CVE-2026-98028

Summary

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

eth: nfp: drop the replaced rule from the list when reprogramming fails

nfp_net_fs_add() replaces an existing rule by deleting it from the hardware, decrementing nn->fs.count and programming the new one. If nfp_net_fs_add_hw() fails the old entry stays on nn->fs.list - only the success path reaches list_replace() - so the list is one longer than nn->fs.count, and it advertises a rule whose hardware entry has already been torn down.

nn->fs.count is what ETHTOOL_GRXCLSRLCNT reports, so userspace then sizes its buffer one entry short of what the GRXCLSRLALL walk wants to write. That used to overwrite one u32 past the allocation; since the walk is bounded it is a permanent -EMSGSIZE instead, as nothing ever resyncs the counter.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9eb03bb1c035ff6e2c3a34046419446588253dda < 603b70093f729f52a37544b48679903cad834856affected
LinuxLinux9eb03bb1c035ff6e2c3a34046419446588253dda < edaec279f59f801a05b751df475ed71a0a68c88aaffected
LinuxLinux9eb03bb1c035ff6e2c3a34046419446588253dda < 552e528a7d85cbe088b2ae4f78194713975b46cfaffected
LinuxLinux9eb03bb1c035ff6e2c3a34046419446588253dda < 108bb2142e3a12c9ad625ad662973127a113ddc6affected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References