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Red Hat Security Advisory

RHSA-2026:21745

kernel-rt security update

Released 2026-05-28 · Red Hat rating Important · View on Red Hat →

Fixed in

Fixes 19 records

Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building DACL pointers parse_sec_desc(), build_sec_desc(), and the chown path in id_mode_to_cifs_acl() all add t…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00675 Published 2026-05-28 Partial fix · 5.15.210, 6.1.176 +5 CWE-190
Priority MEDIUM 48

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() In DecodeQ931(), the UserUserIE code path reads a 16-bit length from the packet, the…

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.01587 Published 2026-04-03 Partial fix · 5.10.253, 5.15.203 +6 CWE-125
Priority MEDIUM 47

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_eui64: reject invalid MAC header for all packets `eui64_mt6()` derives a modified EUI-64 from the Ethernet source address and compares i…

CVSS 3.1CRITICAL 9.4 Network No auth No interaction EPSS 0.00485 Published 2026-04-25 Partial fix · 5.10.258, 5.15.209 +6 CWE-125
Priority MEDIUM 42

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_tcpmss: check remaining length before reading optlen Quoting reporter: In net/netfilter/xt_tcpmss.c (lines 53-68), the TCP option parser r…

CVSS 3.1HIGH 8.2 Network No auth No interaction EPSS 0.00463 Published 2026-05-06 Partial fix · 5.10.252, 5.15.202 +6 CWE-125
Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: xfs: fix freemap adjustments when adding xattrs to leaf blocks xfs/592 and xfs/794 both trip this assertion in the leaf block freemap adjustment code af…

CVSS 3.1HIGH 8.8 Network Low privileges No interaction EPSS 0.00469 Published 2026-05-06 Partial fix · 5.10.252, 5.15.202 +6 CWE-664
Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate the whole DACL before rewriting it in cifsacl build_sec_desc() and id_mode_to_cifs_acl() derive a DACL pointer from a server-suppl…

CVSS 3.1HIGH 8.8 Network No auth User interaction EPSS 0.00345 Published 2026-05-01 Partial fix · 5.15.210, 6.1.176 +5 CWE-125
Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold sco_recv_frame() reads conn->sk under sco_conn_lock() but immediately re…

CVSS 3.1HIGH 8.8 Adjacent network No auth No interaction EPSS 0.00322 Published 2026-04-06 Partial fix · 5.10.265, 5.15.203 +6 CWE-416
Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: libceph: make decode_pool() more resilient against corrupted osdmaps If the osdmap is (maliciously) corrupted such that the encoded length of ceph_pg_po…

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.00458 Published 2026-01-14 Partial fix · 5.10.248, 5.15.198 +5 CWE-125
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq The wacom_intuos_bt_irq() function processes Bluetooth HID reports without sufficient bounds c…

CVSS 3.1HIGH 8.1 Adjacent network No auth No interaction EPSS 0.00256 Published 2026-05-01 Partial fix · 5.10.253, 5.15.203 +6 CWE-125
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: can: raw: fix ro->uniq use-after-free in raw_rcv() raw_release() unregisters raw CAN receive filters via can_rx_unregister(), but receiver deletion is d…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00165 Published 2026-04-23 Fixed in 5.10.258, 5.15.209 +7 CWE-416
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00137 Published 2026-03-18 Partial fix · 5.15.203, 6.1.167 +6 CWE-416
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: RDMA/umad: Reject negative data_len in ib_umad_write ib_umad_write computes data_len from user-controlled count and the MAD header sizes.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.0018 Published 2026-03-18 Partial fix · 5.10.252, 5.15.202 +6 CWE-190
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events The DSP event handling code in hwdep_read() could write more bytes to the user buf…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00175 Published 2025-12-24 Fixed in 6.1.160, 6.6.120 +4
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr Currently when both IMA and EVM are in fix mode, the IMA signature will be reset…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00154 Published 2025-12-16 Partial fix · 6.1.191, 6.6.117 +3
TI-2025-26653 CVE-2025-39981 · GHSA-rvm4-4vv7-vq58

Bluetooth: MGMT: Fix possible UAFs

Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix possible UAFs This attemps to fix possible UAFs caused by struct mgmt_pending being freed while still being processed like in the f…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00153 Published 2025-10-15 Partial fix · 6.6.140, 6.12.59 +2
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_helper: pass helper to expect cleanup nf_conntrack_helper_unregister() calls nf_ct_expect_iterate_destroy() to remove expectatio…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00131 Published 2026-05-01 Partial fix · 5.10.253, 5.15.203 +6 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate LTK enc_size on load Load Long Term Keys stores the user-provided enc_size and later uses it to size fixed-size stack operatio…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00129 Published 2026-05-01 Partial fix · 5.10.253, 5.15.203 +6 CWE-787
Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: net: sched: act_csum: validate nested VLAN headers tcf_csum_act() walks nested VLAN headers directly from skb->data when an skb still carries in-payload…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00117 Published 2026-04-25 Partial fix · 4.20, 5.10.258 +7
Priority LOW 20

In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resize race A General Protection Fault occurs in write_page() during array resize: RIP: 0010:write_page+0x22b…

CVSS 3.1MEDIUM 4.7 Local Low privileges No interaction EPSS 0.00091 Published 2026-05-06 Partial fix · 5.10.252, 5.15.202 +6 CWE-362