{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2023-52603", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-02T21:55:42.573Z", "datePublished": "2024-03-06T06:45:29.731Z", "dateUpdated": "2026-08-05T09:10:37.881Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:37.881Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUBSAN: array-index-out-of-bounds in dtSplitRoot\n\nSyzkaller reported the following issue:\n\noop0: detected capacity change from 0 to 32768\n\nUBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9\nindex -2 is out of range for type 'struct dtslot [128]'\nCPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nCall Trace:\n \n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106\n ubsan_epilogue lib/ubsan.c:151 [inline]\n __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283\n dtSplitRoot+0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971\n dtSplitUp fs/jfs/jfs_dtree.c:985 [inline]\n dtInsert+0x1189/0x6b80 fs/jfs/jfs_dtree.c:863\n jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270\n vfs_mkdir+0x3b3/0x590 fs/namei.c:4013\n do_mkdirat+0x279/0x550 fs/namei.c:4038\n __do_sys_mkdirat fs/namei.c:4053 [inline]\n __se_sys_mkdirat fs/namei.c:4051 [inline]\n __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fcdc0113fd9\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9\nRDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003\nRBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0\nR10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000\nR13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000\n \n\nThe issue is caused when the value of fsi becomes less than -1.\nThe check to break the loop when fsi value becomes -1 is present\nbut syzbot was able to produce value less than -1 which cause the error.\nThis patch simply add the change for the values less than 0.\n\nThe patch is tested via syzbot." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached only after locally mounting a crafted JFS block/loop image and inserting a directory entry (mkdirat → jfs_mkdir → dtInsert → dtSplitUp → dtSplitRoot); fs/jfs has no network or adjacent-protocol entry path.\nAC:L - The attacker fully controls on-disk dtroot freelist/next values, so fsi becomes <-1 and the OOB indexing of rp->slot[fsi] is deterministic with an ordinary mkdir that splits the root; no race or uncontrolled state is required.\nPR:L - As with sibling JFS crafted-image CVEs, an unprivileged local session user can attach the malicious image via udisks2/polkit/automount on desktops, kiosks, and shared workstations, then trigger the bug with ordinary mkdir requiring only write access on that filesystem.\nUI:N - The attacker supplies the image, causes it to be mounted (including via automount/udisks on their own session), and drives mkdir themselves; no separate victim action is required at exploitation time.\nS:U - The out-of-bounds access corrupts host-kernel metapage/heap memory within the same OS security authority and does not cross a VM, IOMMU, or other boundary.\nC:H - Walking a corrupted freelist indexes rp->slot[] with attacker-influenced negative/out-of-range values (syzbot: index -2), producing an unbounded out-of-bounds read of adjacent kernel metapage/heap memory that can be leveraged for disclosure (KASAN also reported slab-out-of-bounds Read in dtSplitRoot).\nI:H - After the freelist walk, f->next = n performs an out-of-bounds write into the last visited slot when that slot lies outside the valid array, yielding a kernel heap/metapage corruption write primitive suitable for control-flow hijacking.\nA:H - Syzbot reproduced UBSAN array-index-out-of-bounds in dtSplitRoot that panics under panic_on_warn, and the same wild metapage access can oops/crash the kernel without UBSAN." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/jfs/jfs_dtree.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e30b52a2ea3d1e0aaee68096957cf90a2f4ec5af", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fd3486a893778770557649fe28afa5e463d4ed07", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7aa33854477d9c346f5560a1a1fcb3fe7783e2a8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e4ce01c25ccbea02a09a5291c21749b1fc358e39", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e4cbc857d75d4e22a1f75446e7480b1f305d8d60", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "edff092a59260bf0b0a2eba219cb3da6372c2f9f", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6e2902ecc77e9760a9fc447f56d598383e2372d2", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "27e56f59bab5ddafbcfe69ad7a4a6ea1279c1b16", "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/jfs/jfs_dtree.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.307", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.269", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.210", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.149", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.77", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.16", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.4", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "2.6.12", "versionEndExcluding": "4.19.307" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.4.269" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.210" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.149" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.77" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.7.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e30b52a2ea3d1e0aaee68096957cf90a2f4ec5af" }, { "url": "https://git.kernel.org/stable/c/fd3486a893778770557649fe28afa5e463d4ed07" }, { "url": "https://git.kernel.org/stable/c/7aa33854477d9c346f5560a1a1fcb3fe7783e2a8" }, { "url": "https://git.kernel.org/stable/c/e4ce01c25ccbea02a09a5291c21749b1fc358e39" }, { "url": "https://git.kernel.org/stable/c/e4cbc857d75d4e22a1f75446e7480b1f305d8d60" }, { "url": "https://git.kernel.org/stable/c/edff092a59260bf0b0a2eba219cb3da6372c2f9f" }, { "url": "https://git.kernel.org/stable/c/6e2902ecc77e9760a9fc447f56d598383e2372d2" }, { "url": "https://git.kernel.org/stable/c/27e56f59bab5ddafbcfe69ad7a4a6ea1279c1b16" } ], "title": "UBSAN: array-index-out-of-bounds in dtSplitRoot", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-26T20:37:06.643976Z", "id": "CVE-2023-52603", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-26T20:37:16.164Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:03:21.262Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/e30b52a2ea3d1e0aaee68096957cf90a2f4ec5af", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/fd3486a893778770557649fe28afa5e463d4ed07", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/7aa33854477d9c346f5560a1a1fcb3fe7783e2a8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e4ce01c25ccbea02a09a5291c21749b1fc358e39", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e4cbc857d75d4e22a1f75446e7480b1f305d8d60", "tags": [ "x_transferred" ] }, { "url": 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