🛡️ CVE-2026-43284 on Ubuntu — linux

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

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().

Distribution advisory

This page covers CVE-2026-43284 as tracked by Ubuntu, for the package linux. The fix is available in version 7.0.0-22.22; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack vector: Local — a local account, shell or session on the host is needed.
Attack complexity: Low — the attack works reliably, with no preparation.
Privileges required: Low — an ordinary user account is enough.
User interaction: None — nobody has to be tricked into anything.
Scope: Changed — a successful attack reaches components beyond the vulnerable one.
Confidentiality impact: High — total loss, or loss the attacker controls.
Integrity impact: High — total loss, or loss the attacker controls.
Availability impact: High — total loss, or loss the attacker controls.

Affected software

UBUNTU-CVE-2026-43284 is recorded against 157 packages.

linux (fixed in 7.0.0-22.22)
linux-allwinner-5.19
linux-aws (fixed in 7.0.0-1006.6)
linux-aws-5.0
linux-aws-5.11
linux-aws-5.13
linux-aws-5.15 (fixed in 5.15.0-1109.116~20.04.1)
linux-aws-5.19
linux-aws-5.3
linux-aws-5.4 (fixed in 5.4.0-1160.170~18.04.1)
linux-aws-5.8
linux-aws-6.14
linux-aws-6.17 (fixed in 6.17.0-1017.17~24.04.1)
linux-aws-6.2
linux-aws-6.5
linux-aws-6.8 (fixed in 6.8.0-1057.60~22.04.1)
linux-aws-fips (fixed in 6.8.0-1057.60+fips1)
linux-aws-hwe (fixed in 4.15.0-1194.207~16.04.1)
linux-azure (fixed in 7.0.0-1007.7)
linux-azure-4.15 (fixed in 4.15.0-1202.217)
linux-azure-5.11
linux-azure-5.13
linux-azure-5.15 (fixed in 5.15.0-1114.123~20.04.1)
linux-azure-5.19

