CVE-2026-63912
CRITICAL
INFO
Priority: 0.07
BB Relevance:
80/100
Published: 2026-07-19
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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.
Weakness Classification (1)
Affected Software (11)
| Vendor | Product | Version |
|---|---|---|
| linux | linux_kernel | 4.14.288 – 4.15 |
| linux | linux_kernel | 5.18 |
| linux | linux_kernel | 5.18 |
| linux | linux_kernel | 5.18 |
| linux | linux_kernel | 5.18 |
| linux | linux_kernel | 5.18 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
References & Advisories (8)
Patch
Patch
Patch
Patch
Patch
Patch
Patch
Patch