{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50743", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T13:02:21.543Z", "datePublished": "2025-12-24T13:05:40.297Z", "dateUpdated": "2025-12-24T13:05:40.297Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-24T13:05:40.297Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: Fix pcluster memleak when its block address is zero\n\nsyzkaller reported a memleak:\nhttps://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed\n\nunreferenced object 0xffff88811009c7f8 (size 136):\n ...\n backtrace:\n [<ffffffff821db19b>] z_erofs_do_read_page+0x99b/0x1740\n [<ffffffff821dee9e>] z_erofs_readahead+0x24e/0x580\n [<ffffffff814bc0d6>] read_pages+0x86/0x3d0\n ...\n\nsyzkaller constructed a case: in z_erofs_register_pcluster(),\nztailpacking = false and map->m_pa = zero. This makes pcl->obj.index be\nzero although pcl is not a inline pcluster.\n\nThen following path adds refcount for grp, but the refcount won't be put\nbecause pcl is inline.\n\nz_erofs_readahead()\n z_erofs_do_read_page() # for another page\n z_erofs_collector_begin()\n erofs_find_workgroup()\n erofs_workgroup_get()\n\nSince it's illegal for the block address of a non-inlined pcluster to\nbe zero, add check here to avoid registering the pcluster which would\nbe leaked."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/erofs/zdata.c"], "versions": [{"version": "cecf864d3d76d50e3d9c58145e286a0b8c284e92", "lessThan": "ac54c1f7b288d83b6ba1e320efff24ecc21309cd", "status": "affected", "versionType": "git"}, {"version": "cecf864d3d76d50e3d9c58145e286a0b8c284e92", "lessThan": "618e712b99c78d1004b70a1a9ab0a4830d0b2673", "status": "affected", "versionType": "git"}, {"version": "cecf864d3d76d50e3d9c58145e286a0b8c284e92", "lessThan": "c42c0ffe81176940bd5dead474216b7198d77675", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/erofs/zdata.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "5.17", "versionEndExcluding": "6.0.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ac54c1f7b288d83b6ba1e320efff24ecc21309cd"}, {"url": "https://git.kernel.org/stable/c/618e712b99c78d1004b70a1a9ab0a4830d0b2673"}, {"url": "https://git.kernel.org/stable/c/c42c0ffe81176940bd5dead474216b7198d77675"}], "title": "erofs: Fix pcluster memleak when its block address is zero", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: Fix pcluster memleak when its block address is zero\n\nsyzkaller reported a memleak:\nhttps://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed\n\nunreferenced object 0xffff88811009c7f8 (size 136):\n ...\n backtrace:\n [<ffffffff821db19b>] z_erofs_do_read_page+0x99b/0x1740\n [<ffffffff821dee9e>] z_erofs_readahead+0x24e/0x580\n [<ffffffff814bc0d6>] read_pages+0x86/0x3d0\n ...\n\nsyzkaller constructed a case: in z_erofs_register_pcluster(),\nztailpacking = false and map->m_pa = zero. This makes pcl->obj.index be\nzero although pcl is not a inline pcluster.\n\nThen following path adds refcount for grp, but the refcount won't be put\nbecause pcl is inline.\n\nz_erofs_readahead()\n z_erofs_do_read_page() # for another page\n z_erofs_collector_begin()\n erofs_find_workgroup()\n erofs_workgroup_get()\n\nSince it's illegal for the block address of a non-inlined pcluster to\nbe zero, add check here to avoid registering the pcluster which would\nbe leaked."}], "id": "CVE-2022-50743", "lastModified": "2025-12-24T13:16:01.020", "metrics": {}, "published": "2025-12-24T13:16:01.020", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/618e712b99c78d1004b70a1a9ab0a4830d0b2673"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ac54c1f7b288d83b6ba1e320efff24ecc21309cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c42c0ffe81176940bd5dead474216b7198d77675"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}