CVE-2026-98236: Linux kernel · net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7, 298659c3677bf622afa9d77549cb4a967f9541e9, 31550d585589fde1ae95bf7f7a8188b2d2fdf1c7 +4
Exploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in the Linux kernel. Users should update to a patched kernel version that includes the commits identified (e.g., dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7 and others). The patch ensures the return value of skb_copy_bits() is checked, and failed copies result in freeing the skb and counting an error, preventing memory leakage.
Description
A vulnerability in the Linux kernel's mhi_wwan_mbim driver (version 5.15) involves improper handling of the return value from skb_copy_bits(). This flaw allows a modem to cause the driver to pass uninitialized kernel heap memory to the network stack, potentially leaking sensitive data. The issue is fixed by checking the copy operation's return value and properly freeing the skb on failure.
References
- git.kernel.org/stable/c/650af68435eaee783824457d2ef78cc5c03c1e88 (opens in a new tab)
- git.kernel.org/stable/c/350fd3125ee26b5243935fd9e2b4d162ffba430a (opens in a new tab)
- git.kernel.org/stable/c/dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7 (opens in a new tab)
- git.kernel.org/stable/c/298659c3677bf622afa9d77549cb4a967f9541e9 (opens in a new tab)
- git.kernel.org/stable/c/02eba5f36d20283f144f75d47f0354a85e4f78f0 (opens in a new tab)
- git.kernel.org/stable/c/7e98216e9da08b79e07a514d2a4f7646f8c9ccb9 (opens in a new tab)
- git.kernel.org/stable/c/31550d585589fde1ae95bf7f7a8188b2d2fdf1c7 (opens in a new tab)