Vulnerability Intelligence Report
udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74705
In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head, the saved UDP header pointer is no longer valid. Get the UDP header after the pull to avoid a potential use-after-free.
No Active Exploit Signals
CVSS Base Score
10.0
CRITICAL
Exploitability:3.9
Impact Score:6.1
EPSS Probability:0.18%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Linux | Linux | dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < 6a733a38b983d8c2e222f13968209010cf44de87 (affected), dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < 19d89b13a43640b2da2f277ee462d919d988cb6f (affected), dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < b3df61bb745eb5201eac22679a2839d4ccbf3442 (affected), dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < 1ae134c012e10384cdac420b5cc6e0615cde0b55 (affected), dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < 5161e67c561c4f28a5d9335a6e859b02511de92b (affected), dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < 64d322c288577793eedd352b96ef75234ed380fe (affected), dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < 588d4a6795d99d080f74ef0b5f391ea8c453ae5d (affected), dbef491ebe7f3a4fb1b9111878b86a426fd540b7 < d0f86fb36eb260abd10007b62c9dcc1028e03e61 (affected) |
| Linux | Linux | 4.6 (affected), 0 < 4.6 (unaffected), 5.10.265 <= 5.10.* (unaffected), 5.15.216 <= 5.15.* (unaffected), 6.1.183 <= 6.1.* (unaffected), 6.6.152 <= 6.6.* (unaffected), 6.12.104 <= 6.12.* (unaffected), 6.18.45 <= 6.18.* (unaffected), 7.1.9 <= 7.1.* (unaffected), 7.2 <= * (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.177%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | kernel.org · Vendor · USA |
| Reserved | 2026-08-15T05:44:03 |
| Published | 2026-08-22T15:33:04 |
| Last Updated | 2026-08-25T05:41:48 |
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