# RHSA-2026:91565: kernel security update

RHSA-2026:91565, released September 24, 2026, fixes 16 CVEs in kernel (version 6.12.0-211.69.1.el10_2). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-91565
- Platform: Linux
- Released: Sep 24, 2026
- Priority: Urgent (Closes CVE-2026-63979, rated Critical)
- CVEs: 16, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:91565

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-211.69.1.el10_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-63979](https://patchblox.com/security/data/cve/CVE-2026-63979.md) | Urgent | net/handshake: hand off the pinned file reference to accept_doit | 9.8 | 0.0064 |  |
| [CVE-2026-72083](https://patchblox.com/security/data/cve/CVE-2026-72083.md) | High | kernel-debug-modules-extra: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: s... | 9.8 | 0.0072 |  |
| [CVE-2026-68136](https://patchblox.com/security/data/cve/CVE-2026-68136.md) | High | net: gro: fix double aggregation of flush-marked skbs | 9.8 | 0.0054 |  |
| [CVE-2026-63978](https://patchblox.com/security/data/cve/CVE-2026-63978.md) | High | net/handshake: Drain pending requests at net namespace exit | 9.8 | 0.0049 |  |
| [CVE-2026-64523](https://patchblox.com/security/data/cve/CVE-2026-64523.md) | High | net/handshake: Take a long-lived file reference at submit | 9.8 | 0.0045 |  |
| [CVE-2026-80824](https://patchblox.com/security/data/cve/CVE-2026-80824.md) | High | usb: usbfs: fix use-after-free of usb_device in usbdev_release() | 8.8 | 0.0020 |  |
| [CVE-2026-89638](https://patchblox.com/security/data/cve/CVE-2026-89638.md) | High | smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions | 8.8 | 0.0018 |  |
| [CVE-2026-89777](https://patchblox.com/security/data/cve/CVE-2026-89777.md) | High | vfio/pci: clear vdev->msi_perm after freeing it on init failure | 8.8 | 0.0016 |  |
| [CVE-2026-93262](https://patchblox.com/security/data/cve/CVE-2026-93262.md) | High | md/raid5-ppl: fix use-after-free in ppl_do_flush() | 8.8 | 0.0015 |  |
| [CVE-2026-74631](https://patchblox.com/security/data/cve/CVE-2026-74631.md) | High | net: smc: fix splice entry lifetime imbalance in smc_rx_splice | 8.8 | 0.0014 |  |
| [CVE-2026-68338](https://patchblox.com/security/data/cve/CVE-2026-68338.md) | High | net/packet: avoid fanout hook re-registration after unregister | 8.8 | 0.0014 |  |
| [CVE-2026-53388](https://patchblox.com/security/data/cve/CVE-2026-53388.md) | High | fuse: re-lock request before replacing page cache folio | 8.8 | 0.0013 |  |
| [CVE-2026-64109](https://patchblox.com/security/data/cve/CVE-2026-64109.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved:  af_unix: Fix UAF read of tail->len in unix_strea... | 8.8 | 0.0013 |  |
| [CVE-2026-74515](https://patchblox.com/security/data/cve/CVE-2026-74515.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved:  KVM: s390: pci: Reject adapter interrupt forward... | 8.8 | 0.0013 |  |
| [CVE-2026-53236](https://patchblox.com/security/data/cve/CVE-2026-53236.md) | High | tcp: restrict SO_ATTACH_FILTER to priv users | 8.8 | 0.0013 |  |
| [CVE-2026-64027](https://patchblox.com/security/data/cve/CVE-2026-64027.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system | 8.8 | 0.0010 |  |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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