7.8

CVE-2026-23169

mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()

In the Linux kernel, the following vulnerability has been resolved:

mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()

syzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id()
and/or mptcp_pm_nl_is_backup()

Root cause is list_splice_init() in mptcp_pm_nl_flush_addrs_doit()
which is not RCU ready.

list_splice_init_rcu() can not be called here while holding pernet->lock
spinlock.

Many thanks to Eulgyu Kim for providing a repro and testing our patches.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.201
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.164
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.125
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.72
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.9
Linux ≫ Linux Kernel Version6.19 Updaterc1
Linux ≫ Linux Kernel Version6.19 Updaterc2
Linux ≫ Linux Kernel Version6.19 Updaterc3
Linux ≫ Linux Kernel Version6.19 Updaterc4
Linux ≫ Linux Kernel Version6.19 Updaterc5
Linux ≫ Linux Kernel Version6.19 Updaterc6
Linux ≫ Linux Kernel Version6.19 Updaterc7
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.13% 0.029
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

https://git.kernel.org/stable/c/1f1b9523527df02685dde603f20ff6e603d8e4a1
Patch
https://git.kernel.org/stable/c/e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d
Patch
https://git.kernel.org/stable/c/455e882192c9833f176f3fbbbb2f036b6c5bf555
Patch
https://git.kernel.org/stable/c/51223bdd0f60b06cfc7f25885c4d4be917adba94
Patch
https://git.kernel.org/stable/c/338d40bab283da2639780ee3e458fb61f1567d8c
Patch
https://git.kernel.org/stable/c/7896dbe990d56d5bb8097863b2645355633665eb
Patch