{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49993", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.387Z", "datePublished": "2025-06-18T11:00:53.487Z", "dateUpdated": "2025-06-18T11:00:53.487Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-06-18T11:00:53.487Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nloop: Check for overflow while configuring loop\n\nThe userspace can configure a loop using an ioctl call, wherein\na configuration of type loop_config is passed (see lo_ioctl()'s\ncase on line 1550 of drivers/block/loop.c). This proceeds to call\nloop_configure() which in turn calls loop_set_status_from_info()\n(see line 1050 of loop.c), passing &config->info which is of type\nloop_info64*. This function then sets the appropriate values, like\nthe offset.\n\nloop_device has lo_offset of type loff_t (see line 52 of loop.c),\nwhich is typdef-chained to long long, whereas loop_info64 has\nlo_offset of type __u64 (see line 56 of include/uapi/linux/loop.h).\n\nThe function directly copies offset from info to the device as\nfollows (See line 980 of loop.c):\n\tlo->lo_offset = info->lo_offset;\n\nThis results in an overflow, which triggers a warning in iomap_iter()\ndue to a call to iomap_iter_done() which has:\n\tWARN_ON_ONCE(iter->iomap.offset > iter->pos);\n\nThus, check for negative value during loop_set_status_from_info().\n\nBug report: https://syzkaller.appspot.com/bug?id=c620fe14aac810396d3c3edc9ad73848bf69a29e"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/loop.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "18e28817cb516b39de6281f6db9b0618b2cc7b42", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "adf0112d9b8acb03485624220b4934f69bf13369", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a217715338fd48f72114725aa7a40e484a781ca7", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b40877b8562c5720d0a7fce20729f56b75a3dede", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6858933131d0dadac071c4d33335a9ea4b8e76cf", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0455bef69028c65065f16bb04635591b2374249b", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9be7fa7ead18a48940df7b59d993bbc8b9055c15", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c490a0b5a4f36da3918181a8acdc6991d967c5f3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/loop.c"], "versions": [{"version": "4.9.327", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.292", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.312", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.274", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.140", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.64", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.6", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.9.327"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.14.292"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.19.312"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.274"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/18e28817cb516b39de6281f6db9b0618b2cc7b42"}, {"url": "https://git.kernel.org/stable/c/adf0112d9b8acb03485624220b4934f69bf13369"}, {"url": "https://git.kernel.org/stable/c/a217715338fd48f72114725aa7a40e484a781ca7"}, {"url": "https://git.kernel.org/stable/c/b40877b8562c5720d0a7fce20729f56b75a3dede"}, {"url": "https://git.kernel.org/stable/c/6858933131d0dadac071c4d33335a9ea4b8e76cf"}, {"url": "https://git.kernel.org/stable/c/0455bef69028c65065f16bb04635591b2374249b"}, {"url": "https://git.kernel.org/stable/c/9be7fa7ead18a48940df7b59d993bbc8b9055c15"}, {"url": "https://git.kernel.org/stable/c/c490a0b5a4f36da3918181a8acdc6991d967c5f3"}], "title": "loop: Check for overflow while configuring loop", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nloop: Check for overflow while configuring loop\n\nThe userspace can configure a loop using an ioctl call, wherein\na configuration of type loop_config is passed (see lo_ioctl()'s\ncase on line 1550 of drivers/block/loop.c). This proceeds to call\nloop_configure() which in turn calls loop_set_status_from_info()\n(see line 1050 of loop.c), passing &config->info which is of type\nloop_info64*. This function then sets the appropriate values, like\nthe offset.\n\nloop_device has lo_offset of type loff_t (see line 52 of loop.c),\nwhich is typdef-chained to long long, whereas loop_info64 has\nlo_offset of type __u64 (see line 56 of include/uapi/linux/loop.h).\n\nThe function directly copies offset from info to the device as\nfollows (See line 980 of loop.c):\n\tlo->lo_offset = info->lo_offset;\n\nThis results in an overflow, which triggers a warning in iomap_iter()\ndue to a call to iomap_iter_done() which has:\n\tWARN_ON_ONCE(iter->iomap.offset > iter->pos);\n\nThus, check for negative value during loop_set_status_from_info().\n\nBug report: https://syzkaller.appspot.com/bug?id=c620fe14aac810396d3c3edc9ad73848bf69a29e"}], "id": "CVE-2022-49993", "lastModified": "2025-06-18T13:46:52.973", "metrics": {}, "published": "2025-06-18T11:15:26.977", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0455bef69028c65065f16bb04635591b2374249b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18e28817cb516b39de6281f6db9b0618b2cc7b42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6858933131d0dadac071c4d33335a9ea4b8e76cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9be7fa7ead18a48940df7b59d993bbc8b9055c15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a217715338fd48f72114725aa7a40e484a781ca7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/adf0112d9b8acb03485624220b4934f69bf13369"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b40877b8562c5720d0a7fce20729f56b75a3dede"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c490a0b5a4f36da3918181a8acdc6991d967c5f3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: loop: Check for overflow while configuring loop", "id": "2373444", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373444"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nloop: Check for overflow while configuring loop\nThe userspace can configure a loop using an ioctl call, wherein\na configuration of type loop_config is passed (see lo_ioctl()'s\ncase on line 1550 of drivers/block/loop.c). This proceeds to call\nloop_configure() which in turn calls loop_set_status_from_info()\n(see line 1050 of loop.c), passing &config->info which is of type\nloop_info64*. This function then sets the appropriate values, like\nthe offset.\nloop_device has lo_offset of type loff_t (see line 52 of loop.c),\nwhich is typdef-chained to long long, whereas loop_info64 has\nlo_offset of type __u64 (see line 56 of include/uapi/linux/loop.h).\nThe function directly copies offset from info to the device as\nfollows (See line 980 of loop.c):\nlo->lo_offset = info->lo_offset;\nThis results in an overflow, which triggers a warning in iomap_iter()\ndue to a call to iomap_iter_done() which has:\nWARN_ON_ONCE(iter->iomap.offset > iter->pos);\nThus, check for negative value during loop_set_status_from_info().\nBug report: https://syzkaller.appspot.com/bug?id=c620fe14aac810396d3c3edc9ad73848bf69a29e"], "name": "CVE-2022-49993", "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": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49993\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49993\nhttps://lore.kernel.org/linux-cve-announce/2025061825-CVE-2022-49993-f53f@gregkh/T"], "threat_severity": "Moderate"}