CVE-2021-47340

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GFP will appear:\n\n\tstruct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap;\n\tstruct inomap *imap = JFS_IP(ipimap)->i_imap;\n\nJFS_IP() will return invalid pointer when ipimap == NULL\n\nCall Trace:\n diFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1]\n jfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154\n evict+0x2ed/0x750 fs/inode.c:578\n iput_final fs/inode.c:1654 [inline]\n iput.part.0+0x3fe/0x820 fs/inode.c:1680\n iput+0x58/0x70 fs/inode.c:1670"}, {"lang": "es", "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: jfs: corrige GPF en diFree. Evite pasar el inodo con JFS_SBI(inode->i_sb)->ipimap == NULL a diFree()[1]. Aparecer\u00e1 GFP: struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap; estructura inomap *imap = JFS_IP(ipimap)->i_imap; JFS_IP() devolver\u00e1 un puntero no v\u00e1lido cuando ipimap == NULL Seguimiento de llamadas: diFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1] jfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154 evict+0x2ed/ 0x750 fs/inode.c:578 iput_final fs/inode.c:1654 [en l\u00ednea] iput.part.0+0x3fe/0x820 fs/inode.c:1680 iput+0x58/0x70 fs/inode.c:1670"}], "id": "CVE-2021-47340", "lastModified": "2026-06-17T04:17:14.253", "metrics": {"cvssMetricV31": [{"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-2021-47340", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-23T19:05:29.527724Z", "version": "2.0.3"}}]}, "published": "2024-05-21T15:15:20.770", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3bb27e27240289b47d3466f647a55c567adbdc3a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/42f102ea1943ecb10a0756bf75424de5d1d5beed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49def1b0644892e3b113673c13d650c3060b43bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/745c9a59422c63f661f4374ed5181740db4130a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7bde24bde490f3139eee147efc6d60d6040fe975"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8018936950360f1c503bb385e158cfc5e4945d18"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d574f985fe33efd6911f4d752de6f485a1ea732"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a21e5cb1a64c904f1f0ef7b2d386fc7d2b1d2ce2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aff8d95b69051d0cf4acc3d91f22299fdbb9dfb3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3bb27e27240289b47d3466f647a55c567adbdc3a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/42f102ea1943ecb10a0756bf75424de5d1d5beed"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49def1b0644892e3b113673c13d650c3060b43bc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/745c9a59422c63f661f4374ed5181740db4130a1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7bde24bde490f3139eee147efc6d60d6040fe975"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8018936950360f1c503bb385e158cfc5e4945d18"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d574f985fe33efd6911f4d752de6f485a1ea732"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a21e5cb1a64c904f1f0ef7b2d386fc7d2b1d2ce2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aff8d95b69051d0cf4acc3d91f22299fdbb9dfb3"}], "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 GPF in diFree", "id": "2282420", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282420"}, "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 GPF in diFree\nAvoid passing inode with\nJFS_SBI(inode->i_sb)->ipimap == NULL to\ndiFree()[1]. GFP will appear:\nstruct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap;\nstruct inomap *imap = JFS_IP(ipimap)->i_imap;\nJFS_IP() will return invalid pointer when ipimap == NULL\nCall Trace:\ndiFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1]\njfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154\nevict+0x2ed/0x750 fs/inode.c:578\niput_final fs/inode.c:1654 [inline]\niput.part.0+0x3fe/0x820 fs/inode.c:1680\niput+0x58/0x70 fs/inode.c:1670", "A vulnerability was found in the Linux kernel's JFS, where the diFree function could access an invalid pointer. This occurs if a certain inode structure has a null pointer, potentially leading to system crashes or unexpected behavior when the kernel tries to manage file system metadata."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-47340", "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": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47340\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47340\nhttps://lore.kernel.org/linux-cve-announce/2024052137-CVE-2021-47340-059b@gregkh/T"], "statement": "This vulnerability is rated as a moderate severity because it can cause system crashes or instability due to invalid memory access but does not directly lead to data corruption or unauthorized access.", "threat_severity": "Moderate"}

{}