[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2026-31466":6},{"stargazers_count":4,"fetched_at":5},7,"2026-07-31T03:17:55.401Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":17,"related":18,"reserved_at":9,"published_at":19,"modified_at":20,"state":9,"summary":21,"references_raw":23,"kevs":30,"epss":9,"epss_history":31,"metrics":32,"affected":39},"DEBIAN-CVE-2026-31466","In the Linux kernel, the following vulnerability has been resolved:  mm/huge_memory: fix folio isn't locked in softleaf_to_folio()  On arm64 server, we found folio that get from migration entry isn't locked in softleaf_to_folio().  This issue triggers when mTHP splitting and zap_nonpresent_ptes() races, and the root cause is lack of memory barrier in softleaf_to_folio().  The race is as follows:  \tCPU0                                             CPU1  deferred_split_scan()                              zap_nonpresent_ptes()   lock folio   split_folio()     unmap_folio()       change ptes to migration entries     __split_folio_to_order()                         softleaf_to_folio()       set flags(including PG_locked) for tail pages    folio = pfn_folio(softleaf_to_pfn(entry))       smp_wmb()                                        VM_WARN_ON_ONCE(!folio_test_locked(folio))       prep_compound_page() for tail pages  In __split_folio_to_order(), smp_wmb() guarantees page flags of tail pages are visible before the tail page becomes non-compound.  smp_wmb() should be paired with smp_rmb() in softleaf_to_folio(), which is missed.  As a result, if zap_nonpresent_ptes() accesses migration entry that stores tail pfn, softleaf_to_folio() may see the updated compound_head of tail page before page->flags.  This issue will trigger VM_WARN_ON_ONCE() in pfn_swap_entry_folio() because of the race between folio split and zap_nonpresent_ptes() leading to a folio incorrectly undergoing modification without a folio lock being held.  This is a BUG_ON() before commit 93976a20345b (\"mm: eliminate further swapops predicates\"), which in merged in v6.19-rc1.  To fix it, add missing smp_rmb() if the softleaf entry is migration entry in softleaf_to_folio() and softleaf_to_page().  [tujinjiang@huawei.com: update function name and comments]",null,[],[],[],[14],{"_key":15},"CVE-2026-31466",[],[],[],"2026-04-22T14:16:42.780Z","2026-06-15T19:06:15.914735059Z",{"cisa_kev":22,"cisa_ransomware":22,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[24],{"url":25,"sources":26,"tags":28},"https://security-tracker.debian.org/tracker/CVE-2026-31466",[27],"osv_debian",[29],"Advisory",[],[],[33],{"source":27,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":34,"cvss_v4_0":9},{"baseScore":35,"baseSeverity":9,"vectorString":36,"impactScore":37,"exploitabilityScore":38},4.7,"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",6,2.6,[40,65],{"ecosystem":41,"name":42,"vendor":43,"product":42,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":42,"source":9,"versions":45},"Debian","linux","debian","deb",[46,50,51,52,56,59,62],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},{"version":53,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":55,"fixed_in":9},"lt5_10_257_1","5.10.257-1","excluding",{"version":57,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":58,"version_end_type":55,"fixed_in":9},"lt6_1_170_1","6.1.170-1",{"version":60,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":61,"version_end_type":55,"fixed_in":9},"lt6_12_85_1","6.12.85-1",{"version":63,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":64,"version_end_type":55,"fixed_in":9},"lt6_19_11_1","6.19.11-1",{"ecosystem":41,"name":66,"vendor":43,"product":66,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":66,"source":9,"versions":67},"linux-6.1",[68],{"version":69,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":70,"version_end_type":55,"fixed_in":9},"lt6_1_170_1~deb11u1","6.1.170-1~deb11u1"]