CVE-2024-39276

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fs/mbcache.c:419\nCall Trace:\n <TASK>\n ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375\n generic_shutdown_super+0x136/0x2d0 fs/super.c:641\n kill_block_super+0x44/0x90 fs/super.c:1675\n ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327\n[...]\n============================================\n\nThis is because when finding an entry in ext4_xattr_block_cache_find(), if\next4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown\nin the __entry_find(), won't be put away, and eventually trigger the above\nissue in mb_cache_destroy() due to reference count leakage.\n\nSo call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/xattr.c"], "versions": [{"version": "b878c8a7f08f0c225b6a46ba1ac867e9c5d17807", "lessThan": "9ad75e78747b5a50dc5a52f0f8e92e920a653f16", "status": "affected", 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"fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "lessThan": "0c0b4a49d3e7f49690a6827a41faeffad5df7e21", "status": "affected", "versionType": "git"}, {"version": "9da1f6d06b7a6d068e68fcfd7cbbf6b586d888e1", "status": "affected", "versionType": "git"}, {"version": "81313ed2c705d958744882a269bf4a5e3ddec95e", "status": "affected", "versionType": "git"}, {"version": "4.19.14", "lessThan": "4.19.316", "status": "affected", "versionType": "semver"}, {"version": "4.14.92", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.20.1", "lessThan": "4.21", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/xattr.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.316", "lessThanOrEqual": "4.19.*", 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"lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.9.5", "versionType": "semver", "lessThanOrEqual": "6.9.*"}, {"status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ext4/xattr.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16"}, {"url": "https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483"}, {"url": "https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb"}, {"url": "https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e"}, {"url": "https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9"}, {"url": "https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577"}, {"url": "https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8"}, {"url": 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-ENOMEM, the ce's e_refcnt, which has already grown\nin the __entry_find(), won't be put away, and eventually trigger the above\nissue in mb_cache_destroy() due to reference count leakage.\n\nSo call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.316", "versionStartIncluding": "4.19.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.278", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.219", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.161", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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"2026-05-23T15:49:57.161Z", "dateReserved": "2024-06-24T13:53:25.552Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-06-25T14:22:38.886Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ext4/xattr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9ad75e78747b5a50dc5a52f0f8e92e920a653f16", "status": "affected", "version": "b878c8a7f08f0c225b6a46ba1ac867e9c5d17807", "versionType": "git"}, {"lessThan": "896a7e7d0d555ad8b2b46af0c2fa7de7467f9483", "status": "affected", "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "versionType": "git"}, {"lessThan": "76dc776153a47372719d664e0fc50d6355791abb", "status": "affected", "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "versionType": "git"}, {"lessThan": "681ff9a09accd8a4379f8bd30b7a1641ee19bb3e", "status": "affected", "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "versionType": "git"}, {"lessThan": "e941b712e758f615d311946bf98216e79145ccd9", "status": "affected", "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "versionType": "git"}, {"lessThan": "a95df6f04f2c37291adf26a74205cde0314d4577", "status": "affected", "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "versionType": "git"}, {"lessThan": "b37c0edef4e66fb21a2fbc211471195a383e5ab8", "status": "affected", "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "versionType": "git"}, {"lessThan": "0c0b4a49d3e7f49690a6827a41faeffad5df7e21", "status": "affected", "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592", "versionType": "git"}, {"status": "affected", "version": "9da1f6d06b7a6d068e68fcfd7cbbf6b586d888e1", "versionType": "git"}, {"status": "affected", "version": "81313ed2c705d958744882a269bf4a5e3ddec95e", "versionType": "git"}, {"lessThan": "4.19.316", "status": "affected", "version": "4.19.14", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.92", "versionType": "semver"}, {"lessThan": "4.21", "status": "affected", "version": "4.20.1", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ext4/xattr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"lessThan": "5.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.316", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.278", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.219", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.161", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.94", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.34", "versionType": "semver"}, {"lessThanOrEqual": "6.9.