CVE-2024-44939

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This will cause the\npreviously true judgment \"p->header.flag & BT-LEAF\" to change to no after writing\nthe name operation, this leads to entering an incorrect branch and accessing the\nuninitialized object ih when judging this condition for the second time.\n\n[Fix]\nAfter got the page, check freelist first, if freelist == 0 then exit dtInsert()\nand return -EINVAL."}], "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 vulnerable path is reached only through local directory-modifying syscalls (creat/mkdir/link/symlink/mknod/rename) on a mounted JFS volume; there is no network-facing consumer of jfs_dtree.c.\nAC:L - Fully deterministic \u2014 a directory page crafted with header.freelist==0 and freecnt>=1 passes the era's DT_GETPAGE sanity checks, and a single file creation with an attacker-chosen name reliably reaches the aliased slot[0] write; no race and no memory-layout dependency.\nPR:L - Any unprivileged local user with write access to a directory on the mounted crafted volume triggers it via an ordinary creat()/mkdir(); dtInsert() performs no capability or credential check on the path from jfs_create()/jfs_mkdir().\nUI:N - Once the untrusted JFS volume is mounted (kiosk/shared removable media automount, admin-mounted image, or a container/VM handed a JFS disk), the attacker triggers the bug entirely on their own with a single syscall \u2014 no victim action at attack time.\nS:U - The corruption and crash are confined to the kernel's own memory and the JFS metadata it manages; no VM, IOMMU, or other security-authority boundary is crossed.\nC:H - The overwritten header leaves stblindex/maxslot/nextindex and the self PXD attacker-controlled, so subsequent p->slot[stbl[i]] and p->slot[next] accesses in dtSearch/jfs_readdir read out of bounds and return adjacent kernel heap bytes \u2014 and arbitrary disk blocks via the poisoned self PXD fed to add_index() \u2014 to userspace as dirent names and inode numbers.\nI:H - Attacker-chosen bytes (inode number, UTF-16LE filename, dir index) are written over the dtree page header, which is already dirtied and linelocked so the corruption is journaled to disk, and the resulting attacker-controlled s8 slot indices yield out-of-bounds heap writes on this and subsequent directory operations.\nA:H - The reported and readily reproduced outcome is a general protection fault writing to NULL+8 in dtInsertEntry(), an immediate kernel oops; the corrupted directory page also causes further faults on later access."}]}], "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": "f98bf80b20f4a930589cda48a35f751a64fe0dc2", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "53023ab11836ac56fd75f7a71ec1356e50920fa9", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6ea10dbb1e6c58384136e9adfd75f81951e423f6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9c2ac38530d1a3ee558834dfa16c85a40fd0e702", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ce6dede912f064a855acf6f04a04cbb2c25b8c8c", "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": "5.15.189", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.107", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.47", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.6", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "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": "5.15.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.107"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.47"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.10.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f98bf80b20f4a930589cda48a35f751a64fe0dc2"}, {"url": "https://git.kernel.org/stable/c/53023ab11836ac56fd75f7a71ec1356e50920fa9"}, {"url": "https://git.kernel.org/stable/c/6ea10dbb1e6c58384136e9adfd75f81951e423f6"}, {"url": "https://git.kernel.org/stable/c/9c2ac38530d1a3ee558834dfa16c85a40fd0e702"}, {"url": "https://git.kernel.org/stable/c/ce6dede912f064a855acf6f04a04cbb2c25b8c8c"}], "title": "jfs: fix null ptr deref in dtInsertEntry", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-44939", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:27:35.487089Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:06.654Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:13:44.114Z"}}]}}

