Answer in brief
CVE-2026-43120 records a High severity (CVSS 7.8) vulnerability in RDMA/irdma: Fix double free related to rereg_user_mr. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=715fdb3b30541cc8180b7cdc6aa9f8c307afdf25 <62298a48f8b8788ad8b8464e6ffdf1ddebd2217e || >=5ac388db27c443dadfbb0b8b23fa7ccf429d901a <66964118f1f50ed85001c8fc9f7ab5bbdd021ee0 || >=5ac388db27c443dadfbb0b8b23fa7ccf429d901a <0f22c32141acdcda266b26cab2b830baf870f3e0 || >=5ac388db27c443dadfbb0b8b23fa7ccf429d901a <0c5d70bcb9d2275a1c8515a924016fcfeb4ab441 || >=5ac388db27c443dadfbb0b8b23fa7ccf429d901a <29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2 || >=6.6.120 <6.6.136 | 62298a48f8b8788ad8b8464e6ffdf1ddebd2217e, 66964118f1f50ed85001c8fc9f7ab5bbdd021ee0, 0f22c32141acdcda266b26cab2b830baf870f3e0, 0c5d70bcb9d2275a1c8515a924016fcfeb4ab441, 29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2, 6.6.136 |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix double free related to rereg_user_mr If IB_MR_REREG_TRANS is set during rereg_user_mr, the umem will be released and a new one will be allocated in irdma_rereg_mr_trans. If any step of irdma_rereg_mr_trans fails after the new umem is allocated, it releases the umem, but does not set iwmr->region to NULL. The problem is that this failure is propagated to the user, who will then call ibv_dereg_mr (as they should). Then, the dereg_mr path will see a non-NULL umem and attempt to call ib_umem_release again. Fix this by setting iwmr->region to NULL after ib_umem_release. Fixed: 5ac388db27c4 ("RDMA/irdma: Add support to re-register a memory region")
Quoted source text, attributed separately from HOL analysis.