Critical severity · published May 28, 2026
CVE-2026-46137
mptcp: pm: ADD_ADDR rtx: fix potential data-race
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: pm: ADD_ADDR rtx: fix potential data-race
This mptcp_pm_add_timer() helper is executed as a timer callback in
softirq context. To avoid any data races, the socket lock needs to be
held with bh_lock_sock().
If the socket is in use, retry again soon after, similar to what is done
with the keepalive timer.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.10 before 5.10.259; 5.11 before 5.15.210; 5.16 before 6.1.176; 6.2 before 6.6.141; 6.7 before 6.12.91; 6.13 before 6.18.30; +3 more · source: NVD
LI
Linux · Linux
00cfd77b9063dcdf3628a7087faba60de85a9cc8 before d9b272a85fe6b8f993e37915311e4038c814a533; 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 23079e0b7742ec114d3507c3e3aad01b7b69e4af; 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before b35605e1f1e877038c8c9d499babbc891cdd234f; 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 013dcdc1961543b9a3433466bc8c79a2f4ca75b5; 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3; 00cfd77b9063dcdf3628a7087faba60de85a9cc8 before 2ad56e434199ca24a812bb353667aa1c3860f513; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46137
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46137
Patch
https://git.kernel.org/stable/c/013dcdc1961543b9a3433466bc8c79a2f4ca75b5
Patch
https://git.kernel.org/stable/c/23079e0b7742ec114d3507c3e3aad01b7b69e4af
Patch
https://git.kernel.org/stable/c/2ad56e434199ca24a812bb353667aa1c3860f513
Patch
https://git.kernel.org/stable/c/5cd6e0ad79d2615264f63929f8b457ad97ae550d
Patch
https://git.kernel.org/stable/c/6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3
Patch
https://git.kernel.org/stable/c/b35605e1f1e877038c8c9d499babbc891cdd234f
More from Kernel
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
8.8
CVE-2013-6282
Linux Kernel Improper Input Validation Vulnerability
8.4
CVE-2022-0185
Linux Kernel Heap-Based Buffer Overflow Vulnerability
8.4
CVE-2013-2094
Linux Kernel Privilege Escalation Vulnerability