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.
Affected versions
Linux kernel versions
4.16
and later are affected. Fixed in
6.12.113,
6.18.56,
7.2.10,
7.3
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-98846?
CVE-2026-98846 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.16 onward and has been patched in 6.12.113, 6.18.56, 7.2.10 and others. CVE-2026-98846 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98846?
Yes. CVE-2026-98846 has been patched. Fixed versions include 6.12.113, 6.18.56, 7.2.10 and others. If you are running Linux kernel 4.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98846 actively exploited?
No. CVE-2026-98846 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.