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TI-2026-31274 Aliases CVE-2026-43094GHSA-8c3v-5v6w-588p

ixgbevf: add missing negotiate_features op to Hyper-V ops table

Priority LOW 24CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

In the Linux kernel, the following vulnerability has been resolved: ixgbevf: add missing negotiate_features op to Hyper-V ops table Commit a7075f501bd3 ("ixgbevf: fix mailbox API compatibility by negotiating supported features") added the .negotiate_features callback to ixgbe_mac_operations and populated it in ixgbevf_mac_ops, but forgot to add it to ixgbevf_hv_mac_ops. This leaves the function pointer NULL on Hyper-V VMs. During probe, ixgbevf_negotiate_api() calls ixgbevf_set_features(), which unconditionally dereferences hw->mac.ops.negotiate_features(). On Hyper-V this results in a NULL pointer dereference: BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine [...] Workqueue: events work_for_cpu_fn RIP: 0010:0x0 [...] Call Trace: ixgbevf_negotiate_api+0x66/0x160 [ixgbevf] ixgbevf_sw_init+0xe4/0x1f0 [ixgbevf] ixgbevf_probe+0x20f/0x4a0 [ixgbevf] local_pci_probe+0x50/0xa0 work_for_cpu_fn+0x1a/0x30 [...] Add ixgbevf_hv_negotiate_features_vf() that returns -EOPNOTSUPP and wire it into ixgbevf_hv_mac_ops. The caller already handles -EOPNOTSUPP gracefully.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00123 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.175, 6.6.136, 6.12.83 +4Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.1.158 to before 6.1.175; 6.6.114 to before 6.6.136; 6.12.55 to before 6.12.83; 6.17.5 to before 6.186.1.175, 6.6.136, 6.12.83, 6.18Patch availableCNA
LinuxLinux6.18 and later6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0Patch availableCNA
  • Linux VendorLinux Affected 6.1.158 to before 6.1.175; 6.6.114 to before 6.6.136; 6.12.55 to before 6.12.83; 6.17.5 to before 6.18 Fixed in 6.1.175, 6.6.136, 6.12.83, 6.18 Patch available CNA
  • Linux VendorLinux Affected 6.18 and later Fixed in 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0 Patch available CNA

CPE configurations NVD · 15

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.1.158 to before 6.2; 6.6.114 to before 6.6.136; 6.12.55 to before 6.12.83; 6.17.5 to before 6.18; 6.18.1 to before 6.18.24; 6.19 to before 6.19.14VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.18:-:*:*:*:*:*:*6.18VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.18:rc2:*:*:*:*:*:*6.18 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.18:rc3:*:*:*:*:*:*6.18 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.18:rc4:*:*:*:*:*:*6.18 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.18:rc5:*:*:*:*:*:*6.18 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.18:rc6:*:*:*:*:*:*6.18 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.18:rc7:*:*:*:*:*:*6.18 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*7.0 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*7.0 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.1.158 to before 6.2; 6.6.114 to before 6.6.136; 6.12.55 to before 6.12.83; 6.17.5 to before 6.18; 6.18.1 to before 6.18.24; 6.19 to before 6.19.14 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.18:-:*:*:*:*:*:* Versions 6.18 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.18:rc2:*:*:*:*:*:* Versions 6.18 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.18:rc3:*:*:*:*:*:* Versions 6.18 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.18:rc4:*:*:*:*:*:* Versions 6.18 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.18:rc5:*:*:*:*:*:* Versions 6.18 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.18:rc6:*:*:*:*:*:* Versions 6.18 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.18:rc7:*:*:*:*:*:* Versions 6.18 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* Versions 7.0 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* Versions 7.0 rc2 Vulnerable ·Linux
Show 5 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*7.0 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*7.0 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*7.0 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*7.0 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*7.0 rc7VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* Versions 7.0 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* Versions 7.0 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* Versions 7.0 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* Versions 7.0 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* Versions 7.0 rc7 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.175, 6.6.136, 6.12.83, 6.18
  • Fix · CNA Linux (Linux) Fixed in 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-43094
  2. 2026-10-03 Alias added: GHSA-8c3v-5v6w-588p
  3. 2026-10-29 Affected versions changed · Red Hat
  4. 2026-11-06 CISA SSVC decision points changed

References

Patch 5

Other 1

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences