CVE-2026-74263: Linux kernel · net: wwan: t7xx: check skb_clone in control TX
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 7.0.0-1014.14~24.04.1, 7.0.0-1017.17~24.04.1, 7.0.0-1016.16~24.04.1 +11
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 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 |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
An official fix is available and should be applied. Users should update to patched Linux kernel versions as provided by their distribution. No additional mitigation is required beyond applying the update.
Description
A vulnerability in the Linux kernel's net: wwan: t7xx driver was resolved where a failure to check the result of skb_clone() in the t7xx_port_ctrl_tx() function could lead to a NULL pointer dereference. This occurs because the clone is used immediately to set cloned->len without verifying if the clone succeeded. The fix involves checking the clone before use and preserving existing partial-write behavior if previous fragments were queued.
References
- nvd.nist.gov/vuln/detail/CVE-2026-74263 (opens in a new tab)
- git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d (opens in a new tab)
- git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c (opens in a new tab)
- git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095 (opens in a new tab)
- git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029 (opens in a new tab)
- git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c (opens in a new tab)
- ubuntu.com/security/CVE-2026-74263 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74263 (opens in a new tab)
- git.kernel.org/linus/05f789fa90d95d5771230e78453cedff2486039d (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-3 (opens in a new tab)