Dirty Frag: Using the Page Caches as an Attack Surface

Dirty Frag is a Linux local privilege escalation LPE chain published on May 7, 2026. It combines two previously unknown kernel vulnerabilities can allow an unprivileged local user to escalate to root on many major Linux distributions. xfrm-ESP Page-Cache Write CVE-2026-43284 RxRPC Page-Cache Writ...

Important: kernel-livepatch-6.12.79-101.147

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Important: kernel-livepatch-6.1.164-196.303

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Important: kernel-livepatch-6.1.163-186.299

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2026-118 (ALASKERNEL-5.10-2026-118)

The version of kernel installed on the remote host is prior to 5.10.253-252.1015. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2026-118 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: nftct: add seqadj...

Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-1694)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1694 advisory. In the Linux kernel, the following vulnerability has been resolved: net/tls: fix use-after-free in -EBUSY error path of tlsdoencryption CVE-2026-31533 In the Linux kernel, the following...

Important: kernel-livepatch-6.18.8-9.213

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Important: kernel-livepatch-6.18.25-52.107

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2026-121 (ALASKERNEL-5.4-2026-121)

The version of kernel installed on the remote host is prior to 5.4.302-224.470. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2026-121 advisory. In the Linux kernel, the following vulnerability has been resolved:xfrm: esp: avoid in-place decrypt on...

Important: kernel-livepatch-5.10.248-247.988

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Amazon Linux 2 : kernel, --advisory ALAS2-2026-3302 (ALAS-2026-3302)

The version of kernel installed on the remote host is prior to 4.14.355-282.728. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3302 advisory. In the Linux kernel, the following vulnerability has been resolved:xfrm: esp: avoid in-place decrypt on shared skb...

Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1693)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1693 advisory. In the Linux kernel, the following vulnerability has been resolved: afunix: Give up GC if MSGPEEK intervened. CVE-2026-23394 In the Linux kernel, the following vulnerability has been resolved:...

Important: kernel-livepatch-6.18.16-18.222

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Important: kernel-livepatch-6.12.74-98.124

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Important: kernel-livepatch-5.10.252-250.992

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Important: kernel-livepatch-6.12.83-111.159

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

Important: kernel-livepatch-6.12.80-106.156

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags "Dirty Frag" and other issues in Amazon Linux kernels: https://aws.amazon.com/security/security-bulletins/2026-027-aws/ CVE-2026-43284 Affected Packages:...

CVE-2026-43373

A flaw was found in the Linux kernel, specifically within the Network Controller Sideband Interface NCSI subsystem. This vulnerability occurs in the NCSI RX and Asynchronous Event Notification AEN handlers, where early return paths fail to release received socket buffers skb when processing inval...

Advisory ROSA-SA-2026-3267

software: kernel-5.15 5.15.193 WASP: ROSA-CHROME unaffected versions = kernel-5.15-5.15.193-5 affected versions kernel-5.15-5.15.193-5 CVE-ID: CVE-2026-43284 BDU-ID: None CVE-Crit: NO DATA CVE-DESC.: A vulnerability in the Linux kernel xfrm subsystem ESP allows data decryption over non-packet skb...

K000161181: Linux kernel vulnerabilities CVE-2026-43284 and CVE-2026-43500

Security Advisory Description CVE-2026-43284 Dirty Frag In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags MSGSPLICEPAGES can attach pages from a pipe directly to an skb. TCP marks such skbs with SKBFLSHAREDFRAG after...