Answer in brief
CVE-2026-52908 records a High severity (CVSS 7.8) vulnerability in RDMA: During rereg_mr ensure that REREG_ACCESS is compatible. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b40656aa7d559adc1fe689396dc58b92a9a27286 <09dc18894148381d3bfc550083b1236043870dce || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <eba5df21eda0fe7418efbea2f799f8ea1b8ca94c || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <2904e985a2917b5dac65df82733065e78a65fc9d || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <50334a05a950840b39a1ce3d2a173b4183db9b3e || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <badad6fad60def1b9805559dd81dbab3d97b82aa | 09dc18894148381d3bfc550083b1236043870dce, eba5df21eda0fe7418efbea2f799f8ea1b8ca94c, 2904e985a2917b5dac65df82733065e78a65fc9d, 50334a05a950840b39a1ce3d2a173b4183db9b3e, badad6fad60def1b9805559dd81dbab3d97b82aa |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-52908 records a High severity (CVSS 7.8) vulnerability in RDMA: During rereg_mr ensure that REREG_ACCESS is compatible. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b40656aa7d559adc1fe689396dc58b92a9a27286 <09dc18894148381d3bfc550083b1236043870dce || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <eba5df21eda0fe7418efbea2f799f8ea1b8ca94c || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <2904e985a2917b5dac65df82733065e78a65fc9d || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <50334a05a950840b39a1ce3d2a173b4183db9b3e || >=b40656aa7d559adc1fe689396dc58b92a9a27286 <badad6fad60def1b9805559dd81dbab3d97b82aa | 09dc18894148381d3bfc550083b1236043870dce, eba5df21eda0fe7418efbea2f799f8ea1b8ca94c, 2904e985a2917b5dac65df82733065e78a65fc9d, 50334a05a950840b39a1ce3d2a173b4183db9b3e, badad6fad60def1b9805559dd81dbab3d97b82aa |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.
Quoted source text, attributed separately from HOL analysis.