CVE-2026-43128

Advisory lineage Upstream: 0 Downstream: 17
Analyzed
Published: 06 May 2026, 11:27
Last modified:11 May 2026, 22:18

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.14% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 May 2026, 11:27
Published
Vulnerability first disclosed
11 May 2026, 22:18
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Fix double dma_buf_unpin in failure path In ib_umem_dmabuf_get_pinned_with_dma_device(), the call to ib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf is immediately unpinned but the umem_dmabuf->pinned flag is still set. Then, when ib_umem_release() is called, it calls ib_umem_dmabuf_revoke() which will call dma_buf_unpin() again. Fix this by removing the immediate unpin upon failure and just let the ib_umem_release/revoke path handle it. This also ensures the proper unmap-unpin unwind ordering if the dmabuf_map_pages call happened to fail due to dma_resv_wait_timeout (and therefore has a non-NULL umem_dmabuf->sgt).

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.14%• Percentile: 4%

Techniques & Countermeasures

  • CWE-415•Double Free

    The product calls free() twice on the same memory address.

Affected Systems

  • linux•linux

    ≥ 1e4df4a21c5ac722df1099eee30cad9246c889b5, < 70542b69abff34d24b11ae0bb200cc7a766d18df | ≥ 1e4df4a21c5ac722df1099eee30cad9246c889b5, < b324327ff6f48d8065dca67eb3b91357e72726bd | ≥ 1e4df4a21c5ac722df1099eee30cad9246c889b5, < ba3bf0f1bf1d5d0404678485e872980532fcc2c4 | ≥ 1e4df4a21c5ac722df1099eee30cad9246c889b5, < d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf | ≥ 1e4df4a21c5ac722df1099eee30cad9246c889b5, < 40126bcbefa79ea86672e05dae608596bab38319 | ≥ 1e4df4a21c5ac722df1099eee30cad9246c889b5, < 104016eb671e19709721c1b0048dd912dc2e96be | 5.16

  • linux•linux kernel

    ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6 | 7.0:rc1

References (6)