*", "status": "unaffected", "version": "6.9.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "38A1AC7C-17D5-4E10-97A0-ED3637CD9D40", "versionEndExcluding": "4.15", "versionStartIncluding": "4.14.92", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9D80577F-74E8-4C87-98A7-61C606F151C7", "versionEndExcluding": "4.19.316", "versionStartIncluding": "4.19.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C8683351-F896-4801-B122-7630EDC16D33", "versionEndIncluding": "5.4.278", "versionStartIncluding": "4.20.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5139AC66-7FA9-468C-87BF-E5F0211B3245", "versionEndIncluding": "5.15.161", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A7DD4E64-08E3-4E97-A0BC-E5AB4061FECE", "versionEndIncluding": "6.1.94", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CBCA000B-266D-478D-AB4F-5AD9EE086ABE", "versionEndIncluding": "6.6.34", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A27A2251-6634-4A3B-82F4-5C6D12B07127", "versionEndIncluding": "6.9.5", "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\next4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()\n\nSyzbot reports a warning as follows:\n\n============================================\nWARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290\nModules linked in:\nCPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7\nRIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419\nCall Trace:\n <TASK>\n ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375\n generic_shutdown_super+0x136/0x2d0 fs/super.c:641\n kill_block_super+0x44/0x90 fs/super.c:1675\n ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327\n[...]\n============================================\n\nThis is because when finding an entry in ext4_xattr_block_cache_find(), if\next4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown\nin the __entry_find(), won't be put away, and eventually trigger the above\nissue in mb_cache_destroy() due to reference count leakage.\n\nSo call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: soluciona la fuga de e_refcnt de mb_cache_entry en ext4_xattr_block_cache_find() Syzbot informa una advertencia de la siguiente manera: ======================= ======================= ADVERTENCIA: CPU: 0 PID: 5075 en fs/mbcache.c:419 mb_cache_destroy+0x224/0x290 M\u00f3dulos vinculados en: CPU: 0 PID: 5075 Comm: syz-executor199 No contaminado 6.9.0-rc6-gb947cc5bf6d7 RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419 Seguimiento de llamadas: ext4_put_super+0x6d4/0xcd0 fs/ext4/super .c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327 [...] === ========================================= Esto se debe a que al encontrar una entrada en ext4_xattr_block_cache_find (), si ext4_sb_bread() devuelve -ENOMEM, el e_refcnt del ce, que ya ha crecido en __entry_find(), no se guardar\u00e1 y, eventualmente, desencadenar\u00e1 el problema anterior en mb_cache_destroy() debido a una fuga del recuento de referencias. Entonces llame a mb_cache_entry_put() en la rama de error -ENOMEM como soluci\u00f3n r\u00e1pida."}], "id": "CVE-2024-39276", "lastModified": "2026-06-17T07:41:37.247", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-39276", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-25T15:26:44.344702Z", "version": "2.0.3"}}]}, "published": "2024-06-25T15:15:13.903", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:5102", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5101", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.16.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2025:2270", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "kernel-0:5.14.0-427.57.1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-03-05T00:00:00Z"}], "bugzilla": {"description": "kernel: ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()", "id": "2294274", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2294274"}, "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:H/I:N/A:N", "status": "verified"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\next4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()\nSyzbot reports a warning as follows:\n============================================\nWARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290\nModules linked in:\nCPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7\nRIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419\nCall Trace:\n<TASK>\next4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375\ngeneric_shutdown_super+0x136/0x2d0 fs/super.c:641\nkill_block_super+0x44/0x90 fs/super.c:1675\next4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327\n[...]\n============================================\nThis is because when finding an entry in ext4_xattr_block_cache_find(), if\next4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown\nin the __entry_find(), won't be put away, and eventually trigger the above\nissue in mb_cache_destroy() due to reference count leakage.\nSo call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix."], "name": "CVE-2024-39276", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-39276\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-39276"], "threat_severity": "Low"}

{}