High 7.0Published May 27, 2026

CVE-2026-45998rxrpc: Fix potential UAF after skb_unshare() failure

Updated under an hour ago (Oct 27, 2026, 4:50 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential UAF after skb_unshare() failure If skb_unshare() fails to unshare a packet due to allocation failure in rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread()) will be NULL'd out. This will likely cause the call to trace_rxrpc_rx_done() to oops. Fix this by moving the unsharing down to where rxrpc_input_call_event() calls rxrpc_input_call_packet(). There are a number of places prior to that where we ignore DATA packets for a variety of reasons (such as the call already being complete) for which an unshare is then avoided. And with that, rxrpc_input_packet() doesn't need to take a pointer to the pointer to the packet, so change that to just a pointer.

CVSS: 7.0 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-825
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Sep 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 before e3bf143b1e98fb3d6d9e6825bcd683974d478e8c; from 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 before bf20f46d94f1db38e6ffc0ca204a5fe0de01b495; from 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 before 996b0487b3cdda4c91811dbb1c9564626bc840bd; from 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 before 8fde6296c4d4da2be7ab761305ab7f232b94eefd; 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 builds before 1f2740150f904bfa60e4bad74d65add3ccb5e7f8	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:6.12.0-211.30.1.el10_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:6.12.0-55.98.1.el10_0 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions redhat:rhel_e4s	from 0:5.14.0-284.191.1.el9_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus	from 0:5.14.0-570.140.1.el9_6 not affected	CISA ADP
linux linux_kernel linux:linux_kernel	from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4	NVD

References

References

https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c	patch
https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495	patch
https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd	patch
https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd	patch
https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8	patch
https://access.redhat.com/errata/RHSA-2026:34911
https://access.redhat.com/errata/RHSA-2026:55445
https://access.redhat.com/errata/RHSA-2026:65708
https://access.redhat.com/errata/RHSA-2026:65712
https://access.redhat.com/errata/RHSA-2026:67721
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.