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Red Hat Security Advisory

RHSA-2026:91565

kernel security, bug fix, and enhancement update

Released 2026-10-28 · Red Hat rating Important · View on Red Hat →

Fixed in

Fixes 16 records

Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE core_scsi3_emulate_pro_register_and_move() maps the PERSISTENT RESERVE OUT parame…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00724 Published 2026-08-15 Partial fix · 3.3, 5.10.261 +7 CWE-416
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: net: gro: fix double aggregation of flush-marked skbs Commit 0ab03f353d36 ("net-gro: Fix GRO flush when receiving a GSO packet.") added a flush check to…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00539 Published 2026-08-10 Partial fix · 5.10.266, 6.1.184 +5 CWE-476
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: net/handshake: hand off the pinned file reference to accept_doit handshake_req_next() removes the request from the per-net pending list and drops hn_loc…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00635 Published 2026-07-19 Fixed in 6.6.160, 6.12.114 +3 CWE-416
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: net/handshake: Take a long-lived file reference at submit handshake_nl_accept_doit() needs the file pointer backing req->hr_sk->sk_socket to survive the…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.0045 Published 2026-07-25 Partial fix · 6.6.160, 6.12.93 +3 CWE-416
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: net/handshake: Drain pending requests at net namespace exit The arguments to list_splice_init() in handshake_net_exit() are reversed.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.0049 Published 2026-07-19 Fixed in 6.6.160, 6.12.93 +3 CWE-362
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled The MPCIFC instruction doesn't allow registering adapter interrupts without first…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00129 Published 2026-08-15 Partial fix · 6.1.183, 6.6.151 +4
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix UAF read of tail->len in unix_stream_data_wait() unix_stream_data_wait() does skb_peek_tail(&sk->sk_receive_queue) without holding any lock…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00129 Published 2026-07-19 Partial fix · 6.6.143, 6.12.92 +3 CWE-416
Priority LOW 37

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: clear vdev->msi_perm after freeing it on init failure vfio_msi_cap_len() lazily allocates the per-device MSI permission table: vdev->msi_perm…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00164 Published 2026-09-16 Partial fix · 4.5, 4.10 +10
Priority LOW 37

In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover…

CVSS 3.1HIGH 8.4 Local No auth No interaction EPSS 0.00138 Published 2026-08-22 Partial fix · 5.10.266, 5.15.217 +6
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions When a file has the setuid or setgid bit set and is written to,…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00178 Published 2026-09-11 Partial fix · 5.10.273, 5.15.224 +6
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: net/packet: avoid fanout hook re-registration after unregister packet_set_ring() temporarily detaches a socket from packet delivery while reconfiguring…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00136 Published 2026-08-10 Partial fix · 5.10.265, 5.15.216 +6 CWE-362
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: net: shaper: rework the VALID marking (again) Recent commit changed the semantics from NOT_VALID to VALID.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00099 Published 2026-07-19 Partial fix · 6.18.34, 7.0.11 +1 CWE-362
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before replacing page cache folio fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00133 Published 2026-07-19 Partial fix · 5.15.211, 6.1.177 +6 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: md/raid5-ppl: fix use-after-free in ppl_do_flush() The loop in ppl_do_flush() continues iterating after calling ppl_io_unit_finished(), touching io->pen…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00153 Published 2026-09-24 Partial fix · 5.10.270, 5.15.221 +6
TI-2026-38322 CVE-2026-53236 · GHSA-jmmv-2hp7-p7g5

tcp: restrict SO_ATTACH_FILTER to priv users

Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: tcp: restrict SO_ATTACH_FILTER to priv users This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets to users with CAP_NET_ADMIN capabili…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00125 Published 2026-06-25 Partial fix · 6.1.176, 6.6.143 +4
Priority LOW 22

In the Linux kernel, the following vulnerability has been resolved: usb: usbfs: fix use-after-free of usb_device in usbdev_release() usbdev_release() drops its reference to the struct usb_device before draining the list…

CVSS — EPSS 0.00195 Published 2026-09-04 Partial fix · 5.10.269, 5.15.220 +7