Critical severity · published Jul 19, 2026
CVE-2026-64018
net: mana: validate rx_req_idx to prevent out-of-bounds array access
9.3
CVSS
0.1%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory. In Confidential VMs (SEV-SNP/TDX), this memory is shared unencrypted and HW can modify WQE contents at any time. No bounds check exists on rx_req_idx, which can lead to an out-of-bounds access into reqs[]. Add bounds check on rx_req_idx in mana_hwc_rx_event_handler() before using it to index the reqs[] array.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.13 before 5.15.209; 5.16 before 6.1.175; 6.2 before 6.6.142; 6.7 before 6.12.92; 6.13 before 6.18.34; 6.19 before 7.0.11; +4 more · source: NVD
LI
Linux · Linux
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 5ddc715324badd7f2641bc177db1d027b402adae; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before ff1d5af207bcea857d45fe81505f1bc4b29eaef0; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 763a372d344fb12fae566d36ddb46e92454ad58c; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before fa627a5eaa83fc0261f44ef3769693b886ca6e27; ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 355e9f2b2a7887ca38100127989af3e422ba71d0; +2 more · source: vendor