Summary
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: openvswitch: defer tunnel netdev_put to RCU release (CVE-2026-31678)
* kernel: xfrm: espintcp: do not reuse an in-progress partial send (CVE-2026-52935)
* kernel: USB: serial: mxuport: fix memory corruption with small endpoint (CVE-2026-63899)
* kernel: bridge: mcast: Fix a possible use-after-free when removing a bridge port (CVE-2026-64032)
* kernel: tcp: fix stale per-CPU tcp_tw_isn leak enabling ISN prediction (CVE-2026-64024)
* kernel: usb: typec: tcpm: bound altmode_desc[] per iteration in svdm_consume_modes() (CVE-2026-63962)
* kernel: Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close (CVE-2026-63974)
* kernel: ipv4: raw: reject IP_HDRINCL packets with ihl < 5 (CVE-2026-64114)
* kernel: ipv4: fib: free fib_alias with kfree_rcu() on insert error path (CVE-2026-64572)
* kernel: Bluetooth: hci_sync: Fix advertising data UAFs (CVE-2026-74509)
* kernel: Linux kernel: Denial of Service due to incorrect GSO state handling in network fragment reassembly (CVE-2026-80590)
* kernel: smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2() (CVE-2026-89633)
* kernel: perf: Fix addr_filter_ranges lifetime (CVE-2026-93817)
* kernel: kernel: strparser: use-after-free via msg_timer_work rearm after strp_done() cancellation ()
* kernel: exec: Cleanup POSIX timers right after de_thread() (CVE-2026-98260)
* kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)
Bug Fix(es) and Enhancement(s):
* Batch: z-stream xfrm - rhel-9.8.z (NST-Core-26W38) (JIRA:Rocky Linux-256697)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 9 | kernel | 0:5.14.0-687.59.1.el9_8 |
Vulnerabilities 15
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Critical 9.8CVE-2026-89633 Public exploit
smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2()
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2() coalesce_t2() computes data pointers directly from server-supplied DataOffset fields with no validation against bu…
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Critical 9.4
tcp: fix stale per-CPU tcp_tw_isn leak enabling ISN prediction
In the Linux kernel, the following vulnerability has been resolved: tcp: fix stale per-CPU tcp_tw_isn leak enabling ISN prediction Blamed commit moved the TIME_WAIT-derived ISN from the skb control block to a per-CPU variable, assuming the value would always …
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Critical 9.3CVE-2026-99999 Public exploit
ipv4: validate checksum_start before completing checksum
In the Linux kernel, the following vulnerability has been resolved: ipv4: validate checksum_start before completing checksum If a packet with bad checksum metadata gets into the ipv4 stack, skb_checksum_help can corrupt the network header and cause a bunch of…
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High 8.8
Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close Since hci_dev_close_sync() can now be called during the reset path, we should also set HCI_CMD_DRAIN_WORKQUEUE. This avoid…
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High 8.8
Bluetooth: hci_sync: Fix advertising data UAFs
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix advertising data UAFs hci_find_adv_instance() returns an adv_info pointer that is valid only while hdev->lock is held. The advertising command-sync paths perform inst…
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High 8.6
inet: frags: strip GSO state from fragments before reassembly
In the Linux kernel, the following vulnerability has been resolved: inet: frags: strip GSO state from fragments before reassembly A virtio_net_hdr (tun/tap, or AF_PACKET with PACKET_VNET_HDR) can mark an IPv4 or IPv6 fragment as GSO; nothing relates gso_type …
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High 7.8
openvswitch: defer tunnel netdev_put to RCU release
In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race …
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High 7.8
xfrm: espintcp: do not reuse an in-progress partial send
In the Linux kernel, the following vulnerability has been resolved: xfrm: espintcp: do not reuse an in-progress partial send espintcp keeps a single in-flight transmit in ctx->partial. Before building a new sk_msg, espintcp_sendmsg() first tries to flush that…
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High 7.8
bridge: mcast: Fix a possible use-after-free when removing a bridge port
In the Linux kernel, the following vulnerability has been resolved: bridge: mcast: Fix a possible use-after-free when removing a bridge port When per-VLAN multicast snooping is enabled, the bridge iterates over all the bridge ports, disables the per-port mult…
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High 7.8
ipv4: raw: reject IP_HDRINCL packets with ihl < 5
In the Linux kernel, the following vulnerability has been resolved: ipv4: raw: reject IP_HDRINCL packets with ihl < 5 raw_send_hdrinc() validates that the caller-supplied IPv4 header fits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (ip…
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High 7.8
perf: Fix addr_filter_ranges lifetime
In the Linux kernel, the following vulnerability has been resolved: perf: Fix addr_filter_ranges lifetime Lee Jia Jie reported that since event::addr_filter_ranges is used under RCU, it should be RCU freed.
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High 7.8CVE-2026-98260 Public exploit
exec: Cleanup POSIX timers right after de_thread()
In the Linux kernel, the following vulnerability has been resolved: exec: Cleanup POSIX timers right after de_thread() A per-thread CPU timer holds a reference to the PID of the thread it is attached to and, while it is armed, its node is queued in that threa…
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Unscored —
USB: serial: mxuport: fix memory corruption with small endpoint
In the Linux kernel, the following vulnerability has been resolved: USB: serial: mxuport: fix memory corruption with small endpoint Make sure that the bulk-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption should a …
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Unscored —
usb: typec: tcpm: bound altmode_desc[] per iteration in svdm_consume_modes()
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: bound altmode_desc[] per iteration in svdm_consume_modes() svdm_consume_modes() checks pmdata->altmodes against the array size once before the loop over the count, but forgo…
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Unscored —
ipv4: fib: free fib_alias with kfree_rcu() on insert error path
In the Linux kernel, the following vulnerability has been resolved: ipv4: fib: free fib_alias with kfree_rcu() on insert error path fib_table_insert() publishes new_fa into the leaf's fa_list with fib_insert_alias() before calling the fib entry notifiers. Whe…
References
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2461761
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2492098
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502325
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502332
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502333
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502356
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502462
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502486
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2511413
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2516967
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2525413
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2532230
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2540391
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2546491
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2553429
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advisory
https://access.redhat.com/errata/RHSA-2026:86033