mm/mm_init: fix uninitialized struct pages for ZONE_DEVICE
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.1.184, 6.6.145, 6.12.97, 6.18.40, 7.1.5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/mm_init: fix uninitialized struct pages for ZONE_DEVICE If DAX memory is hotplugged into an unoccupied subsection of an early section, section_activate() reuses the unoptimized boot memmap. However, compound_nr_pages() still assumes that vmemmap optimization is in effect and initializes only the reduced number of struct pages. As a result, the remaining tail struct pages are left uninitialized, which can later lead to unexpected behavior or crashes. Fix this by treating early sections as unoptimized when calculating how many struct pages to initialize.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From 6fd3620b342861de9547ea01d28f664892ef51a1 · fixed in c5ef574d57e4a701485c13f26822328c91f05413; From 6fd3620b342861de9547ea01d28f664892ef51a1 · fixed in 511a60e71aec308b24722cffc1912bf6befb87bf; From 6fd3620b342861de9547ea01d28f664892ef51a1 · fixed in 11f2826e9ee6f24aaa774e3dcd75abbe4b3091b6; From 6fd3620b342861de9547ea01d28f664892ef51a1 · fixed in da5234df0941665f3a3f5b80f3dab94046537be0; From 6fd3620b342861de9547ea01d28f664892ef51a1 · fixed in b91e27bce37cab9f35de0059278ebe457ca9878b; From 6fd3620b342861de9547ea01d28f664892ef51a1 · fixed in cd681403a87085562499d60325b7b45d3be11217
- Linux Linux
5.19
- KernelLinux
From 5.19.0 · fixed in 6.1.184; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5