CVE ID :CVE-2026-53370<\/p>\n
Published : July 19, 2026, 9:17 a.m. | 23\u00a0minutes ago<\/p>\n
Description :In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
perf\/x86\/intel: Improve validation and configuration of ACR masks<\/p>\n
Currently there are several issues on the user space ACR mask validation
\nand configuration.
\n– The validation for user space ACR mask (attr.config2) is incomplete,
\n e.g., the ACR mask could include the index which belongs to another
\n ACR events group, but it’s not validated.
\n– An early return on an invalid ACR mask caused all subsequent ACR groups
\n to be skipped.
\n– The stale hardware ACR mask (hw.config1) is not cleared before setting
\n new hardware ACR mask.<\/p>\n
The following changes address all of the above issues.
\n– Figure out the event index group of an ACR group. Any bits in the
\n user-space mask not present in the index group are now dropped.
\n– Instead of an early return on invalid bits, drop only the invalid
\n portions and continue iterating through all ACR events to ensure full
\n configuration.
\n– Explicitly clear the stale hardware ACR mask for each event prior to
\n writing the new configuration.<\/p>\n
Besides, a non-leader event member of ACR group could be disabled in
\ntheory. This could cause bit-shifting errors in the acr_mask of remaining
\ngroup members. But since ACR sampling requires all events to be active,
\nthis should not be a big concern in real use case. Add a “FIXME” comment
\nto notice this risk.<\/p>\n
Severity: 0.0 | NA<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID :CVE-2026-53370 Published : July 19, 2026, 9:17 a.m. | 23\u00a0minutes ago Description :In the Linux kernel, the following vulnerability has been resolved: perf\/x86\/intel: Improve validation and configuration of ACR masks Currently there are several issues on the user space ACR mask validation and configuration. – The validation for user space ACR mask (attr.config2) …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82236","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82236"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82236\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}