{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-54069", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54069", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-12-24T12:23:13.504Z", "updatedAt": "2026-05-23T15:32:21.855Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ext4: fix BUG in ext4_mb_new_inode_pa() due to overflow", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix BUG in ext4_mb_new_inode_pa() due to overflow\n\nWhen we calculate the end position of ext4_free_extent, this position may\nbe exactly where ext4_lblk_t (i.e. uint) overflows. For example, if\nac_g_ex.fe_logical is 4294965248 and ac_orig_goal_len is 2048, then the\ncomputed end is 0x100000000, which is 0. If ac->ac_o_ex.fe_logical is not\nthe first case of adjusting the best extent, that is, new_bex_end > 0, the\nfollowing BUG_ON will be triggered:\n\n=========================================================\nkernel BUG at fs/ext4/mballoc.c:5116!\ninvalid opcode: 0000 [#1] PREEMPT SMP PTI\nCPU: 3 PID: 673 Comm: xfs_io Tainted: G E 6.5.0-rc1+ #279\nRIP: 0010:ext4_mb_new_inode_pa+0xc5/0x430\nCall Trace:\n \n ext4_mb_use_best_found+0x203/0x2f0\n ext4_mb_try_best_found+0x163/0x240\n ext4_mb_regular_allocator+0x158/0x1550\n ext4_mb_new_blocks+0x86a/0xe10\n ext4_ext_map_blocks+0xb0c/0x13a0\n ext4_map_blocks+0x2cd/0x8f0\n ext4_iomap_begin+0x27b/0x400\n iomap_iter+0x222/0x3d0\n __iomap_dio_rw+0x243/0xcb0\n iomap_dio_rw+0x16/0x80\n=========================================================\n\nA simple reproducer demonstrating the problem:\n\n\tmkfs.ext4 -F /dev/sda -b 4096 100M\n\tmount /dev/sda /tmp/test\n\tfallocate -l1M /tmp/test/tmp\n\tfallocate -l10M /tmp/test/file\n\tfallocate -i -o 1M -l16777203M /tmp/test/file\n\tfsstress -d /tmp/test -l 0 -n 100000 -p 8 &\n\tsleep 10 && killall -9 fsstress\n\trm -f /tmp/test/tmp\n\txfs_io -c \"open -ad /tmp/test/file\" -c \"pwrite -S 0xff 0 8192\"\n\nWe simply refactor the logic for adjusting the best extent by adding\na temporary ext4_free_extent ex and use extent_logical_end() to avoid\noverflow, which also simplifies the code.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "8659c5f4ffaacbe932849b98462c3d635b4eacea", "status": "affected", "versionType": "git", "lessThan": "83ecffd40c65844a73c2e93d7c841455786605ac" }, { "version": "fc7237e191b99f88e859316fab2b06c2c26c8344", "status": "affected", "versionType": "git", "lessThan": "58fe961c606c446f5612f6897827b1cac42c2e89" }, { "version": "613f6cde5ebb005a37fda117cdda7b4126170c13", "status": "affected", "versionType": "git", "lessThan": "f2c3a3aa6f11ad9878dbc3a067b0633e07b586c1" }, { "version": "9d4430b7f862ce8835ca4e054b6916d15c8e0862", "status": "affected", "versionType": "git", "lessThan": "fcefddf3a151b2c416b20120c06bb1ba9ad676fb" }, { "version": "93cdf49f6eca5e23f6546b8f28457b2e6a6961d9", "status": "affected", "versionType": "git", "lessThan": "b7e9ec38b6a0beb5a49cd1e76be0a9a07c218e90" }, { "version": "93cdf49f6eca5e23f6546b8f28457b2e6a6961d9", "status": "affected", "versionType": "git", "lessThan": "bc056e7163ac7db945366de219745cf94f32a3e6" }, { "version": "46772ab99409cc72241227dd8f5295f358233fda", "status": "affected", "versionType": "git" }, { "version": "25a60b4533268477920faaeebd99e7e69c0735cd", "status": "affected", "versionType": "git" }, { "version": "cec4ef62b36b04e0bc8905732adab091f4bc1cfd", "status": "affected", "versionType": "git" }, { "version": "5.4.244", "status": "affected", "versionType": "semver", "lessThan": "5.4.260" }, { "version": "5.10.181", "status": "affected", "versionType": "semver", "lessThan": "5.10.200" }, { "version": "5.15.113", "status": "affected", "versionType": "semver", "lessThan": "5.15.138" }, { "version": "6.1.30", "status": "affected", "versionType": "semver", "lessThan": "6.1.61" }, { "version": "4.14.316", "status": "affected", "versionType": "semver", "lessThan": "4.15" }, { "version": "4.19.284", "status": "affected", "versionType": "semver", "lessThan": "4.20" }, { "version": "6.3.4", "status": "affected", "versionType": "semver", "lessThan": "6.4" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.4" }, { "version": "5.4.260", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.200", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.138", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.61", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.5.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.5.*" }, { "version": "6.6", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }