{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40241", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.181Z", "datePublished": "2025-12-04T15:31:30.594Z", "dateUpdated": "2025-12-04T15:31:30.594Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-04T15:31:30.594Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix crafted invalid cases for encoded extents\n\nRobert recently reported two corrupted images that can cause system\ncrashes, which are related to the new encoded extents introduced\nin Linux 6.15:\n\n - The first one [1] has plen != 0 (e.g. plen == 0x2000000) but\n (plen & Z_EROFS_EXTENT_PLEN_MASK) == 0. It is used to represent\n special extents such as sparse extents (!EROFS_MAP_MAPPED), but\n previously only plen == 0 was handled;\n\n - The second one [2] has pa 0xffffffffffdcffed and plen 0xb4000,\n then \"cur [0xfffffffffffff000] += bvec.bv_len [0x1000]\" in\n \"} while ((cur += bvec.bv_len) < end);\" wraps around, causing an\n out-of-bound access of pcl->compressed_bvecs[] in\n z_erofs_submit_queue(). EROFS only supports 48-bit physical block\n addresses (up to 1EiB for 4k blocks), so add a sanity check to\n enforce this."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/erofs/zmap.c"], "versions": [{"version": "1d191b4ca51d73699cb127386b95ac152af2b930", "lessThan": "00d8fe0b72f4ca0a983abced36aad2160038c421", "status": "affected", "versionType": "git"}, {"version": "1d191b4ca51d73699cb127386b95ac152af2b930", "lessThan": "a429b76114aaca3ef1aff4cd469dcf025431bd11", "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/zmap.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.6", "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": "6.15", "versionEndExcluding": "6.17.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/00d8fe0b72f4ca0a983abced36aad2160038c421"}, {"url": "https://git.kernel.org/stable/c/a429b76114aaca3ef1aff4cd469dcf025431bd11"}], "title": "erofs: fix crafted invalid cases for encoded extents", "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 crafted invalid cases for encoded extents\n\nRobert recently reported two corrupted images that can cause system\ncrashes, which are related to the new encoded extents introduced\nin Linux 6.15:\n\n - The first one [1] has plen != 0 (e.g. plen == 0x2000000) but\n (plen & Z_EROFS_EXTENT_PLEN_MASK) == 0. It is used to represent\n special extents such as sparse extents (!EROFS_MAP_MAPPED), but\n previously only plen == 0 was handled;\n\n - The second one [2] has pa 0xffffffffffdcffed and plen 0xb4000,\n then \"cur [0xfffffffffffff000] += bvec.bv_len [0x1000]\" in\n \"} while ((cur += bvec.bv_len) < end);\" wraps around, causing an\n out-of-bound access of pcl->compressed_bvecs[] in\n z_erofs_submit_queue(). EROFS only supports 48-bit physical block\n addresses (up to 1EiB for 4k blocks), so add a sanity check to\n enforce this."}], "id": "CVE-2025-40241", "lastModified": "2025-12-04T17:15:08.283", "metrics": {}, "published": "2025-12-04T16:16:17.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00d8fe0b72f4ca0a983abced36aad2160038c421"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a429b76114aaca3ef1aff4cd469dcf025431bd11"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: erofs: fix crafted invalid cases for encoded extents", "id": "2418837", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418837"}, "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:\nerofs: fix crafted invalid cases for encoded extents\nRobert recently reported two corrupted images that can cause system\ncrashes, which are related to the new encoded extents introduced\nin Linux 6.15:\n- The first one [1] has plen != 0 (e.g. plen == 0x2000000) but\n(plen & Z_EROFS_EXTENT_PLEN_MASK) == 0. It is used to represent\nspecial extents such as sparse extents (!EROFS_MAP_MAPPED), but\npreviously only plen == 0 was handled;\n- The second one [2] has pa 0xffffffffffdcffed and plen 0xb4000,\nthen \"cur [0xfffffffffffff000] += bvec.bv_len [0x1000]\" in\n\"} while ((cur += bvec.bv_len) < end);\" wraps around, causing an\nout-of-bound access of pcl->compressed_bvecs[] in\nz_erofs_submit_queue(). EROFS only supports 48-bit physical block\naddresses (up to 1EiB for 4k blocks), so add a sanity check to\nenforce this."], "name": "CVE-2025-40241", "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": "Not affected", "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": "2025-12-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40241\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40241\nhttps://lore.kernel.org/linux-cve-announce/2025120403-CVE-2025-40241-c6ed@gregkh/T"], "threat_severity": "Moderate"}