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Vulnerability · Published Jul 19, 2026 · Assigned by Linux

CVE-2026-64053block: don't overwrite bip_vcnt in bio_integrity_copy_user()

High 7.8

In plain English

A high-severity out-of-bounds read in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9kernel5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:10kernel-64k-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-modules5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-modules-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-abi-stablelists5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-debug5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-debug-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:10kernel-debug-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-debug-modules5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-debug-modules-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:10kernel-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-doc6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-headers6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10perf6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10python3-perf6.12.0-211.59.1.el10_2ALSA-2026:71233
Debian:13linux6.12.94-1DEBIAN-CVE-2026-64053
Debian:14linux7.0.12-1DEBIAN-CVE-2026-64053
Rocky Linux:9kernel0:5.14.0-687.51.1.el9_8RLSA-2026:71232
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-64053
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-64053
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-64053
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-64053

Affected products (as reported)

VendorProductVersions
Linux Linux 3991657ae7074c3c497bf095093178bed37ea1b4 – before d18160c9525c63c203656fefd847e94b538cd4a43991657ae7074c3c497bf095093178bed37ea1b4 – before 0d48654af4d1390c888389206cc13b51b82c30e63991657ae7074c3c497bf095093178bed37ea1b4 – before 066be1439593a381b1a29663becfcfe0c92363e73991657ae7074c3c497bf095093178bed37ea1b4 – before 637ad3a56a3b889527d1dacea6fea2a8bd648140
Linux Linux 6.11

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References