# RHSA-2026:15883: kernel security update

RHSA-2026:15883, released March 12, 2026, fixes 6 CVEs in kernel (version 6.12.0-55.72.1.el10_0). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-15883
- Platform: Linux
- Released: Mar 12, 2026
- Priority: Urgent (Closes CVE-2026-31402, rated Critical)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:15883

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-55.72.1.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-31402](https://patchblox.com/security/data/cve/CVE-2026-31402.md) | Urgent | kernel-default: The SUSE Linux Enterprise 15 SP6 kernel was updated to fix various security issues  The following security issues wer... | 9.8 | 0.0122 |  |
| [CVE-2026-23139](https://patchblox.com/security/data/cve/CVE-2026-23139.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: nf_conncount: update last_gc only whe... | 7.6 | 0.0038 |  |
| [CVE-2026-23401](https://patchblox.com/security/data/cve/CVE-2026-23401.md) | High | KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE | 8.8 | 0.0019 |  |
| [CVE-2026-23243](https://patchblox.com/security/data/cve/CVE-2026-23243.md) | High | RDMA/umad: Reject negative data_len in ib_umad_write | 7.8 | 0.0018 |  |
| [CVE-2026-31532](https://patchblox.com/security/data/cve/CVE-2026-31532.md) | High | can: raw: fix ro->uniq use-after-free in raw_rcv() | 8.8 | 0.0017 |  |
| [CVE-2026-23097](https://patchblox.com/security/data/cve/CVE-2026-23097.md) | High | kernel-core: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: L... | 7.5 | 0.0011 |  |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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