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Vulnerabilities CVE-2026-63912

CVE-2026-63912

None
Open
TLP:CLEAR

xfrm: esp: restore combined single-frag length gate

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Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: restore combined single-frag length gate The ESP out-of-place fast path appends the trailer in esp_output_head() before esp_output_tail() allocates the destination page frag. The head-side gate currently checks skb->data_len and tailen separately, but the tail code allocates a single destination frag from the combined post-trailer skb->data_len. Reject the page-frag fast path when the combined aligned length exceeds a page. Otherwise skb_page_frag_refill() may fall back to a single page while the destination sg still spans the combined skb->data_len. Restore this combined-length page gate for both IPv4 and IPv6.

Details

EPSS Score
0.70%

50.1th percentile

Confidence
90%
Published
Jul 19, 2026
Last Modified
Jul 19, 2026
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