the AUTH_RECEIVE allocation length after checking only that it is nonz…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00803 Published 2026-08-15 Partial fix · 6.1.191, 6.6.160 +4
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() rt_spin_unlock() releases the RCU protection before unlocking the lock.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00728 Published 2026-08-15 Partial fix · 5.15.217, 6.1.184 +5 CWE-416
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: bound Read Response placement to the RREAD length In drivers/infiniband/sw/siw/siw_qp_rx.c, siw_proc_rresp() places each inbound Read Response…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00714 Published 2026-07-25 Partial fix · 5.10.261, 5.15.212 +6 CWE-787
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf iscsi_encode_text_output() concatenates "key=value\0" records into login->rsp_b…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00778 Published 2026-07-19 Partial fix · 5.10.259, 5.15.210 +6 CWE-122
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Validate CHAP_R length before base64 decode chap_server_compute_hash() allocates client_digest as kzalloc(chap->digest_size) and th…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00711 Published 2026-07-19 Partial fix · 6.1.176, 6.6.143 +4 CWE-122
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00644 Published 2026-07-19 Partial fix · 5.10.260, 5.5 +7 CWE-416
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: nfsd: release layout stid on setlease failure nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via idr_alloc_cyclic() under cl_lock before…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00663 Published 2026-07-19 Partial fix · 5.10.261, 5.15.212 +6 CWE-416
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00457 Published 2026-07-25 Fixed in 6.6.145, 6.12.96 +3 CWE-415
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfat_find_dir_entry() In exfat_find_dir_entry(), the buffer_head obtained from exfat_get_dentry() is released wi…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00527 Published 2026-07-19 Partial fix · 5.10.260, 5.15.211 +6 CWE-416
Priority MEDIUM 46

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in symlink_data() Since smb2_check_message() returns success without length validation for the symlink error response…

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.00525 Published 2026-05-28 Fixed in 6.1, 6.1.175 +5 CWE-125
Priority MEDIUM 41

In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-cohe…

CVSS 3.1CRITICAL 9.3 Local No auth No interaction EPSS 0.00142 Published 2026-07-19 Partial fix · 5.15.209, 6.1.175 +5 CWE-125
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() The VF2PF interrupt handler queues PF-side response work that stores a raw pointer to…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00135 Published 2026-07-25 Partial fix · 5.10.261, 5.15.212 +6 CWE-416
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix posix_acl leak on SETACL decode failure nfsaclsvc_decode_setaclargs() and nfs3svc_decode_setaclargs() each call nfs_stream_decode_acl() twice,…

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00529 Published 2026-07-19 Partial fix · 5.10.260, 5.15.211 +6 CWE-401
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: NFSv4/flexfiles: reject zero filehandle version count ff_layout_alloc_lseg() decodes the filehandle-version array count from the flexfiles layout body.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00529 Published 2026-07-19 Partial fix · 5.10.261, 5.15.212 +6 CWE-20
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr nfs4_decode_mp_ds_addr() decodes the r_netid and r_addr opaques of a netaddr4 from a GET…

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00517 Published 2026-07-19 Partial fix · 5.15.211, 6.1.177 +5 CWE-476
Priority LOW 38

In the Linux kernel, the following vulnerability has been resolved: ALSA: virtio: Validate control metadata from the device virtio-snd control handling trusts the device-provided control type and value count returned by…

CVSS 3.1HIGH 8.4 Local No auth No interaction EPSS 0.00193 Published 2026-07-25 Fixed in 6.12.96, 6.18.39 +2 CWE-125
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: iomap: fix out-of-bounds bitmap_set() with zero-length range ifs_set_range_dirty() and ifs_set_range_uptodate() compute last_blk as (off + len - 1) >> i…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00138 Published 2026-08-10 Fixed in 6.6.153, 6.12.101 +3 CWE-190
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - validate RSA CRT component lengths The generic RSA key parser (rsa_helper.c) bounds each CRT component (p, q, dp, dq, qinv) by the modulus…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00169 Published 2026-07-25 Partial fix · 5.10.261, 5.15.212 +6 CWE-787
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() ipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.0013 Published 2026-07-19 Partial fix · 5.10.259, 5.15.210 +6 CWE-416
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: KEYS: fix overflow in keyctl_pkey_params_get_2() The length for the internal output buffer is calculated incorrectly, which can result overflow when a t…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00169 Published 2026-07-19 Partial fix · 5.10.260, 5.15.211 +6 CWE-787
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: bonding: alb: fix UAF in rlb_arp_recv during bond up/down The ALB RX path may access rx_hashtbl concurrently with bond teardown.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00126 Published 2026-05-27 Partial fix · 5.10.252, 5.15.202 +6 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: smc: Fix use-after-free in __pnet_find_base_ndev().

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.0015 Published 2025-10-28 Partial fix · 6.1.187, 6.6.156 +3
Priority LOW 30

In the Linux kernel, the following vulnerability has been resolved: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC POSIX requires write permission to truncate a file, so an open() that specifies O_TRUNC mus…

CVSS 3.1HIGH 7.1 Local Low privileges No interaction EPSS 0.00147 Published 2026-07-25 Partial fix · 5.10.261, 5.15.212 +6 CWE-862
Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared bef…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00114 Published 2026-06-24 Partial fix · 5.10.258, 5.15.209 +9 CWE-476
Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: Fix a memory leak in tpm2_load_cmd 'tpm2_load_cmd' allocates a tempoary blob indirectly via 'tpm2_key_decode' but it is not freed in the…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00142 Published 2026-01-23 Partial fix · 5.15.198, 6.1.160 +4 CWE-401
Priority LOW 22

In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Make Safe-RET robust against interrupt injection An attacker injecting interrupts while the Safe-RET mitigation executes on machines affected…

CVSS — EPSS 0.00234 Published 2026-08-06 Partial fix · 5.10.264, 5.15.215 +7
Priority LOW 22

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs.

CVSS — EPSS 0.00206 Published 2026-08-10 Fixed in 6.6.153, 6.12.105 +3