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CVE-2026-98237

net: wwan: mhi_wwan_mbim: guard against a cyclic NDP chain

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

net: wwan: mhi_wwan_mbim: guard against a cyclic NDP chain

The NDP traversal in mhi_mbim_rx() only stops when wNextNdpIndex is
zero.  Nothing requires the offsets to advance, so a modem that
points an NDP at itself, or at an earlier NDP, keeps the loop
spinning forever on one CPU.

Break out when the next NDP offset is not larger than the current
one.


Verified in a QEMU guest with a fault injector feeding the driver's
receive callback an NTB whose single NDP points at itself: the
unpatched driver spins in mhi_mbim_rx() with one CPU pinned at 100%
and the thread never returns.  With this check the loop terminates
within one iteration.

Changes in v2: move the non-increasing check to the wNextNdpIndex
retrieval site, as suggested by Loic Poulain, instead of tracking
the previous offset in a separate variable.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version aa730a9905b7b079ef2fffdab7f15dbb842f5c7c
Version < 3ed36ee1b29b028f6bc2ebe100152f61a33df05a
Status affected
Version aa730a9905b7b079ef2fffdab7f15dbb842f5c7c
Version < e4b2c7b50d4f4aa1ddfff731b136d65f65b2b526
Status affected
Version aa730a9905b7b079ef2fffdab7f15dbb842f5c7c
Version < 19b5e8dd884a530d04482e1a8e547f43cad17ed7
Status affected
Version aa730a9905b7b079ef2fffdab7f15dbb842f5c7c
Version < 24ade82d6d993274e99c2c6998848751c35292e7
Status affected
Version aa730a9905b7b079ef2fffdab7f15dbb842f5c7c
Version < 8dad70ff7e25cbcfbcb5101fdbf36d98003eb653
Status affected
Version aa730a9905b7b079ef2fffdab7f15dbb842f5c7c
Version < 829fec45122da58d77a55a3b7ca514dafab98e77
Status affected
Version aa730a9905b7b079ef2fffdab7f15dbb842f5c7c
Version < 5d063822ac5184939c1ed377a339a01d8ae814e8
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.15
Status affected
Version 0
Version < 5.15
Status unaffected
Version <= 5.15.*
Version 5.15.222
Status unaffected
Version <= 6.1.*
Version 6.1.189
Status unaffected
Version <= 6.6.*
Version 6.6.158
Status unaffected
Version <= 6.12.*
Version 6.12.112
Status unaffected
Version <= 6.18.*
Version 6.18.54
Status unaffected
Version <= 7.2.*
Version 7.2.8
Status unaffected
Version <= *
Version 7.3-rc4
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.069
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/3ed36ee1b29b028f6bc2ebe100152f61a33df05a
https://git.kernel.org/stable/c/e4b2c7b50d4f4aa1ddfff731b136d65f65b2b526
https://git.kernel.org/stable/c/19b5e8dd884a530d04482e1a8e547f43cad17ed7
https://git.kernel.org/stable/c/24ade82d6d993274e99c2c6998848751c35292e7
https://git.kernel.org/stable/c/8dad70ff7e25cbcfbcb5101fdbf36d98003eb653
https://git.kernel.org/stable/c/829fec45122da58d77a55a3b7ca514dafab98e77
https://git.kernel.org/stable/c/5d063822ac5184939c1ed377a339a01d8ae814e8