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High · 7.8 CVE-2026-64053 EUVD-2026-45626GHSA-xhqx-5f69-qrg5

block: don't overwrite bip_vcnt in bio_integrity_copy_user()

Published Jul 19, 2026 · Updated Oct 19, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.14 Package: linux-aws-6.17 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.14 Package: linux-azure-6.17 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-7.0 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.14 Package: linux-azure-fde-6.2 Package: linux-azure-fde-7.0 Package: linux-azure-nvidia-6.14 Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.14 Package: linux-gcp-6.17 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-7.0 Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.14 Package: linux-hwe-6.17 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-7.0 Package: linux-hwe-edge Package: linux-ibm Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.17 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-7.0 Package: linux-nvidia-bos Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.14 Package: linux-oem-6.17 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oem-7.0 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.14 Package: linux-oracle-6.17 Package: linux-oracle-6.5 Package: linux-oracle-7.0 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.14 Package: linux-realtime-6.17 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.14 Package: linux-riscv-6.17 Package: linux-riscv-6.5 Package: linux-riscv-7.0 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

block: don't overwrite bip_vcnt in bio_integrity_copy_user()

bio_integrity_add_page() already sets bip_vcnt to 1 for the bounce
segment. Overwriting it with nr_vecs breaks bip_vcnt <= bip_max_vcnt
on WRITE (bip_max_vcnt is 1), so the gap-merge checks in block/blk.h
read past the bip_vec[] flex array. On READ the read is in bounds
but lands on a saved user bvec instead of the bounce.

The line was added for split propagation, but bio_integrity_clone()
doesn't copy bip_vcnt and BIP_CLONE_FLAGS excludes BIP_COPY_USER.

Affected products

VendorProductAffectedFixed
Linux Linux 6.11 6.12.92

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 7.0.12-1 —
Debian 13 linux 6.12.94-1 —
ReleasePackageFixed inAdvisory
Ubuntu 26.04 LTS linux 7.0.0-28.28 —
Ubuntu 26.04 LTS linux-aws +2 7.0.0-1009.9 USN-8618-1, USN-8603-1
Ubuntu 26.04 LTS linux-gcp +1 7.0.0-1008.8 USN-8593-1
Ubuntu 26.04 LTS linux-gke 7.0.0-1003.4 —
Ubuntu 26.04 LTS linux-ibm +1 7.0.0-1010.10 USN-8603-1, USN-8593-1
Ubuntu 26.04 LTS linux-nvidia 7.0.0-1016.16 USN-8663-1
Ubuntu 26.04 LTS linux-nvidia-bos 7.0.0-2016.16 USN-8664-1
Ubuntu 26.04 LTS linux-raspi 7.0.0-1015.15 USN-8618-1
Ubuntu 26.04 LTS linux-riscv +1 7.0.0-28.28.1 —
Ubuntu 24.04 LTS linux-azure-7.0 7.0.0-1014.14~24.04.1 USN-8728-2
Ubuntu 24.04 LTS linux-azure-fde-7.0 7.0.0-1013.13~24.04.1 —
Ubuntu 24.04 LTS linux-gcp-7.0 +1 7.0.0-1011.11~24.04.1 USN-8728-3, USN-8728-1
Ubuntu 24.04 LTS linux-hwe-7.0 7.0.0-28.28~24.04.1 —
Ubuntu 24.04 LTS linux-nvidia-7.0 7.0.0-1016.16~24.04.1 USN-8663-1
Ubuntu 24.04 LTS linux-riscv +26 No fix yet —
Ubuntu 24.04 LTS linux-riscv-7.0 7.0.0-28.28.1~24.04.3 —
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-realtime-6.14 +1 No fix yet —
ReleasePackageFixed inAdvisory
RHEL 10 rv +76 6.12.0-211.59.1.el10_2 RHSA-2026:71233
RHEL 9 rv +75 5.14.0-687.51.1.el9_8 RHSA-2026:71232

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 perf +13 6.12.0-211.59.1.el10_2 ALSA-2026:71233
AlmaLinux 9 kernel +16 5.14.0-687.51.1.el9_8 ALSA-2026:71232

