In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
media: v4l2-ctrls: validate HEVC active reference counts<\/p>\n
HEVC slice parameters are shared stateless V4L2 controls, but the common
\nvalidation path does not verify the active L0\/L1 reference counts before
\ndriver-specific code consumes them.<\/p>\n
The original report came from Cedrus, but the active count bounds are
\nnot Cedrus-specific. Validate them in the common HEVC slice control path
\nso stateless HEVC drivers get the same basic guarantees as soon as the
\ncontrol is queued.<\/p>\n
Do not reject ref_idx_l0\/ref_idx_l1 entries here. Existing userspace may
\nuse out-of-range sentinel values such as 0xff for missing references, and
\nsome hardware can use that information for concealment. Keep this common
\ncheck limited to the active reference counts.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
media: v4l2-ctrls: validate HEVC active reference counts<\/p>\n
HEVC slice parameters are shared stateless V4L2 controls, but the common<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5383","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5383","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}