# CVE-2026-80651: linux: In the Linux kernel, the following vulnerability has been resolved:  crypto: ccp/sev-dev-tsm - bail out early when pd...

CVE-2026-80651 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80651 (version 7.1.5-1), released August 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-80651
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 28, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  crypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL  dsm_create() initially checks pdev->bus when computing segment_id:  	u8 segment_id = pdev->bus ? pci_domain_nr(pdev->bus) : 0;  But the next two lines unconditionally dereference pdev->bus via pcie_find_root_port() and especially pci_dev_id(pdev), which expands to PCI_DEVID(dev->bus->number, dev->devfn). If pdev->bus is in fact NULL, segment_id is initialised to 0 but the very next statement crashes the kernel.  smatch flags this:    drivers/crypto/ccp/sev-dev-tsm.c:253 dsm_create() error: we     previously assumed 'pdev->bus' could be null (see line 251)  Make the NULL handling consistent: if pdev->bus is NULL the device has no PCI context to work with and SEV TIO setup cannot proceed, so return -ENODEV before any of the bus-dependent lookups. The remaining initialisation now runs only on the path where pdev->bus is known to be valid.  No change for callers where pdev->bus is non-NULL, which is the only case where dsm_create() did meaningful work before this change.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-80651](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80651.md) | Aug 29, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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