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{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: prevent kernel bug at submit_bh_wbc()\n\nFix a bug where nilfs_get_block() returns a successful status when\nsearching and inserting the specified block both fail inconsistently. If\nthis inconsistent behavior is not due to a previously fixed bug, then an\nunexpected race is occurring, so return a temporary error -EAGAIN instead.\n\nThis prevents callers such as __block_write_begin_int() from requesting a\nread into a buffer that is not mapped, which would cause the BUG_ON check\nfor the BH_Mapped flag in submit_bh_wbc() to fail."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: nilfs2: previene el error del kernel en submit_bh_wbc(). Se corrige un error por el cual nilfs_get_block() devuelve un estado exitoso cuando la b\u00fasqueda y la inserci\u00f3n del bloque especificado fallan de manera inconsistente. Si este comportamiento inconsistente no se debe a un error solucionado previamente, entonces se est\u00e1 produciendo una ejecuci\u00f3n inesperada, por lo que se devuelve un error temporal -EAGAIN. Esto evita que llamadores como __block_write_begin_int() soliciten una lectura en un b\u00fafer que no est\u00e1 asignado, lo que provocar\u00eda que falle la verificaci\u00f3n BUG_ON del indicador BH_Mapped en submit_bh_wbc()."}], "id": "CVE-2024-26955", "lastModified": "2024-11-21T09:03:28.917", "metrics": {}, "published": "2024-05-01T06:15:11.730", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c8aa4cfda4e4adb15d5b6536d155eca9c9cd44c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/192e9f9078c96be30b31c4b44d6294b24520fce5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/269cdf353b5bdd15f1a079671b0f889113865f20"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/32eaee72e96590a75445c8a6c7c1057673b47e07"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/48d443d200237782dc82e6b60663ec414ef02e39"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/76ffbe911e2798c7296968f5fd72f7bf67207a8d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91e4c4595fae5e87069e44687ae879091783c183"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca581d237f3b8539c044205bb003de71d75d227c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f0fe7ad5aff4f0fcf988913313c497de85f1e186"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/0c8aa4cfda4e4adb15d5b6536d155eca9c9cd44c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/192e9f9078c96be30b31c4b44d6294b24520fce5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/269cdf353b5bdd15f1a079671b0f889113865f20"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/32eaee72e96590a75445c8a6c7c1057673b47e07"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/48d443d200237782dc82e6b60663ec414ef02e39"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/76ffbe911e2798c7296968f5fd72f7bf67207a8d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/91e4c4595fae5e87069e44687ae879091783c183"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/ca581d237f3b8539c044205bb003de71d75d227c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/f0fe7ad5aff4f0fcf988913313c497de85f1e186"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: nilfs2: prevent kernel bug at submit_bh_wbc()", "id": "2278189", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2278189"}, "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-393->CWE-617", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnilfs2: prevent kernel bug at submit_bh_wbc()\nFix a bug where nilfs_get_block() returns a successful status when\nsearching and inserting the specified block both fail inconsistently. If\nthis inconsistent behavior is not due to a previously fixed bug, then an\nunexpected race is occurring, so return a temporary error -EAGAIN instead.\nThis prevents callers such as __block_write_begin_int() from requesting a\nread into a buffer that is not mapped, which would cause the BUG_ON check\nfor the BH_Mapped flag in submit_bh_wbc() to fail.", "A flaw was found in the nilfs2 module in the Linux kernel. A wrong return status code allows callers to request a read into a buffer that is not mapped, triggering an assertion failure and resulting in a denial of service."], "name": "CVE-2024-26955", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "2024-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26955\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26955\nhttps://lore.kernel.org/linux-cve-announce/2024050128-CVE-2024-26955-3205@gregkh/T"], "statement": "The nilfs2 module is not built in the kernel shipped in Red Hat Enterprise Linux, so it is not affected by this vulnerability.", "threat_severity": "Moderate"}

{"created": "2025-07-12T22:31:30.401792+00:00", "updated": "2025-07-12T22:31:30.401857+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}