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 9 kernel 5.14.0-687.51.1.el9_8 RLSA-2026:71232
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 kernel-64kb +8 6.12.0-160000.38.1 SUSE-SU-2026:23902-1
SLES for SAP 16.0 kernel-default-base 6.12.0-160000.38.1.160000.2.23 SUSE-SU-2026:23902-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_0 21-160000.4.3 SUSE-SU-2026:24672-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_1 19-160000.1.1 SUSE-SU-2026:24678-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_12 +1 8-160000.1.1 SUSE-SU-2026:24679-1, SUSE-SU-2026:24664-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_13 8-160000.1.2 SUSE-SU-2026:24668-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_15 6-160000.1.1 SUSE-SU-2026:24681-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_16 5-160000.1.1 SUSE-SU-2026:24666-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_2 17-160000.1.1 SUSE-SU-2026:24671-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_3 16-160000.1.1 SUSE-SU-2026:24677-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_4 15-160000.1.1 SUSE-SU-2026:24670-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_5 14-160000.1.1 SUSE-SU-2026:24676-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_6 13-160000.1.1 SUSE-SU-2026:24667-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_7 12-160000.1.1 SUSE-SU-2026:24680-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_8 11-160000.1.1 SUSE-SU-2026:24675-1
SLES for SAP 16.0 kernel-livepatch-SLE16_Update_9 +2 10-160000.1.1 SUSE-SU-2026:24674-1, SUSE-SU-2026:24669-1, SUSE-SU-2026:24663-1
SLES 16.0 kernel-64kb +8 6.12.0-160000.38.1 SUSE-SU-2026:23902-1, SUSE-SU-2026:23897-1
SLES 16.0 kernel-default-base 6.12.0-160000.38.1.160000.2.23 SUSE-SU-2026:23902-1
SLES 16.0 kernel-livepatch-SLE16_Update_0 21-160000.4.3 SUSE-SU-2026:24672-1
SLES 16.0 kernel-livepatch-SLE16_Update_1 19-160000.1.1 SUSE-SU-2026:24678-1
SLES 16.0 kernel-livepatch-SLE16_Update_12 +1 8-160000.1.1 SUSE-SU-2026:24679-1, SUSE-SU-2026:24664-1
SLES 16.0 kernel-livepatch-SLE16_Update_13 8-160000.1.2 SUSE-SU-2026:24668-1
SLES 16.0 kernel-livepatch-SLE16_Update_15 6-160000.1.1 SUSE-SU-2026:24681-1
SLES 16.0 kernel-livepatch-SLE16_Update_16 5-160000.1.1 SUSE-SU-2026:24666-1
SLES 16.0 kernel-livepatch-SLE16_Update_2 17-160000.1.1 SUSE-SU-2026:24671-1
SLES 16.0 kernel-livepatch-SLE16_Update_3 16-160000.1.1 SUSE-SU-2026:24677-1
SLES 16.0 kernel-livepatch-SLE16_Update_4 15-160000.1.1 SUSE-SU-2026:24670-1
SLES 16.0 kernel-livepatch-SLE16_Update_5 14-160000.1.1 SUSE-SU-2026:24676-1
SLES 16.0 kernel-livepatch-SLE16_Update_6 13-160000.1.1 SUSE-SU-2026:24667-1
SLES 16.0 kernel-livepatch-SLE16_Update_7 12-160000.1.1 SUSE-SU-2026:24680-1
SLES 16.0 kernel-livepatch-SLE16_Update_8 11-160000.1.1 SUSE-SU-2026:24675-1
SLES 16.0 kernel-livepatch-SLE16_Update_9 +2 10-160000.1.1 SUSE-SU-2026:24674-1, SUSE-SU-2026:24669-1, SUSE-SU-2026:24663-1
SLE Micro 6.2 kernel-default-base 6.12.0-160000.38.1.160000.2.23 SUSE-SU-2026:23887-1
SLE Micro 6.2 kernel-livepatch-SLE16-RT_Update_0 19-160000.3.4 SUSE-SU-2026:24538-1
SLE Micro 6.2 kernel-livepatch-SLE16-RT_Update_1 18-160000.1.1 SUSE-SU-2026:24537-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_0 21-160000.4.3 SUSE-SU-2026:24630-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_1 19-160000.1.1 SUSE-SU-2026:24636-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_12 +4 8-160000.1.1 SUSE-SU-2026:24637-1, SUSE-SU-2026:24621-1, SUSE-SU-2026:24526-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_13 8-160000.1.2 SUSE-SU-2026:24626-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_15 +1 6-160000.1.1 SUSE-SU-2026:24639-1, SUSE-SU-2026:24523-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_16 +1 5-160000.1.1 SUSE-SU-2026:24623-1, SUSE-SU-2026:24522-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_2 17-160000.1.1 SUSE-SU-2026:24629-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_3 +1 16-160000.1.1 SUSE-SU-2026:24635-1, SUSE-SU-2026:24536-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_4 +2 15-160000.1.1 SUSE-SU-2026:24628-1, SUSE-SU-2026:24535-1, SUSE-SU-2026:24533-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_5 +1 14-160000.1.1 SUSE-SU-2026:24634-1, SUSE-SU-2026:24534-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_6 +1 13-160000.1.1 SUSE-SU-2026:24624-1, SUSE-SU-2026:24532-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_7 +1 12-160000.1.1 SUSE-SU-2026:24638-1, SUSE-SU-2026:24531-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_8 +1 11-160000.1.1 SUSE-SU-2026:24633-1, SUSE-SU-2026:24530-1
SLE Micro 6.2 kernel-livepatch-SLE16_Update_9 +5 10-160000.1.1 SUSE-SU-2026:24632-1, SUSE-SU-2026:24627-1, SUSE-SU-2026:24620-1
SLE Micro 6.2 kernel-rt +5 6.12.0-160000.38.1 SUSE-SU-2026:23887-1, SUSE-SU-2026:23881-1
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 kernel-default-base 6.12.0-160000.38.1.160000.2.22 openSUSE-SU-2026:21910-1
openSUSE Leap 16.0 kernel-rt +11 6.12.0-160000.38.1 openSUSE-SU-2026:21910-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.18.35-68.127 +1 1:1.0-0.amzn2023 ALAS2023-2026-1894, ALAS2023-2026-1881
Amazon Linux 2023 perf6.12 +11 1:6.12.92-122.166.amzn2023 ALAS2023-2026-1894
Amazon Linux 2023 perf6.18 +12 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 10 rv +29 6.12.0-211.60.1.el10_2 ELSA-2026-71233
Oracle Linux 9 rv +28 5.14.0-687.51.1.el9_8 ELSA-2026-71232

Advisories 50

References