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Overview

  • Linux
  • Linux

08 May 2026
Published
14 May 2026
Updated

CVSS v3.1
HIGH (8.8)
EPSS
1.47%

KEV

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags MSG_SPLICE_PAGES can attach pages from a pipe directly to an skb. TCP marks such skbs with SKBFL_SHARED_FRAG after skb_splice_from_iter(), so later paths that may modify packet data can first make a private copy. The IPv4/IPv6 datagram append paths did not set this flag when splicing pages into UDP skbs. That leaves an ESP-in-UDP packet made from shared pipe pages looking like an ordinary uncloned nonlinear skb. ESP input then takes the no-COW fast path for uncloned skbs without a frag_list and decrypts in place over data that is not owned privately by the skb. Mark IPv4/IPv6 datagram splice frags with SKBFL_SHARED_FRAG, matching TCP. Also make ESP input fall back to skb_cow_data() when the flag is present, so ESP does not decrypt externally backed frags in place. Private nonlinear skb frags still use the existing fast path. This intentionally does not change ESP output. In esp_output_head(), the path that appends the ESP trailer to existing skb tailroom without calling skb_cow_data() is not reachable for nonlinear skbs: skb_tailroom() returns zero when skb->data_len is nonzero, while ESP tailen is positive. Thus ESP output will either use the separate destination-frag path or fall back to skb_cow_data().

Statistics

  • 1 Post

Last activity: 19 hours ago

Fediverse

Profile picture fallback

To update the linux kernel for some recent local privilege escalation bugs CVE-2026-43284, CVE-2026-46333, CVE-2026-46300 (we do have some mitigations installed) we will have to reboot it yet again. We'll do that around 16:15 UTC today (in about 3.5 hours from now). If everything goes according to plan then this should not take more than a couple of minutes. This will briefly interrupt some services for sourceware.org, valgrind.org, cygwin.com, gcc.gnu.org, elfutils.org and dwarfstd.org.

  • 0
  • 0
  • 0
  • 19h ago

Overview

  • Pending

Pending
Published
Pending
Updated

CVSS
Pending
EPSS
Pending

KEV

Description

This candidate has been reserved by a CVE Numbering Authority (CNA). This record will be updated by the assigning CNA once details are available.

Statistics

  • 1 Post

Last activity: 19 hours ago

Fediverse

Profile picture fallback

To update the linux kernel for some recent local privilege escalation bugs CVE-2026-43284, CVE-2026-46333, CVE-2026-46300 (we do have some mitigations installed) we will have to reboot it yet again. We'll do that around 16:15 UTC today (in about 3.5 hours from now). If everything goes according to plan then this should not take more than a couple of minutes. This will briefly interrupt some services for sourceware.org, valgrind.org, cygwin.com, gcc.gnu.org, elfutils.org and dwarfstd.org.

  • 0
  • 0
  • 0
  • 19h ago
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