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CVE-2026-97613

Linux: net: mana: Reserve extra CQ slot for the fence completion CQE

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in62eb52454afcc1d390b8624c5d1ddc92cf382f39Also 1e43c407624d2111c19d4d8ffe9b2191a0ec42de, 6c739cb89ebd6cf225dac46d2721e11927a7ead4 and 1 moreCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 62eb52454afcc1d390b8624c5d1ddc92cf382f39LinuxCVE List
  • 1e43c407624d2111c19d4d8ffe9b2191a0ec42deLinuxCVE List
  • 6c739cb89ebd6cf225dac46d2721e11927a7ead4LinuxCVE List
  • 80dd7e754b3aa9637a0758ad93fa209f9650ec48LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

In the Linux kernel, the following vulnerability has been resolved:

net: mana: Reserve extra CQ slot for the fence completion CQE

The RX completion queue is sized to hold exactly one CQE per posted RX WQE. MANA_FENCE_RQ makes hardware post an additional CQE_RX_OBJECT_FENCE after the packet CQEs. The current sizing reserves no extra slot for it and in rare cases, CQ has no guaranteed slot for the fence CQE when it is full of packet CQEs. This can lead to dropping the fence completion while the driver waits holding RTNL lock throughout the timeout duration. Reserve one extra CQE slot for CQE_RX_OBJECT_FENCE. mana_gd_alloc_memory() requires queue_size to be a power-of-two and at least MANA_PAGE_SIZE; the reservation pushes cq_size past a power-of-two, so round up the CQ size in mana_create_rxq().

Text from CVE List

Affected versions 12

  • Linuxaffected: 6cc74443a7732d7e93bee3d0c3704a22cc7274d9 before f7d76b84b9206eef4320d8ab715d65f944535acfCVE List
  • Linuxaffected: 6cc74443a7732d7e93bee3d0c3704a22cc7274d9 before 62eb52454afcc1d390b8624c5d1ddc92cf382f39CVE List
  • Linuxaffected: 6cc74443a7732d7e93bee3d0c3704a22cc7274d9 before 1e43c407624d2111c19d4d8ffe9b2191a0ec42deCVE List
  • Linuxaffected: 6cc74443a7732d7e93bee3d0c3704a22cc7274d9 before 6c739cb89ebd6cf225dac46d2721e11927a7ead4CVE List
  • Linuxaffected: 6cc74443a7732d7e93bee3d0c3704a22cc7274d9 before 80dd7e754b3aa9637a0758ad93fa209f9650ec48CVE List
  • Linuxaffected: 5.17CVE List
  • Linuxunaffected: all versions before 5.17CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.7 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5