CVE-2026-98238net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb() The netif index carried in the DPMAIF PIT header is five bits wide, but ccmni_inst[] only has room for NIC_DEV_MAX (21) entries. t7xx_ccmni_recv_skb() indexes the array without a bounds check, so indexes 21 to 31 read past it. The out-of-bounds value lands in the callback table that follows the array, which is never NULL, so the existing !ccmni check does not catch it and the driver dereferences whatever sits there as a struct t7xx_ccmni. Drop the skb when the index is out of range. Verified in a QEMU guest with a fault injector setting the netif index to 25: the unpatched driver reads a value past ccmni_inst[], which lands in the callback table, and dereferences it far enough to queue the skb. With this check the packet is dropped. Well-formed traffic on index 0 is unaffected. Changes in v2: none.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- 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
- Received
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 05d19bf500f8281f574713479b04679fa226d0a3 before 7c2fe308bda5a7e6222d7f0c3c311991372baab4; from 05d19bf500f8281f574713479b04679fa226d0a3 before fba45070e25abdae08bcaebfadeef050dc39e208; from 05d19bf500f8281f574713479b04679fa226d0a3 before e1b0609b1a40da03e385be290853a604eb4c3fb9; from 05d19bf500f8281f574713479b04679fa226d0a3 before 9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad; from 05d19bf500f8281f574713479b04679fa226d0a3 before d28aa2de9654e8024922775520a2665e00c04ad5; from 05d19bf500f8281f574713479b04679fa226d0a3 before c7ead9704249d57d4693a04697e3bbd285138fa9 | CNA record |
References
- https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4
- https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208
- https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9
- https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad
- https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5
- https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9
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.