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CVE-2026-98561

Unknown

Last modified

CVE-2026-98561 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: nfp: hold IPsec RX state under the XArray lock nfp_net_ipsec_rx() drops the XArray lock before taking a reference to the xfrm_state it found. The delete path can erase the entry and drop the last state reference in that interval.

Description

In the Linux kernel, the following vulnerability has been resolved: nfp: hold IPsec RX state under the XArray lock nfp_net_ipsec_rx() drops the XArray lock before taking a reference to the xfrm_state it found. The delete path can erase the entry and drop the last state reference in that interval. RX can then try to increment a zero refcount after the state has been queued for destruction. The driver queues firmware invalidation asynchronously; the delete path does not wait for the command to complete or drain pending RX processing. The XFRM garbage collector waits for an RCU grace period before freeing the state. That delays reclamation but does not make acquiring a reference from zero valid. Take the xfrm_state reference before releasing the XArray lock so xa_erase() cannot run between lookup and reference acquisition.

Affected Software

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

VendorProductVersions
LinuxLinux>= 57f273adbcd44172cbe0bd10b8b7408dd255699f, < c1b1639fb138db52fcfbd1747e92f2454076c6d5; >= 57f273adbcd44172cbe0bd10b8b7408dd255699f, < dd765023bb54f9650f8b9137906fb2c4a554dd1d; >= 57f273adbcd44172cbe0bd10b8b7408dd255699f, < 8468d05aa08dc430b5675beadf6f6fb8943f170b; >= 57f273adbcd44172cbe0bd10b8b7408dd255699f, < fe6c8ea8bfd5d1253bb0de682b1fcc2c4bb92488; >= 57f273adbcd44172cbe0bd10b8b7408dd255699f, < 1a983a4e14c635c40354be110cd9a1a5c94e01e6
LinuxLinux6.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98561?
In the Linux kernel, the following vulnerability has been resolved: nfp: hold IPsec RX state under the XArray lock nfp_net_ipsec_rx() drops the XArray lock before taking a reference to the xfrm_state it found. The delete path can erase the entry and drop the last state reference in that interval. RX can then try to increment a zero refcount after the state has been queued for destruction. The driver queues firmware invalidation asynchronously; the delete path does not wait for the command to complete or drain pending RX processing. The XFRM garbage collector waits for an RCU grace period before freeing the state. That delays reclamation but does not make acquiring a reference from zero valid. Take the xfrm_state reference before releasing the XArray lock so xa_erase() cannot run between lookup and reference acquisition.
How severe is CVE-2026-98561?
Severity scoring for CVE-2026-98561 is pending analysis.
How do I fix CVE-2026-98561?
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.

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Source: NVD / NIST