{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46035", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.093Z", "datePublished": "2026-05-27T12:56:44.260Z", "dateUpdated": "2026-05-27T12:56:44.260Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:56:44.260Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP\n\nOn UP kernels (!CONFIG_SMP), spin_trylock() is a no-op that\nunconditionally succeeds even when the lock is already held. As a\nresult, alloc_frozen_pages_nolock() called from NMI context can\nre-enter rmqueue() and acquire the zone lock that the interrupted\ncontext is already holding, corrupting the freelists.\n\nWith CONFIG_DEBUG_SPINLOCK on UP, the following BUG is triggered with\nthe slub_kunit test module:\n\n BUG: spinlock trylock failure on UP on CPU#0, kunit_try_catch/243\n [...]\n Call Trace:\n <NMI>\n dump_stack_lvl+0x3f/0x60\n do_raw_spin_trylock+0x41/0x50\n _raw_spin_trylock+0x24/0x50\n rmqueue.isra.0+0x2a9/0xa70\n get_page_from_freelist+0xeb/0x450\n alloc_frozen_pages_nolock_noprof+0x111/0x1e0\n allocate_slab+0x42a/0x500\n ___slab_alloc+0xa7/0x4c0\n kmalloc_nolock_noprof+0x164/0x310\n [...]\n </NMI>\n\nFix this by returning NULL early when invoked from NMI on a UP kernel."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/page_alloc.c"], "versions": [{"version": "d7242af8643409aae32243450341ef25b28d8a8c", "lessThan": "05b4ed8bef30bba4f559c8d835e2dd20c48cf8a4", "status": "affected", "versionType": "git"}, {"version": "d7242af8643409aae32243450341ef25b28d8a8c", "lessThan": "a6d57efeaae3f3b3656514f600eac96be713d90e", "status": "affected", "versionType": "git"}, {"version": "d7242af8643409aae32243450341ef25b28d8a8c", "lessThan": "620b46ed6ae17c8438d889c8c0cfddab36a1476c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/page_alloc.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/05b4ed8bef30bba4f559c8d835e2dd20c48cf8a4"}, {"url": "https://git.kernel.org/stable/c/a6d57efeaae3f3b3656514f600eac96be713d90e"}, {"url": "https://git.kernel.org/stable/c/620b46ed6ae17c8438d889c8c0cfddab36a1476c"}], "title": "mm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP\n\nOn UP kernels (!CONFIG_SMP), spin_trylock() is a no-op that\nunconditionally succeeds even when the lock is already held. As a\nresult, alloc_frozen_pages_nolock() called from NMI context can\nre-enter rmqueue() and acquire the zone lock that the interrupted\ncontext is already holding, corrupting the freelists.\n\nWith CONFIG_DEBUG_SPINLOCK on UP, the following BUG is triggered with\nthe slub_kunit test module:\n\n BUG: spinlock trylock failure on UP on CPU#0, kunit_try_catch/243\n [...]\n Call Trace:\n <NMI>\n dump_stack_lvl+0x3f/0x60\n do_raw_spin_trylock+0x41/0x50\n _raw_spin_trylock+0x24/0x50\n rmqueue.isra.0+0x2a9/0xa70\n get_page_from_freelist+0xeb/0x450\n alloc_frozen_pages_nolock_noprof+0x111/0x1e0\n allocate_slab+0x42a/0x500\n ___slab_alloc+0xa7/0x4c0\n kmalloc_nolock_noprof+0x164/0x310\n [...]\n </NMI>\n\nFix this by returning NULL early when invoked from NMI on a UP kernel."}], "id": "CVE-2026-46035", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:22.617", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/05b4ed8bef30bba4f559c8d835e2dd20c48cf8a4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/620b46ed6ae17c8438d889c8c0cfddab36a1476c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6d57efeaae3f3b3656514f600eac96be713d90e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: mm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP", "id": "2481918", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481918"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-413", "details": ["A flaw was found in the Linux kernel's memory management subsystem. On uniprocessor (UP) kernels, a Non-Maskable Interrupt (NMI) can cause the `alloc_frozen_pages_nolock()` function to re-enter `rmqueue()` and acquire a zone lock that is already held by an interrupted process. This can lead to corruption of the kernel's freelists, potentially causing system instability or a denial of service."], "name": "CVE-2026-46035", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46035\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46035\nhttps://lore.kernel.org/linux-cve-announce/2026052750-CVE-2026-46035-2f93@gregkh/T"], "threat_severity": "Moderate"}