Show the remaining 133 packages

linux-azure-5.3
linux-azure-5.4 (fixed in 5.4.0-1164.170~18.04.1)
linux-azure-5.8
linux-azure-6.11
linux-azure-6.14
linux-azure-6.17 (fixed in 6.17.0-1017.17~24.04.1)
linux-azure-6.2
linux-azure-6.5
linux-azure-6.8 (fixed in 6.8.0-1059.65~22.04.1)
linux-azure-edge
linux-azure-fde
linux-azure-fde-5.19
linux-azure-fde-6.14
linux-azure-fde-6.2
linux-azure-fde-6.8
linux-azure-fips (fixed in 6.8.0-1059.65+fips1)
linux-azure-nvidia
linux-azure-nvidia-6.14
linux-bluefield
linux-fips (fixed in 6.8.0-124.124+fips1)
linux-gcp (fixed in 7.0.0-1005.5)
linux-gcp-4.15 (fixed in 4.15.0-1186.203)
linux-gcp-5.11
linux-gcp-5.13
linux-gcp-5.15 (fixed in 5.15.0-1109.118~20.04.1)
linux-gcp-5.19
linux-gcp-5.3
linux-gcp-5.4 (fixed in 5.4.0-1163.172~18.04.1)
linux-gcp-5.8
linux-gcp-6.11
linux-gcp-6.14
linux-gcp-6.17 (fixed in 6.17.0-1018.19~24.04.1)
linux-gcp-6.2
linux-gcp-6.5
linux-gcp-6.8 (fixed in 6.8.0-1060.63~22.04.1)
linux-gcp-fips (fixed in 6.8.0-1060.63+fips1)
linux-gke (fixed in 6.8.0-1055.61)
linux-gke-4.15
linux-gke-5.15
linux-gke-5.4
linux-gkeop (fixed in 6.8.0-1042.45)
linux-gkeop-5.15
linux-gkeop-5.4
linux-hwe
linux-hwe-5.11
linux-hwe-5.13
linux-hwe-5.15 (fixed in 5.15.0-181.191~20.04.1)
linux-hwe-5.19
linux-hwe-5.4 (fixed in 5.4.0-231.251~18.04.1)
linux-hwe-5.8
linux-hwe-6.11
linux-hwe-6.14
linux-hwe-6.17 (fixed in 6.17.0-35.35~24.04.1)
linux-hwe-6.2
linux-hwe-6.5
linux-hwe-6.8 (fixed in 6.8.0-124.124~22.04.1)
linux-hwe-7.0 (fixed in 7.0.0-28.28~24.04.1)
linux-hwe-edge
linux-ibm (fixed in 7.0.0-1007.7)
linux-ibm-5.15 (fixed in 5.15.0-1103.106~20.04.1)
linux-ibm-5.4 (fixed in 5.4.0-1107.112~18.04.1)
linux-ibm-6.8 (fixed in 6.8.0-1057.58~22.04.1)
linux-intel-5.13
linux-intel-iot-realtime (fixed in 5.15.0-1101.103)
linux-intel-iotg (fixed in 5.15.0-1104.110)
linux-intel-iotg-5.15 (fixed in 5.15.0-1104.110~20.04.1)
linux-iot (fixed in 5.4.0-1064.67)
linux-kvm (fixed in 5.15.0-1101.106)
linux-lowlatency (fixed in 6.8.0-134.134.1)
linux-lowlatency-hwe-5.15 (fixed in 5.15.0-181.191~20.04.1)
linux-lowlatency-hwe-5.19
linux-lowlatency-hwe-6.11
linux-lowlatency-hwe-6.2
linux-lowlatency-hwe-6.5
linux-lowlatency-hwe-6.8 (fixed in 6.8.0-134.134.1~22.04.1)
linux-nvidia (fixed in 7.0.0-1009.9)
linux-nvidia-6.11
linux-nvidia-6.17 (fixed in 6.17.0-1021.21)
linux-nvidia-6.2
linux-nvidia-6.5
linux-nvidia-6.8 (fixed in 6.8.0-1055.58~22.04.1)
linux-nvidia-lowlatency (fixed in 6.8.0-1055.58.1)
linux-nvidia-tegra (fixed in 6.8.0-1026.26)
linux-nvidia-tegra-5.15 (fixed in 5.15.0-1061.61~20.04.1)
linux-nvidia-tegra-igx (fixed in 5.15.0-1050.50)
linux-oem
linux-oem-5.10
linux-oem-5.13
linux-oem-5.14
linux-oem-5.17
linux-oem-5.6
linux-oem-6.0
linux-oem-6.1
linux-oem-6.11
linux-oem-6.14
linux-oem-6.17 (fixed in 6.17.0-1024.24)
linux-oem-6.5
linux-oem-6.8
linux-oem-7.0 (fixed in 7.0.0-1008.8)
linux-oracle (fixed in 7.0.0-1005.5)
linux-oracle-5.0
linux-oracle-5.11
linux-oracle-5.13
linux-oracle-5.15 (fixed in 5.15.0-1106.112~20.04.1)
linux-oracle-5.3
linux-oracle-5.4 (fixed in 5.4.0-1158.168~18.04.1)
linux-oracle-5.8
linux-oracle-6.14
linux-oracle-6.17 (fixed in 6.17.0-1016.16~24.04.1)
linux-oracle-6.5
linux-oracle-6.8 (fixed in 6.8.0-1054.55~22.04.1)
linux-raspi (fixed in 7.0.0-1011.11)
linux-raspi-5.4 (fixed in 5.4.0-1143.156~18.04.1)
linux-raspi-realtime (fixed in 6.8.0-2046.47)
linux-raspi2
linux-realtime (fixed in 7.0.0-22.22.1)
linux-realtime-6.14
linux-realtime-6.17 (fixed in 6.17.0-1014.16~24.04.1)
linux-realtime-6.8 (fixed in 6.8.1-1052.53~22.04.1)
linux-riscv (fixed in 7.0.0-22.22.1)
linux-riscv-5.11
linux-riscv-5.15 (fixed in 5.15.0-1103.107~20.04.1)
linux-riscv-5.19
linux-riscv-5.8
linux-riscv-6.14
linux-riscv-6.17 (fixed in 6.17.0-35.35.1~24.04.1)
linux-riscv-6.5
linux-riscv-6.8 (fixed in 6.8.0-124.124~22.04.1)
linux-starfive-5.19
linux-starfive-6.2
linux-starfive-6.5
linux-xilinx (fixed in 6.8.0-1032.33)
linux-xilinx-zynqmp (fixed in 5.15.0-1074.78)

