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CVE-2026-98846

UnknownEPSS 0.16%

Last modified

CVE-2026-98846 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: sctp: check RCV_SHUTDOWN after the sendmsg connect wait sctp_wait_for_connect() drops the socket lock while it sleeps. An out-of-the-blue ABORT can then be processed from the socket backlog and unlink the association. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: check RCV_SHUTDOWN after the sendmsg connect wait sctp_wait_for_connect() drops the socket lock while it sleeps. An out-of-the-blue ABORT can then be processed from the socket backlog and unlink the association. If a concurrent shutdown(fd, SHUT_RD) sets RCV_SHUTDOWN, the waiter breaks with err == 0 before checking asoc->base.dead. Its final sctp_association_put() can then free the association, leaving sctp_sendmsg_to_asoc() to continue with a dangling pointer. Check RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc() before using the association again. The check only accesses the socket, so it needs no additional association reference. Return the existing -ESRCH so that sctp_sendmsg() skips freeing a new association that may already have been destroyed. Keep sctp_wait_for_connect() unchanged to preserve its behavior for the connect() caller.

Metrics

EPSS Probability
0.16%

4.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 668c9beb9020d5834ee9e43c208190a07d2b1928, < 7f798168c54455559da0f7a377a23ab7019fec35; >= 668c9beb9020d5834ee9e43c208190a07d2b1928, < fe5a23c76fc48b711eb7d6f3462c994e34da36f9; >= 668c9beb9020d5834ee9e43c208190a07d2b1928, < 1e7cd89975fa3b11ebd7e1bbb4648a71c0e0e2d4; >= 668c9beb9020d5834ee9e43c208190a07d2b1928, < 1bef1944ef15a40797305bf916827b04df6307ca; >= 668c9beb9020d5834ee9e43c208190a07d2b1928, < e8f972b1759d26bbefe4c524caae1ed7c8a593bd; >= 668c9beb9020d5834ee9e43c208190a07d2b1928, < e701345d886e831fb593a0870d69c8c5de6fc938; >= 668c9beb9020d5834ee9e43c208190a07d2b1928, < 222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669; >= 668c9beb9020d5834ee9e43c208190a07d2b1928, < 4f1da630d13de0370e2f6361f961f1c8b384af1c
LinuxLinux4.16

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98846?
In the Linux kernel, the following vulnerability has been resolved: sctp: check RCV_SHUTDOWN after the sendmsg connect wait sctp_wait_for_connect() drops the socket lock while it sleeps. An out-of-the-blue ABORT can then be processed from the socket backlog and unlink the association. If a concurrent shutdown(fd, SHUT_RD) sets RCV_SHUTDOWN, the waiter breaks with err == 0 before checking asoc->base.dead. Its final sctp_association_put() can then free the association, leaving sctp_sendmsg_to_asoc() to continue with a dangling pointer. Check RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc() before using the association again. The check only accesses the socket, so it needs no additional association reference. Return the existing -ESRCH so that sctp_sendmsg() skips freeing a new association that may already have been destroyed. Keep sctp_wait_for_connect() unchanged to preserve its behavior for the connect() caller.
How severe is CVE-2026-98846?
Severity scoring for CVE-2026-98846 is pending analysis. The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98846?
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