net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()
Summary
| CVE | CVE-2026-98238 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-06 09:18:11 UTC |
| Updated | 2026-10-19 10:18:24 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001800000 probability, percentile 0.069200000 (date 2026-10-06)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 05d19bf500f8281f574713479b04679fa226d0a3 7c2fe308bda5a7e6222d7f0c3c311991372baab4 git | Not specified |
| CNA | Linux | Linux | affected 05d19bf500f8281f574713479b04679fa226d0a3 fba45070e25abdae08bcaebfadeef050dc39e208 git | Not specified |
| CNA | Linux | Linux | affected 05d19bf500f8281f574713479b04679fa226d0a3 e1b0609b1a40da03e385be290853a604eb4c3fb9 git | Not specified |
| CNA | Linux | Linux | affected 05d19bf500f8281f574713479b04679fa226d0a3 9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad git | Not specified |
| CNA | Linux | Linux | affected 05d19bf500f8281f574713479b04679fa226d0a3 d28aa2de9654e8024922775520a2665e00c04ad5 git | Not specified |
| CNA | Linux | Linux | affected 05d19bf500f8281f574713479b04679fa226d0a3 c7ead9704249d57d4693a04697e3bbd285138fa9 git | Not specified |
| CNA | Linux | Linux | affected 5.19 | Not specified |
| CNA | Linux | Linux | unaffected 5.19 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.189 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.112 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.54 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.8 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.