Skip to main content
CVE-2026-45856VulnerabilityPublished Updated

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Affects Red Hat kernel security,Source GCVE Database

0

Mentioned vulnerabilities

Authoritative record:CVE-2026-45856· High 7.1

Not known to be exploited · CVSS 7.1 High · fixed in Red Hat package updates : patch Red Hat kernel security, soon.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in d533425ac1f2925b4fc3e4ed9b9d72362cb23475, bf4454da8b1e712714628c0a0d6e7845bb40790a, bf1feed1a7886af945f92890493aefd2b5c9928a +5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ c3bea3d2dc5358e05541527283279102383b0231, < d533425ac1f2925b4fc3e4ed9b9d72362cb23475
Fixed in
  • d533425ac1f2925b4fc3e4ed9b9d72362cb23475
LinuxLinuxAffected
  • ≥ c3bea3d2dc5358e05541527283279102383b0231, < bf4454da8b1e712714628c0a0d6e7845bb40790a
Fixed in
  • bf4454da8b1e712714628c0a0d6e7845bb40790a
LinuxLinuxAffected
  • ≥ c3bea3d2dc5358e05541527283279102383b0231, < bf1feed1a7886af945f92890493aefd2b5c9928a
Fixed in
  • bf1feed1a7886af945f92890493aefd2b5c9928a
LinuxLinuxAffected
  • ≥ c3bea3d2dc5358e05541527283279102383b0231, < bef70ff9841990658610512b4a18e4a88c9b4df6
Fixed in
  • bef70ff9841990658610512b4a18e4a88c9b4df6
LinuxLinuxAffected
  • ≥ c3bea3d2dc5358e05541527283279102383b0231, < 1956f0a74ccf5dc9c3ef717f2985c3ed3400aab0
Fixed in
  • 1956f0a74ccf5dc9c3ef717f2985c3ed3400aab0
LinuxLinuxAffected
  • ≥ c3bea3d2dc5358e05541527283279102383b0231, < 9c15ec4cd4e7f57c6bbcb4e73e99290f150dd2a7
Fixed in
  • 9c15ec4cd4e7f57c6bbcb4e73e99290f150dd2a7

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: netfilter: nf_conncount: increase the connection clean up limit to 64 (CVE-2026-45860) * kernel: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send (CVE-2026-45856) * kernel: Bluetooth: hci_uart: fix UAFs and race conditions in close and init paths (CVE-2026-46275) * kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972) * kernel: ipvs: clear the svc scheduler ptr early on edit (CVE-2026-53270) * kernel: Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del() (CVE-2026-53357) * kernel: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-63829) * kernel: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path (CVE-2026-63794) * kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (CVE-2026-63924) * kernel: ipv6: exthdrs: refresh nh after handling HAO option (CVE-2026-63922) * kernel: ipv6: validate extension header length before copying to cmsg (CVE-2026-63920) * kernel: tcp: fix stale per-CPU tcp_tw_isn leak enabling ISN prediction (CVE-2026-64024) * kernel: l2tp: use refcount_inc_not_zero in l2tp_session_get_by_ifname (CVE-2026-63918) * kernel: ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress() (CVE-2026-63984) * kernel: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() (CVE-2026-63992) * kernel: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() (CVE-2026-63994) * kernel: netfilter: x_tables: add and use xtables_unregister_table_exit (CVE-2026-64078) * kernel: ipv6: ioam: refresh hdr pointer before ioam6_event() (CVE-2026-64132) * kernel: Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb() (CVE-2026-64557) * kernel: vxlan: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-68432) * kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476) * kernel: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-72052) * kernel: netfilter: nft_lookup: fix catchall element handling with inverted lookups (CVE-2026-72320) * kernel: netfilter: nf_queue: pin bridge device while NFQUEUE holds fake dst (CVE-2026-72255) * kernel: KVM: SVM: Update x2APIC MSR intercepts if AVIC is inhibited while L2 is active (CVE-2026-74516) * kernel: packet: use consistent hard_header_len in non-ring send paths () * kernel: packet: use consistent hard_header_len in non-ring send paths (CVE-2026-74582) * kernel: ipvs: clear IPv4 options after rebasing tunnel ICMP errors (CVE-2026-74669) * kernel: netfilter: flowtable: publish GC-visible tuple last (CVE-2026-74746) * kernel: ipv6: fix use-after-free in ip6_finish_output2() (CVE-2026-80792) * kernel: futex: Fix race on the initial mm->futex.phash.ref allocation (CVE-2026-80775) * kernel: KVM: s390: vsie: zero stale crypto bits (CVE-2026-80921) * kernel: nvme: add missing SRCU grace period in error path (CVE-2026-89972) * kernel: nvme/ioctl: check SUBMIT_IO with nvme_cmd_allowed() (CVE-2026-90227) * kernel: netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack() (CVE-2026-97417) * kernel: netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state (CVE-2026-93288) Bug Fix(es) and Enhancement(s): * wifi card breaks using FIPS (JIRA:RHEL-257457) * RHEL10.0 - kernel: CPU hotplug unsupported by CPUMF [rhel-10.2.z] (JIRA:RHEL-270888) 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.

References

Community reviews

Loading reviews…