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there is no network-facing consumer of jfs_dtree.c.\nAC:L - Fully deterministic \u2014 a directory page crafted with header.freelist==0 and freecnt>=1 passes the era's DT_GETPAGE sanity checks, and a single file creation with an attacker-chosen name reliably reaches the aliased slot[0] write; no race and no memory-layout dependency.\nPR:L - Any unprivileged local user with write access to a directory on the mounted crafted volume triggers it via an ordinary creat()/mkdir(); dtInsert() performs no capability or credential check on the path from jfs_create()/jfs_mkdir().\nUI:N - Once the untrusted JFS volume is mounted (kiosk/shared removable media automount, admin-mounted image, or a container/VM handed a JFS disk), the attacker triggers the bug entirely on their own with a single syscall \u2014 no victim action at attack time.\nS:U - The corruption and crash are confined to the kernel's own memory and the JFS metadata it manages; no VM, IOMMU, or other security-authority boundary is crossed.\nC:H - The overwritten header leaves stblindex/maxslot/nextindex and the self PXD attacker-controlled, so subsequent p->slot[stbl[i]] and p->slot[next] accesses in dtSearch/jfs_readdir read out of bounds and return adjacent kernel heap bytes \u2014 and arbitrary disk blocks via the poisoned self PXD fed to add_index() \u2014 to userspace as dirent names and inode numbers.\nI:H - Attacker-chosen bytes (inode number, UTF-16LE filename, dir index) are written over the dtree page header, which is already dirtied and linelocked so the corruption is journaled to disk, and the resulting attacker-controlled s8 slot indices yield out-of-bounds heap writes on this and subsequent directory operations.\nA:H - The reported and readily reproduced outcome is a general protection fault writing to NULL+8 in dtInsertEntry(), an immediate kernel oops; the corrupted directory page also causes further faults on later access."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f98bf80b20f4a930589cda48a35f751a64fe0dc2", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "53023ab11836ac56fd75f7a71ec1356e50920fa9", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6ea10dbb1e6c58384136e9adfd75f81951e423f6", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9c2ac38530d1a3ee558834dfa16c85a40fd0e702", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ce6dede912f064a855acf6f04a04cbb2c25b8c8c", "versionType": "git"}], "programFiles": ["fs/jfs/jfs_dtree.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.189", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.107", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.47", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.10.6", "versionType": "semver", "lessThanOrEqual": "6.10.*"}, {"status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/jfs/jfs_dtree.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/f98bf80b20f4a930589cda48a35f751a64fe0dc2"}, {"url": "https://git.kernel.org/stable/c/53023ab11836ac56fd75f7a71ec1356e50920fa9"}, {"url": "https://git.kernel.org/stable/c/6ea10dbb1e6c58384136e9adfd75f81951e423f6"}, {"url": "https://git.kernel.org/stable/c/9c2ac38530d1a3ee558834dfa16c85a40fd0e702"}, {"url": "https://git.kernel.org/stable/c/ce6dede912f064a855acf6f04a04cbb2c25b8c8c"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: fix null ptr deref in dtInsertEntry\n\n[syzbot reported]\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nRIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713\n...\n[Analyze]\nIn dtInsertEntry(), when the pointer h has the same value as p, after writing\nname in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the\npreviously true judgment \"p->header.flag & BT-LEAF\" to change to no after writing\nthe name operation, this leads to entering an incorrect branch and accessing the\nuninitialized object ih when judging this condition for the second time.\n\n[Fix]\nAfter got the page, check freelist first, if freelist == 0 then exit dtInsert()\nand return -EINVAL."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.189", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.107", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.47", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.10.6", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11", "versionStartIncluding": "2.6.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:37:08.416Z"}}}, "cveMetadata": {"cveId": "CVE-2024-44939", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:37:08.416Z", "dateReserved": "2024-08-21T05:34:56.664Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-08-26T11:20:44.129Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/jfs/jfs_dtree.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f98bf80b20f4a930589cda48a35f751a64fe0dc2", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "53023ab11836ac56fd75f7a71ec1356e50920fa9", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "6ea10dbb1e6c58384136e9adfd75f81951e423f6", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "9c2ac38530d1a3ee558834dfa16c85a40fd0e702", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "ce6dede912f064a855acf6f04a04cbb2c25b8c8c", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/jfs/jfs_dtree.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"lessThan": "2.6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.189", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.107", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.47", "versionType": "semver"}, {"lessThanOrEqual": "6.10.*", "status": "unaffected", "version": "6.10.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CF4F8EA7-C643-4B9C-8E32-BD81930A5E8B", "versionEndExcluding": "6.6.47", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C1CDF130-CCA6-47F6-9718-8949BF4E05CC", "versionEndExcluding": "6.10.6", "versionStartIncluding": "6.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: fix null ptr deref in dtInsertEntry\n\n[syzbot reported]\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nRIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713\n...\n[Analyze]\nIn dtInsertEntry(), when the pointer h has the same value as p, after writing\nname in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the\npreviously true judgment \"p->header.flag & BT-LEAF\" to change to no after writing\nthe name operation, this leads to entering an incorrect branch and accessing the\nuninitialized object ih when judging this condition for the second time.\n\n[Fix]\nAfter got the page, check freelist first, if freelist == 0 then exit dtInsert()\nand return -EINVAL."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: jfs: corrige null ptr deref en dtInsertEntry [syzbot inform\u00f3] falla de protecci\u00f3n general, probablemente para direcci\u00f3n no can\u00f3nica 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr -deref en rango [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5061 Comm: syz-executor404 No contaminado 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 03 /27 /2024 RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 ... [Analizar] En dtInsertEntry(), cuando el puntero h tiene el mismo valor que p, despu\u00e9s de escribir el nombre en UniStrncpy_to_le(), Se borrar\u00e1 p->header.flag. Esto har\u00e1 que el juicio previamente verdadero \"p->header.flag & BT-LEAF\" cambie a no despu\u00e9s de escribir la operaci\u00f3n de nombre, esto lleva a ingresar una rama incorrecta y acceder al objeto no inicializado ih al juzgar esta condici\u00f3n por segunda vez. [Soluci\u00f3n] Despu\u00e9s de obtener la p\u00e1gina, verifique primero la lista libre, si lista libre == 0, salga de dtInsert() y devuelva -EINVAL."}], "id": "CVE-2024-44939", "lastModified": "2026-08-04T11:20:01.000", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-44939", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:27:35.487089Z", "version": "2.0.3"}}]}, "published": "2024-08-26T12:15:06.007", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/53023ab11836ac56fd75f7a71ec1356e50920fa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6ea10dbb1e6c58384136e9adfd75f81951e423f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9c2ac38530d1a3ee558834dfa16c85a40fd0e702"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce6dede912f064a855acf6f04a04cbb2c25b8c8c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f98bf80b20f4a930589cda48a35f751a64fe0dc2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: jfs: fix null ptr deref in dtInsertEntry", "id": "2307898", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2307898"}, "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"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\njfs: fix null ptr deref in dtInsertEntry\n[syzbot reported]\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nRIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713\n...\n[Analyze]\nIn dtInsertEntry(), when the pointer h has the same value as p, after writing\nname in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the\npreviously true judgment \"p->header.flag & BT-LEAF\" to change to no after writing\nthe name operation, this leads to entering an incorrect branch and accessing the\nuninitialized object ih when judging this condition for the second time.\n[Fix]\nAfter got the page, check freelist first, if freelist == 0 then exit dtInsert()\nand return -EINVAL."], "name": "CVE-2024-44939", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "2024-08-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-44939\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-44939\nhttps://lore.kernel.org/linux-cve-announce/2024082619-CVE-2024-44939-cf96@gregkh/T"], "threat_severity": "Low"}

{}