Strix
72.3K

CVE-2026-98625

Unknown

Last modified

CVE-2026-98625 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: publish HW_DEAD after worker is done flow_offload_work_del() sets NF_FLOW_HW_DEAD before the work handler clears NF_FLOW_HW_PENDING. Once a flow is both HW_DYING and HW_DEAD, a concurrent garbage collection pass can remove it and schedule it for RCU freeing. The offload worker holds neither an RCU read lock nor a reference to the flow.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: publish HW_DEAD after worker is done flow_offload_work_del() sets NF_FLOW_HW_DEAD before the work handler clears NF_FLOW_HW_PENDING. Once a flow is both HW_DYING and HW_DEAD, a concurrent garbage collection pass can remove it and schedule it for RCU freeing. The offload worker holds neither an RCU read lock nor a reference to the flow. If it is preempted after publishing HW_DEAD, the RCU callback can free the flow before the worker resumes and clears HW_PENDING, resulting in a use-after-free. Move HW_DEAD publication to the common worker epilogue after the pending bit is cleared, making it the final flow access by destroy work. Order all preceding flow accesses before publishing the bit that allows garbage collection to free the object.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < f92e8f39726ba68a7c42c6b7566be687c8161579; >= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < 00e452a7ca9fda135ea3d04a11128d5088e354a8; >= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < 56f39c7d139bb76072efe2fb3dcafc13ba915ad8; >= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < e20701843032c438f879066a77ea85e361c6b999; >= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < b4f0f05dfbe836a171bff261f17d098a4d5461ea; >= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < b0ef9450e93f2adeb77593db14c2ac7c6c8f5060; >= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < f26652e99f519e6bd34f8a9b48fbb33c603585f2; >= 2c8897953f3b2ff5498f3f275708a742bfcdbc24, < d644b23afe1ef509c9961a6d84a093c2587edf02
LinuxLinux5.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98625?
In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: publish HW_DEAD after worker is done flow_offload_work_del() sets NF_FLOW_HW_DEAD before the work handler clears NF_FLOW_HW_PENDING. Once a flow is both HW_DYING and HW_DEAD, a concurrent garbage collection pass can remove it and schedule it for RCU freeing. The offload worker holds neither an RCU read lock nor a reference to the flow. If it is preempted after publishing HW_DEAD, the RCU callback can free the flow before the worker resumes and clears HW_PENDING, resulting in a use-after-free. Move HW_DEAD publication to the common worker epilogue after the pending bit is cleared, making it the final flow access by destroy work. Order all preceding flow accesses before publishing the bit that allows garbage collection to free the object.
How severe is CVE-2026-98625?
Severity scoring for CVE-2026-98625 is pending analysis.
How do I fix CVE-2026-98625?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-98625?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST