{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40147", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.175Z", "datePublished": "2025-11-12T10:23:26.556Z", "dateUpdated": "2025-12-01T06:18:55.786Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-01T06:18:55.786Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-throttle: fix access race during throttle policy activation\n\nOn repeated cold boots we occasionally hit a NULL pointer crash in\nblk_should_throtl() when throttling is consulted before the throttle\npolicy is fully enabled for the queue. Checking only q->td != NULL is\ninsufficient during early initialization, so blkg_to_pd() for the\nthrottle policy can still return NULL and blkg_to_tg() becomes NULL,\nwhich later gets dereferenced.\n\n Unable to handle kernel NULL pointer dereference\n at virtual address 0000000000000156\n ...\n pc : submit_bio_noacct+0x14c/0x4c8\n lr : submit_bio_noacct+0x48/0x4c8\n sp : ffff800087f0b690\n x29: ffff800087f0b690 x28: 0000000000005f90 x27: ffff00068af393c0\n x26: 0000000000080000 x25: 000000000002fbc0 x24: ffff000684ddcc70\n x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000\n x20: 0000000000080000 x19: ffff000684ddcd08 x18: ffffffffffffffff\n x17: 0000000000000000 x16: ffff80008132a550 x15: 0000ffff98020fff\n x14: 0000000000000000 x13: 1fffe000d11d7021 x12: ffff000688eb810c\n x11: ffff00077ec4bb80 x10: ffff000688dcb720 x9 : ffff80008068ef60\n x8 : 00000a6fb8a86e85 x7 : 000000000000111e x6 : 0000000000000002\n x5 : 0000000000000246 x4 : 0000000000015cff x3 : 0000000000394500\n x2 : ffff000682e35e40 x1 : 0000000000364940 x0 : 000000000000001a\n Call trace:\n submit_bio_noacct+0x14c/0x4c8\n verity_map+0x178/0x2c8\n __map_bio+0x228/0x250\n dm_submit_bio+0x1c4/0x678\n __submit_bio+0x170/0x230\n submit_bio_noacct_nocheck+0x16c/0x388\n submit_bio_noacct+0x16c/0x4c8\n submit_bio+0xb4/0x210\n f2fs_submit_read_bio+0x4c/0xf0\n f2fs_mpage_readpages+0x3b0/0x5f0\n f2fs_readahead+0x90/0xe8\n\nTighten blk_throtl_activated() to also require that the throttle policy\nbit is set on the queue:\n\n return q->td != NULL &&\n test_bit(blkcg_policy_throtl.plid, q->blkcg_pols);\n\nThis prevents blk_should_throtl() from accessing throttle group state\nuntil policy data has been attached to blkgs."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-cgroup.c", "block/blk-cgroup.h", "block/blk-throttle.c", "block/blk-throttle.h"], "versions": [{"version": "a3166c51702bb00b8f8b84022090cbab8f37be1a", "lessThan": "6a0c394300a7b0c05504596685de8a46707171fc", "status": "affected", "versionType": "git"}, {"version": "a3166c51702bb00b8f8b84022090cbab8f37be1a", "lessThan": "bd9fd5be6bc0836820500f68fff144609fbd85a9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-cgroup.c", "block/blk-cgroup.h", "block/blk-throttle.c", "block/blk-throttle.h"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.3", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "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": "6.10", "versionEndExcluding": "6.17.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6a0c394300a7b0c05504596685de8a46707171fc"}, {"url": "https://git.kernel.org/stable/c/bd9fd5be6bc0836820500f68fff144609fbd85a9"}], "title": "blk-throttle: fix access race during throttle policy activation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-throttle: fix access race during throttle policy activation\n\nOn repeated cold boots we occasionally hit a NULL pointer crash in\nblk_should_throtl() when throttling is consulted before the throttle\npolicy is fully enabled for the queue. Checking only q->td != NULL is\ninsufficient during early initialization, so blkg_to_pd() for the\nthrottle policy can still return NULL and blkg_to_tg() becomes NULL,\nwhich later gets dereferenced.\n\n Unable to handle kernel NULL pointer dereference\n at virtual address 0000000000000156\n ...\n pc : submit_bio_noacct+0x14c/0x4c8\n lr : submit_bio_noacct+0x48/0x4c8\n sp : ffff800087f0b690\n x29: ffff800087f0b690 x28: 0000000000005f90 x27: ffff00068af393c0\n x26: 0000000000080000 x25: 000000000002fbc0 x24: ffff000684ddcc70\n x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000\n x20: 0000000000080000 x19: ffff000684ddcd08 x18: ffffffffffffffff\n x17: 0000000000000000 x16: ffff80008132a550 x15: 0000ffff98020fff\n x14: 0000000000000000 x13: 1fffe000d11d7021 x12: ffff000688eb810c\n x11: ffff00077ec4bb80 x10: ffff000688dcb720 x9 : ffff80008068ef60\n x8 : 00000a6fb8a86e85 x7 : 000000000000111e x6 : 0000000000000002\n x5 : 0000000000000246 x4 : 0000000000015cff x3 : 0000000000394500\n x2 : ffff000682e35e40 x1 : 0000000000364940 x0 : 000000000000001a\n Call trace:\n submit_bio_noacct+0x14c/0x4c8\n verity_map+0x178/0x2c8\n __map_bio+0x228/0x250\n dm_submit_bio+0x1c4/0x678\n __submit_bio+0x170/0x230\n submit_bio_noacct_nocheck+0x16c/0x388\n submit_bio_noacct+0x16c/0x4c8\n submit_bio+0xb4/0x210\n f2fs_submit_read_bio+0x4c/0xf0\n f2fs_mpage_readpages+0x3b0/0x5f0\n f2fs_readahead+0x90/0xe8\n\nTighten blk_throtl_activated() to also require that the throttle policy\nbit is set on the queue:\n\n return q->td != NULL &&\n test_bit(blkcg_policy_throtl.plid, q->blkcg_pols);\n\nThis prevents blk_should_throtl() from accessing throttle group state\nuntil policy data has been attached to blkgs."}], "id": "CVE-2025-40147", "lastModified": "2025-11-12T16:19:12.850", "metrics": {}, "published": "2025-11-12T11:15:44.600", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a0c394300a7b0c05504596685de8a46707171fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bd9fd5be6bc0836820500f68fff144609fbd85a9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: blk-throttle: fix access race during throttle policy activation", "id": "2414463", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414463"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblk-throttle: fix access race during throttle policy activation\nOn repeated cold boots we occasionally hit a NULL pointer crash in\nblk_should_throtl() when throttling is consulted before the throttle\npolicy is fully enabled for the queue. Checking only q->td != NULL is\ninsufficient during early initialization, so blkg_to_pd() for the\nthrottle policy can still return NULL and blkg_to_tg() becomes NULL,\nwhich later gets dereferenced.\nUnable to handle kernel NULL pointer dereference\nat virtual address 0000000000000156\n...\npc : submit_bio_noacct+0x14c/0x4c8\nlr : submit_bio_noacct+0x48/0x4c8\nsp : ffff800087f0b690\nx29: ffff800087f0b690 x28: 0000000000005f90 x27: ffff00068af393c0\nx26: 0000000000080000 x25: 000000000002fbc0 x24: ffff000684ddcc70\nx23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000\nx20: 0000000000080000 x19: ffff000684ddcd08 x18: ffffffffffffffff\nx17: 0000000000000000 x16: ffff80008132a550 x15: 0000ffff98020fff\nx14: 0000000000000000 x13: 1fffe000d11d7021 x12: ffff000688eb810c\nx11: ffff00077ec4bb80 x10: ffff000688dcb720 x9 : ffff80008068ef60\nx8 : 00000a6fb8a86e85 x7 : 000000000000111e x6 : 0000000000000002\nx5 : 0000000000000246 x4 : 0000000000015cff x3 : 0000000000394500\nx2 : ffff000682e35e40 x1 : 0000000000364940 x0 : 000000000000001a\nCall trace:\nsubmit_bio_noacct+0x14c/0x4c8\nverity_map+0x178/0x2c8\n__map_bio+0x228/0x250\ndm_submit_bio+0x1c4/0x678\n__submit_bio+0x170/0x230\nsubmit_bio_noacct_nocheck+0x16c/0x388\nsubmit_bio_noacct+0x16c/0x4c8\nsubmit_bio+0xb4/0x210\nf2fs_submit_read_bio+0x4c/0xf0\nf2fs_mpage_readpages+0x3b0/0x5f0\nf2fs_readahead+0x90/0xe8\nTighten blk_throtl_activated() to also require that the throttle policy\nbit is set on the queue:\nreturn q->td != NULL &&\ntest_bit(blkcg_policy_throtl.plid, q->blkcg_pols);\nThis prevents blk_should_throtl() from accessing throttle group state\nuntil policy data has been attached to blkgs."], "name": "CVE-2025-40147", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-11-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40147\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40147\nhttps://lore.kernel.org/linux-cve-announce/2025111257-CVE-2025-40147-0afa@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-11-12T22:12:20.747471+00:00", "updated": "2025-11-12T22:12:20.747530+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}