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Description

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().

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-05-27 | Assigner Linux

Product status

Default status
unaffected

7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 (git) before baa42b756d183a59572f3890981a3d32b8d05d40
affected

7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 (git) before 51b7181cfbedf289ce794b6d97a1c596c309ec38
affected

7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 (git) before e19cce88ec4c4877f4ff2469099b9cf23cc3e93e
affected

7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 (git) before a1f4dc72efc3204db95d052058d785cad7ce755f
affected

7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 (git) before 6220694c52a5a04102b48109e4f24e958b559bd3
affected

Default status
affected

6.2
affected

Any version before 6.2
unaffected

6.6.128 (semver)
unaffected

6.12.75 (semver)
unaffected

6.18.14 (semver)
unaffected

6.19.4 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/baa42b756d183a59572f3890981a3d32b8d05d40

git.kernel.org/...c/51b7181cfbedf289ce794b6d97a1c596c309ec38

git.kernel.org/...c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e

git.kernel.org/...c/a1f4dc72efc3204db95d052058d785cad7ce755f

git.kernel.org/...c/6220694c52a5a04102b48109e4f24e958b559bd3

cve.org (CVE-2026-45880)

nvd.nist.gov (CVE-2026-45880)

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