CVE-2026-45880
PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails
In the Linux kernel, the following vulnerability has been resolved: PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails When vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap() doesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired after gen_pool_alloc_owner(), and memunmap_pages() will hang forever when trying to remove the PCI device. Fix it by adding the missed percpu_ref_put().
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8; < baa42b756d183a59572f3890981a3d32b8d05d40 (affected, git) ≥ 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8; < 51b7181cfbedf289ce794b6d97a1c596c309ec38 (affected, git) ≥ 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8; < e19cce88ec4c4877f4ff2469099b9cf23cc3e93e (affected, git) ≥ 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8; < a1f4dc72efc3204db95d052058d785cad7ce755f (affected, git) ≥ 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8; < 6220694c52a5a04102b48109e4f24e958b559bd3 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
6.2 (affected) ≥ 0; < 6.2 (unaffected, semver) ≥ 6.6.128; ≤ 6.6.* (unaffected, semver) ≥ 6.12.75; ≤ 6.12.* (unaffected, semver) ≥ 6.18.14; ≤ 6.18.* (unaffected, semver) ≥ 6.19.4; ≤ 6.19.* (unaffected, semver) ≥ 7.0; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40CNA: Linux
- https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38CNA: Linux
- https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93eCNA: Linux
- https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755fCNA: Linux
- https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3CNA: Linux
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