Timeline and source

Published on 8 May 2026 and last revised on 19 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

Other advisories for this package

linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

DEBIAN-CVE-2022-4994 (published 30 Jul 2026)
CVE-2026-35233 (4.4 Medium, published 1 May 2026)
CVE-2026-21996 (3.3 Low, published 1 May 2026)
CVE-2026-21991 (5.5 Medium, published 16 Mar 2026)
CGA-w6xv-3fg4-grm5 (published 29 Jan 2026)
CGA-mcwh-q4vm-9f29 (published 29 Jan 2026)
CGA-58q9-gmq4-72q9 (published 7 Jan 2026)
CGA-gc36-8wpr-3gf8 (published 7 Jan 2026)

CVE-2026-43284 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

BellSoft — BELL-CVE-2026-43284 Base record — CVE-2026-43284 Debian — DEBIAN-CVE-2026-43284 Debian 11 (Root.io) — ROOT-OS-DEBIAN-11-CVE-2026-43284 Debian 12 (Root.io) — ROOT-OS-DEBIAN-12-CVE-2026-43284

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-05-08

Updated 2026-08-20

Modified 2026-08-19

Fix URL N/A

Affected Packages

Software	From version	Fixed in
linux	—	7.0.0-22.22
linux-allwinner-5.19	—	—
linux-aws	—	7.0.0-1006.6
linux-aws-5.0	—	—
linux-aws-5.11	—	—
linux-aws-5.13	—	—
linux-aws-5.15	—	5.15.0-1109.116~20.04.1
linux-aws-5.19	—	—
linux-aws-5.3	—	—
linux-aws-5.4	—	5.4.0-1160.170~18.04.1
linux-aws-5.8	—	—
linux-aws-6.14	—	—
linux-aws-6.17	—	6.17.0-1017.17~24.04.1
linux-aws-6.2	—	—
linux-aws-6.5	—	—
linux-aws-6.8	—	6.8.0-1057.60~22.04.1
linux-aws-fips	—	6.8.0-1057.60+fips1
linux-aws-hwe	—	4.15.0-1194.207~16.04.1
linux-azure	—	7.0.0-1007.7
linux-azure-4.15	—	4.15.0-1202.217
linux-azure-5.11	—	—
linux-azure-5.13	—	—
linux-azure-5.15	—	5.15.0-1114.123~20.04.1
linux-azure-5.19	—	—
linux-azure-5.3	—	—
linux-azure-5.4	—	5.4.0-1164.170~18.04.1
linux-azure-5.8	—	—
linux-azure-6.11	—	—
linux-azure-6.14	—	—
linux-azure-6.17	—	6.17.0-1017.17~24.04.1
linux-azure-6.2	—	—
linux-azure-6.5	—	—
linux-azure-6.8	—	6.8.0-1059.65~22.04.1
linux-azure-edge	—	—
linux-azure-fde	—	—
linux-azure-fde-5.19	—	—
linux-azure-fde-6.14	—	—
linux-azure-fde-6.2	—	—
linux-azure-fde-6.8	—	—
linux-azure-fips	—	6.8.0-1059.65+fips1
linux-azure-nvidia	—	—
linux-azure-nvidia-6.14	—	—
linux-bluefield	—	—
linux-fips	—	6.8.0-124.124+fips1
linux-gcp	—	7.0.0-1005.5
linux-gcp-4.15	—	4.15.0-1186.203
linux-gcp-5.11	—	—
linux-gcp-5.13	—	—
linux-gcp-5.15	—	5.15.0-1109.118~20.04.1
linux-gcp-5.19	—	—
linux-gcp-5.3	—	—
linux-gcp-5.4	—	5.4.0-1163.172~18.04.1
linux-gcp-5.8	—	—
linux-gcp-6.11	—	—
linux-gcp-6.14	—	—
linux-gcp-6.17	—	6.17.0-1018.19~24.04.1
linux-gcp-6.2	—	—
linux-gcp-6.5	—	—
linux-gcp-6.8	—	6.8.0-1060.63~22.04.1
linux-gcp-fips	—	6.8.0-1060.63+fips1
linux-gke	—	6.8.0-1055.61
linux-gke-4.15	—	—
linux-gke-5.15	—	—
