CVE-2026-81000
🗓️ 11 Sep 2026 19:42:54Reported by LinuxType 
cve🔗 web.nvd.nist.gov📰️ 2 Media mentions👁 92 Views🌐 WEB
| Reporter | Title | Published | Views | Family All 154 |
|---|---|---|---|---|
 | Exploit for CVE-2026-81000 | 19 Sep 202616:25 | – | githubexploit |
| TUNderflow | 18 Sep 202604:38 | – | githubexploit |
 | Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-3102) | 29 Sep 202600:00 | – | nessus |
| Amazon Linux 2 : kernel (ALAS-2026-3929) | 18 Sep 202600:00 | – | nessus |
| Amazon Linux 2 : kernel (ALASKERNEL-5.10-2026-131) | 24 Sep 202600:00 | – | nessus |
| Amazon Linux 2 : kernel (ALASKERNEL-5.15-2026-115) | 24 Sep 202600:00 | – | nessus |
| Amazon Linux 2 : kernel (ALASKERNEL-5.4-2026-130) | 18 Sep 202600:00 | – | nessus |
| AlmaLinux 8 : kernel-rt (ALSA-2026:71016) | 24 Sep 202600:00 | – | nessus |
| AlmaLinux 8 : kernel (ALSA-2026:71213) | 24 Sep 202600:00 | – | nessus |
| CentOS Linux 7.9 [CIQ] Security Update: bpftool / kernel / kernel-abi-whitelists / kernel-debug / etc Multiple Vulnerabilities (ciqsa-2026_1551) | 1 Oct 202600:00 | – | nessus |
10
Node
OR
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/tun.c"
],
"versions": [
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "ad715e713610d2d5473c3a6498c825ccecf26491",
"status": "affected",
"versionType": "git"
},
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "708e87937de93f445225c134a2e20519f9b4ce60",
"status": "affected",
"versionType": "git"
},
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "18ef24cdb2eba32e38f1d27f2d02b7b4212e8f76",
"status": "affected",
"versionType": "git"
},
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "010eee265d6bd8769b6a523d2a0693d9b3f5df43",
"status": "affected",
"versionType": "git"
},
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "379d85c7f25f3e05a428225e6b8a65613c6e9b9d",
"status": "affected",
"versionType": "git"
},
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "e098d9cc8859614a7f7baebc96e32a5a16b18ed2",
"status": "affected",
"versionType": "git"
},
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "0ada54ea63e48b9c1608e917ccb7dfadbe86db28",
"status": "affected",
"versionType": "git"
},
{
"version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
"lessThan": "447c9303942c439a117d9b76ce6d6e2116b38ee7",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/tun.c"
],
"versions": [
{
"version": "4.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.6",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.109",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.50",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.4",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3-rc1",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]| Parameter | Position | Path | Description | CWE |
|---|---|---|---|---|
| tun->align | path | drivers/net/tun.c/tun_get_user | Integer underflow in tun_get_user leading to invalid skb->data placement due to oversized receive headroom. | CWE-191 |
| tun->align | path | drivers/net/tun.c/tun_set_headroom | Vulnerability arises from using oversized align value in headroom calculations in tun_set_headroom, enabling underflow in skb sizing. | CWE-191 |
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14 Sep 2026 13:18Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.17.8
EPSS0.00357