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Red Hat Security Advisory

RHSA-2026:64775

kernel security, bug fix, and enhancement update

Released 2026-09-08 · Red Hat rating Important · View on Red Hat →

Fixed in

Fixes 22 records

Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: ipv6: sit: reload inner IPv6 header after GSO offloads ipip6_tunnel_xmit() caches the inner IPv6 header pointer at function entry and continues using it…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00576 Published 2026-06-25 Partial fix · 5.10.259, 5.15.210 +6 CWE-416
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_close() replay 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 0.00359 Published 2026-08-06 Partial fix · 6.6.145, 6.12.96 +3 CWE-415
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() skb_tunnel_check_pmtu() can change skb->head.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00514 Published 2026-07-19 Partial fix · 5.10.259, 5.15.210 +6 CWE-416
Priority MEDIUM 46

In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: validate reply message payload bounds against transfer length nvmet_auth_reply() accesses the variable-length rval[] array using attacker-co…

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.00563 Published 2026-07-25 Partial fix · 6.1.191, 6.6.145 +4 CWE-125
Priority MEDIUM 46

In the Linux kernel, the following vulnerability has been resolved: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dan…

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.00465 Published 2026-06-03 Partial fix · 6.1.187, 6.6.128 +4 CWE-20
Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when ini…

CVSS 3.1HIGH 8.8 Adjacent network No auth No interaction EPSS 0.00262 Published 2026-06-25 Partial fix · 5.10.269, 5.15.210 +6 CWE-416
Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls /dev/ppp open is currently authorized against file->f_cred->user_ns, while unattached a…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00273 Published 2026-06-24 Partial fix · 5.10.258, 5.15.209 +6 CWE-863
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: flow_dissector: do not dissect PPPoE PFC frames RFC 2516 Section 7 states that Protocol Field Compression (PFC) is NOT RECOMMENDED for PPPoE.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00449 Published 2026-06-08 Partial fix · 6.1.175, 6.6.140 +4 CWE-198
Priority LOW 37

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Bound used_lrs when flushing the pKVM hyp vCPU flush_hyp_vcpu() copies the host vGIC state into the hyp's private vCPU on every run.

CVSS 3.1HIGH 8.2 Local High privileges No interaction EPSS 0.00176 Published 2026-07-25 Partial fix · 6.6.145, 6.12.97 +3 CWE-125
Priority LOW 37

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation walk_s1() and kvm_walk_nested_s2() expect to be called while hol…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00107 Published 2026-06-25 Fixed in 6.12.114, 6.18.36 +2 CWE-662
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: rhashtable: clear stale iter->p on table restart rhashtable_walk_start_check() has two restart paths when resuming a walk.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00167 Published 2026-08-04 Partial fix · 5.10.265, 5.15.216 +6 CWE-416
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: io_uring/poll: fix signed comparison in io_poll_get_ownership() io_poll_get_ownership() uses a signed comparison to check whether poll_refs has reached…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00148 Published 2026-06-24 Fixed in 5.16, 6.1 +6 CWE-190
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: tcp: call sk_data_ready() after listener migration When inet_csk_listen_stop() migrates an established child socket from a closing listener to another s…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00135 Published 2026-05-27 Partial fix · 5.15.209, 6.1.175 +5 CWE-408
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent possible UaF in addrconf_permanent_addr() The mentioned helper try to warn the user about an exceptional condition, but the message is del…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00157 Published 2026-05-08 Partial fix · 5.10.253, 5.15.203 +6 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req When fuse_resend() moves a request from fpq->processing back to fiq->pending, it sets…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00172 Published 2026-07-25 Fixed in 6.12.96, 6.18.39 +2 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: ipv6: anycast: insert aca into global hash under idev->lock syzbot reported a splat [1]: a slab-use-after-free in ipv6_chk_acast_addr(), which walks the…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00115 Published 2026-06-25 Fixed in 6.18.36, 7.0.13 +1 CWE-416
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: net: add pskb_may_pull() to skb_gro_receive_list() skb_gro_receive_list() calls skb_pull(skb, skb_gro_offset(skb)) without first ensuring the data is in…

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00441 Published 2026-06-25 Fixed in 6.12.94, 6.18.36 +2
Priority LOW 32

In the Linux kernel, the following vulnerability has been resolved: can: bcm: add locking for bcm_op runtime updates The CAN broadcast manager (CAN BCM) can send a sequence of CAN frames via hrtimer.

CVSS 3.1HIGH 7.3 Local Low privileges No interaction EPSS 0.00276 Published 2025-06-08 Partial fix · 5.4.294, 5.10.238 +6 CWE-125
Priority LOW 30

In the Linux kernel, the following vulnerability has been resolved: net: guard timestamp cmsgs to real error queue skbs skb_is_err_queue() treats PACKET_OUTGOING as the sole marker for an skb from sk_error_queue.

CVSS 3.1HIGH 7.1 Local Low privileges No interaction EPSS 0.00136 Published 2026-06-25 Partial fix · 4.11, 5.10.259 +7 CWE-125
Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: udp: Fix wildcard bind conflict check when using hash2 When binding a udp_sock to a local address and port, UDP uses two hashes (udptable->hash and udpt…

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00125 Published 2026-04-22 Partial fix · 6.1.168, 6.6.131 +4
TI-2026-18877 CVE-2026-23442 · GHSA-prgg-rgfw-vr94

ipv6: add NULL checks for idev in SRv6 paths

Priority LOW 24

In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g.

CVSS 3.1MEDIUM 5.5 Local Low privileges No interaction EPSS 0.00134 Published 2026-04-03 Partial fix · 5.10.258, 5.15.209 +6 CWE-476