linux-gke-5.4	—	—
linux-gkeop	—	6.8.0-1042.45
linux-gkeop-5.15	—	—
linux-gkeop-5.4	—	—
linux-hwe	—	—
linux-hwe-5.11	—	—
linux-hwe-5.13	—	—
linux-hwe-5.15	—	5.15.0-181.191~20.04.1
linux-hwe-5.19	—	—
linux-hwe-5.4	—	5.4.0-231.251~18.04.1
linux-hwe-5.8	—	—
linux-hwe-6.11	—	—
linux-hwe-6.14	—	—
linux-hwe-6.17	—	6.17.0-35.35~24.04.1
linux-hwe-6.2	—	—
linux-hwe-6.5	—	—
linux-hwe-6.8	—	6.8.0-124.124~22.04.1
linux-hwe-7.0	—	7.0.0-28.28~24.04.1
linux-hwe-edge	—	—
linux-ibm	—	7.0.0-1007.7
linux-ibm-5.15	—	5.15.0-1103.106~20.04.1
linux-ibm-5.4	—	5.4.0-1107.112~18.04.1
linux-ibm-6.8	—	6.8.0-1057.58~22.04.1
linux-intel-5.13	—	—
linux-intel-iot-realtime	—	5.15.0-1101.103
linux-intel-iotg	—	5.15.0-1104.110
linux-intel-iotg-5.15	—	5.15.0-1104.110~20.04.1
linux-iot	—	5.4.0-1064.67
linux-kvm	—	5.15.0-1101.106
linux-lowlatency	—	6.8.0-134.134.1
linux-lowlatency-hwe-5.15	—	5.15.0-181.191~20.04.1
linux-lowlatency-hwe-5.19	—	—
linux-lowlatency-hwe-6.11	—	—
linux-lowlatency-hwe-6.2	—	—
linux-lowlatency-hwe-6.5	—	—
linux-lowlatency-hwe-6.8	—	6.8.0-134.134.1~22.04.1
linux-nvidia	—	7.0.0-1009.9
linux-nvidia-6.11	—	—
linux-nvidia-6.17	—	6.17.0-1021.21
linux-nvidia-6.2	—	—
linux-nvidia-6.5	—	—
linux-nvidia-6.8	—	6.8.0-1055.58~22.04.1
linux-nvidia-lowlatency	—	6.8.0-1055.58.1
linux-nvidia-tegra	—	6.8.0-1026.26
linux-nvidia-tegra-5.15	—	5.15.0-1061.61~20.04.1
linux-nvidia-tegra-igx	—	5.15.0-1050.50
linux-oem	—	—
linux-oem-5.10	—	—
linux-oem-5.13	—	—
linux-oem-5.14	—	—
linux-oem-5.17	—	—
linux-oem-5.6	—	—
linux-oem-6.0	—	—
linux-oem-6.1	—	—
linux-oem-6.11	—	—
linux-oem-6.14	—	—
linux-oem-6.17	—	6.17.0-1024.24
linux-oem-6.5	—	—
linux-oem-6.8	—	—
linux-oem-7.0	—	7.0.0-1008.8
linux-oracle	—	7.0.0-1005.5
linux-oracle-5.0	—	—
linux-oracle-5.11	—	—
linux-oracle-5.13	—	—
linux-oracle-5.15	—	5.15.0-1106.112~20.04.1
linux-oracle-5.3	—	—
linux-oracle-5.4	—	5.4.0-1158.168~18.04.1
linux-oracle-5.8	—	—
linux-oracle-6.14	—	—
linux-oracle-6.17	—	6.17.0-1016.16~24.04.1
linux-oracle-6.5	—	—
linux-oracle-6.8	—	6.8.0-1054.55~22.04.1
linux-raspi	—	7.0.0-1011.11
linux-raspi-5.4	—	5.4.0-1143.156~18.04.1
linux-raspi-realtime	—	6.8.0-2046.47
linux-raspi2	—	—
linux-realtime	—	7.0.0-22.22.1
linux-realtime-6.14	—	—
linux-realtime-6.17	—	6.17.0-1014.16~24.04.1
linux-realtime-6.8	—	6.8.1-1052.53~22.04.1
linux-riscv	—	7.0.0-22.22.1
linux-riscv-5.11	—	—
linux-riscv-5.15	—	5.15.0-1103.107~20.04.1
linux-riscv-5.19	—	—
linux-riscv-5.8	—	—
linux-riscv-6.14	—	—
linux-riscv-6.17	—	6.17.0-35.35.1~24.04.1
linux-riscv-6.5	—	—
linux-riscv-6.8	—	6.8.0-124.124~22.04.1
linux-starfive-5.19	—	—
linux-starfive-6.2	—	—
linux-starfive-6.5	—	—
linux-xilinx	—	6.8.0-1032.33
linux-xilinx-zynqmp	—	5.15.0-1074.78

