RHSA-2026:61887: Important: kernel security, bug fix, and enhancement update
Important: kernel security, bug fix, and enhancement update
Other sources
The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: seccomp: passthrough uretprobe systemcall without filtering (CVE-2025-21834) kernel: ip6tunnel: use skbvlaninetprepare() in ip6tnlrcv() (CVE-2026-23003) kernel: netfilter: nftables: Fix for duplicate device in netdev hooks (CVE-2026-43454) kernel: netfilter: nfnetlinkcthelper: fix OOB read in nfnlcthelperdumptable() (CVE-2026-43450) kernel: bonding: alb: fix UAF in rlbarprecv during bond up/down (CVE-2026-45970) kernel: ip6gre: Use cached t->net in ip6erspanchangelink() (CVE-2026-46120) kernel: iommu/amd: Fix clonealias() to use the original device's devid (CVE-2026-53053) kernel: NFSD: fix nfs4file access extra count in nfsd4addrdaccesstowrdeleg (CVE-2026-53026) kernel: zram: fix use-after-free in zrambvecwritepartial() (CVE-2026-53185) kernel: USB: serial: ioti: fix heap overflow in getmanufinfo() (CVE-2026-53196) kernel: mm/hugememory: update file PMD counter before folioput() (CVE-2026-53189) kernel: mm/listlru: drain before clearing xarray entry on reparent (CVE-2026-53153) kernel: pNFS: Fix use-after-free in pnfsupdatelayout() (CVE-2026-63800) kernel: nfsd: fix posixacl leak on SETACL decode failure (CVE-2026-53397) kernel: nfsd: release layout stid on setlease failure (CVE-2026-53399) kernel: NFSv4/flexfiles: reject zero filehandle version count (CVE-2026-53392) kernel: NFSv4/pNFS: reject zero-length raddr in nfs4decodempdsaddr (CVE-2026-53391) kernel: net: mana: validate rxreqidx to prevent out-of-bounds array access (CVE-2026-64018) kernel: smb: client: protect tccount increment in smb2findsmbsesstconunlocked() (CVE-2026-64136) kernel: netfilter: ipset: fix race between dump and ipsetlist resize (CVE-2026-64189) kernel: nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page (CVE-2026-64320) kernel: crypto: qat - fix VF2PF work teardown race in adfdisablesriov() (CVE-2026-64438) kernel: crypto: qat - validate RSA CRT component lengths (CVE-2026-64304) kernel: NFSv4: include MAYWRITE in open permission mask for OTRUNC (CVE-2026-64298) kernel: ALSA: virtio: Validate control metadata from the device (CVE-2026-64490) kernel: mm: shrinker: fix shrinkerinfo teardown race with expansion (CVE-2026-64418) kernel: smb: client: fix change notify replay double-free (CVE-2026-64384) kernel: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CVE-2026-64277) kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CVE-2026-64276) kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480) kernel: mm/khugepaged: write all dirty file folios when collapsing (CVE-2026-68086) kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation (CVE-2026-68166) kernel: locking/rt: Fix the incorrect RCU protection in rtspinunlock() (CVE-2026-72069) kernel: nvmet-auth: reject short AUTHRECEIVE buffers (CVE-2026-72130) Bug Fix(es) and Enhancement(s): RHEL 10: s390: Revert support for DCACHEWORDACCESS [rhel-10.2.z] (JIRA:RHEL-188180) qede: buildskb failure causes off-by-one BD ring corruption and kernel panic [rhel-10.2.z] (JIRA:RHEL-193043) ss core dumped when there is an SCTP session [rhel-10.2.z] (JIRA:RHEL-212393) [RHEL-10.2.z] Intel CWF: CPU is unable to obtain cstate1 on idle system (JIRA:RHEL-218627) RHEL10.0 - s390/pfault: Fix virtual vs physical address confusion [rhel-10.2.z] (JIRA:RHEL-222507) 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.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
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redhat/kernel-rt-modules-coreto a version that resolves this vulnerability.Fixed in 6.12.0-211.50.1.el10_2.aa - Upgrade
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Fixed in rhel-10.2.z - Operational
Reboot the system after applying the kernel security/bug fix update (system must be rebooted for the update to take effect).
Event History
Frequently Asked Questions
Which systems are in scope for this update?
The advisory applies to listed Red Hat Enterprise Linux offerings for x86_64, ARM 64, and IBM z Systems, including certain Extended Update Support, Extended Life Cycle, and 4-years-of-updates variants. It also lists Red Hat CodeReady Linux Builder for IBM z Systems.
Does the available information identify a specific vulnerability or exploitation prerequisite?
No. The provided data describes this as a kernel security, bug fix, and enhancement update, but does not identify individual vulnerabilities, attack vectors, prerequisites, or affected kernel package versions.
How can an administrator determine whether a system needs the update?
Compare the system's Red Hat product, architecture, and installed kernel packages against the package and version details in the RHSA-2026:61887 advisory. Those package-level details are not included in the provided data.