https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 03:44:07 +0000 https://vulnerability.circl.lu/vuln/cve-2026-64053 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>block: don&#39;t overwrite bip_vcnt in bio_integrity_copy_user()</p> <p>bio_integrity_add_page() already sets bip_vcnt to 1 for the bounce segment. Overwriting it with nr_vecs breaks bip_vcnt &lt;= 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.</p> <p>The line was added for split propagation, but bio_integrity_clone() doesn&#39;t copy bip_vcnt and BIP_CLONE_FLAGS excludes BIP_COPY_USER.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>block: don&#39;t overwrite bip_vcnt in bio_integrity_copy_user()</p> <p>bio_integrity_add_page() already sets bip_vcnt to 1 for the bounce segment. Overwriting it with nr_vecs breaks bip_vcnt &lt;= 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.</p> <p>The line was added for split propagation, but bio_integrity_clone() doesn&#39;t copy bip_vcnt and BIP_CLONE_FLAGS excludes BIP_COPY_USER.</p> https://vulnerability.circl.lu/vuln/cve-2026-64053