References

REPORT https://ubuntu.com/security/CVE-2026-43284

REPORT https://www.cve.org/CVERecord?id=CVE-2026-43284

REPORT https://www.openwall.com/lists/oss-security/2026/05/08/7

REPORT https://www.openwall.com/lists/oss-security/2026/05/07/8

REPORT https://ubuntu.com/blog/dirty-frag-linux-vulnerability-fixes-available

REPORT https://github.com/0xdeadbeefnetwork/Copy_Fail2-Electric_Boogaloo/tree/main

REPORT https://github.com/V4bel/dirtyfrag

REPORT https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4

REPORT https://ubuntu.com/blog/dirty-frag-linux-vulnerability-fixes-available

ADVISORY https://ubuntu.com/security/notices/USN-8370-1

ADVISORY https://ubuntu.com/security/notices/USN-8371-1

ADVISORY https://ubuntu.com/security/notices/USN-8373-1

ADVISORY https://ubuntu.com/security/notices/USN-8374-1

ADVISORY https://ubuntu.com/security/notices/USN-8388-1

ADVISORY https://ubuntu.com/security/notices/USN-8389-1

ADVISORY https://ubuntu.com/security/notices/USN-8390-1

ADVISORY https://ubuntu.com/security/notices/USN-8391-1

ADVISORY https://ubuntu.com/security/notices/USN-8392-1

ADVISORY https://ubuntu.com/security/notices/USN-8393-1

ADVISORY https://ubuntu.com/security/notices/USN-8426-1

ADVISORY https://ubuntu.com/security/notices/USN-8426-2

ADVISORY https://ubuntu.com/security/notices/USN-8440-1

ADVISORY https://ubuntu.com/security/notices/USN-8390-2

ADVISORY https://ubuntu.com/security/notices/USN-8388-2

ADVISORY https://ubuntu.com/security/notices/USN-8461-1

ADVISORY https://ubuntu.com/security/notices/USN-8462-1

ADVISORY https://ubuntu.com/security/notices/USN-8489-1

ADVISORY https://ubuntu.com/security/notices/USN-8497-1

ADVISORY https://ubuntu.com/security/notices/USN-8499-1

ADVISORY https://ubuntu.com/security/notices/USN-8528-1

ADVISORY https://ubuntu.com/security/notices/USN-8530-1

ADVISORY https://ubuntu.com/security/notices/USN-8569-1

ADVISORY https://ubuntu.com/security/notices/USN-8616-1

ADVISORY https://ubuntu.com/security/notices/USN-8530-2

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🛡️ CVE-2026-43284 on Ubuntu — linux

Description

Distribution advisory

How this vulnerability can be exploited

CVSS metrics in full

Affected software

Timeline and source

References

Other advisories for this package

CVE-2026-43284 on other distributions

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