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.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18Upgrade perf6.18Upgrade python3-perf6.18-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade perf6.18-debuginfoUpgrade python3-perf6.18Upgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-modules-extra-commonUpgrade bpftool6.18Upgrade kernel-livepatch-6.18.35-68.127Upgrade kernel6.18-develUpgrade microvm-kernel6.18Upgrade kernel6.18-toolsUpgrade kernel6.18-tools-develUpgrade kernel6.18-debuginfoUpgrade kernel6.18-modules-extraUpgrade kernel6.18-debuginfo-common-x86_64Upgrade bpftool6.18-debuginfoUpgrade kernel6.18-headers | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 22, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-azure-fde-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-7.0.0-1010-azureUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-ibmUpgrade linux-image-aws-7.0Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-aws-64kUpgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-oracle-64kUpgrade linux-image-azure-fdeUpgrade linux-image-raspi-realtimeUpgrade linux-image-raspi-7.0Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-raspiUpgrade linux-image-oracleUpgrade linux-image-awsUpgrade linux-image-azureUpgrade linux-image-azure-7.0 | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 3, 2026 | Jul 19, 2026 |
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