{ "document": { "aggregate_severity": { "text": "High" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos6els/vex/2025/cve-2025-38415-els_os-centos6els.json" } ], "tracking": { "current_release_date": "2026-01-28T10:47:34Z", "generator": { "date": "2026-01-28T10:47:34Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2025-38415-ELS_OS-CENTOS6ELS", "initial_release_date": "2025-07-25T14:15:00Z", "revision_history": [ { "date": "2025-07-25T14:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-01-28T10:47:34Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on 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Operating System 6", "product_id": "CentOS-6:kernel-firmware-0:2.6.32-754.35.8.el6.noarch" }, "product_reference": "kernel-firmware-0:2.6.32-754.35.8.el6.noarch", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "perf-0:2.6.32-754.35.8.el6.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:perf-0:2.6.32-754.35.8.el6.x86_64" }, "product_reference": "perf-0:2.6.32-754.35.8.el6.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-headers-0:2.6.32-754.35.8.el6.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:kernel-headers-0:2.6.32-754.35.8.el6.x86_64" }, "product_reference": "kernel-headers-0:2.6.32-754.35.8.el6.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-doc-0:2.6.32-754.35.8.el6.noarch as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:kernel-doc-0:2.6.32-754.35.8.el6.noarch" }, "product_reference": "kernel-doc-0:2.6.32-754.35.8.el6.noarch", "relates_to_product_reference": "CentOS-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2025-38415", "cwe": { "id": "CWE-787", "name": "Out-of-bounds Write" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nSquashfs: check return result of sb_min_blocksize\n\nSyzkaller reports an \"UBSAN: shift-out-of-bounds in squashfs_bio_read\" bug.\n\nSyzkaller forks multiple processes which after mounting the Squashfs\nfilesystem, issues an ioctl(\"/dev/loop0\", LOOP_SET_BLOCK_SIZE, 0x8000). \nNow if this ioctl occurs at the same time another process is in the\nprocess of mounting a Squashfs filesystem on /dev/loop0, the failure\noccurs. When this happens the following code in squashfs_fill_super()\nfails.\n\n----\nmsblk->devblksize = sb_min_blocksize(sb, SQUASHFS_DEVBLK_SIZE);\nmsblk->devblksize_log2 = ffz(~msblk->devblksize);\n----\n\nsb_min_blocksize() returns 0, which means msblk->devblksize is set to 0.\n\nAs a result, ffz(~msblk->devblksize) returns 64, and msblk->devblksize_log2\nis set to 64.\n\nThis subsequently causes the\n\nUBSAN: shift-out-of-bounds in fs/squashfs/block.c:195:36\nshift exponent 64 is too large for 64-bit type 'u64' (aka\n'unsigned long long')\n\nThis commit adds a check for a 0 return by sb_min_blocksize().", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "CentOS-6:kernel-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els28.noarch", "CentOS-6:kernel-debug-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els28.i686", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-devel-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els28.noarch", "CentOS-6:kernel-firmware-0:2.6.32-754.35.8.el6.tuxcare.els28.noarch", "CentOS-6:kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:perf-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:python-perf-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64" ], "known_affected": [ "CentOS-6:kernel-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.noarch", "CentOS-6:kernel-debug-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.i686", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-devel-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-doc-0:2.6.32-754.35.8.el6.noarch", "CentOS-6:kernel-firmware-0:2.6.32-754.35.8.el6.noarch", "CentOS-6:kernel-headers-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:perf-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:python-perf-0:2.6.32-754.35.8.el6.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2025-38415" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/0aff95d9bc7fb5400ca8af507429c4b067bdb425", "url": "https://git.kernel.org/stable/c/0aff95d9bc7fb5400ca8af507429c4b067bdb425" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/295ab18c2dbce8d0ac6ecf7c5187e16e1ac8b282", "url": "https://git.kernel.org/stable/c/295ab18c2dbce8d0ac6ecf7c5187e16e1ac8b282" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/4f99357dadbf9c979ad737156ad4c37fadf7c56b", "url": "https://git.kernel.org/stable/c/4f99357dadbf9c979ad737156ad4c37fadf7c56b" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/549f9e3d7b60d53808c98b9fde49b4f46d0524a5", "url": "https://git.kernel.org/stable/c/549f9e3d7b60d53808c98b9fde49b4f46d0524a5" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/5c51aa862cbeed2f3887f0382a2708956710bd68", "url": "https://git.kernel.org/stable/c/5c51aa862cbeed2f3887f0382a2708956710bd68" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/6abf6b78c6fb112eee495f5636ffcc350dd2ce25", "url": "https://git.kernel.org/stable/c/6abf6b78c6fb112eee495f5636ffcc350dd2ce25" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/734aa85390ea693bb7eaf2240623d41b03705c84", "url": "https://git.kernel.org/stable/c/734aa85390ea693bb7eaf2240623d41b03705c84" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/db7096ea160e40d78c67fce52e7cc51bde049497", "url": "https://git.kernel.org/stable/c/db7096ea160e40d78c67fce52e7cc51bde049497" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html", "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html", "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" } ], "release_date": "2025-07-25T14:15:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-01-17T16:58:50.832511Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1768669128", "product_ids": [ "CentOS-6:kernel-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els28.noarch", "CentOS-6:kernel-debug-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els28.i686", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-devel-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els28.noarch", "CentOS-6:kernel-firmware-0:2.6.32-754.35.8.el6.tuxcare.els28.noarch", "CentOS-6:kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:perf-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:python-perf-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1768669128" }, { "category": "none_available", "details": "Affected", "product_ids": [ "CentOS-6:kernel-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.noarch", "CentOS-6:kernel-debug-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.i686", "CentOS-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-devel-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-doc-0:2.6.32-754.35.8.el6.noarch", "CentOS-6:kernel-firmware-0:2.6.32-754.35.8.el6.noarch", "CentOS-6:kernel-headers-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:perf-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:python-perf-0:2.6.32-754.35.8.el6.x86_64" ] } ], "scores": [ { "cvss_v3": { "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" }, "products": [ "CentOS-6:kernel-0:2.6.32-754.35.8.el6.tuxcare.els28.x86_64", "CentOS-6:kernel-0:2.6.32-754.35.8.el6.x86_64", "CentOS-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.noarch", 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