{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: net: atm: fix use after free in lec_send() (CVE-2025-22004)\n\n* kernel: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() (CVE-2025-22121)\n\n* kernel: ibmvnic: Use kernel helpers for hex dumps (CVE-2025-22104)\n\n* kernel: ext4: fix off-by-one error in do_split (CVE-2025-23150)\n\n* kernel: udmabuf: fix a buf size overflow issue during udmabuf creation (CVE-2025-37803)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "title": "Details" }, { "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 Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2025:11572", "url": "https://access.redhat.com/errata/RHSA-2025:11572" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "2357142", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2357142" }, { "category": "external", "summary": "2360199", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2360199" }, { "category": "external", "summary": "2360265", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2360265" }, { "category": "external", "summary": "2363268", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363268" }, { "category": "external", "summary": "2365013", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2365013" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_11572.json" } ], "title": "Red Hat Security Advisory: kernel-rt security update", "tracking": { "current_release_date": "2026-06-30T03:30:42+00:00", "generator": { "date": "2026-06-30T03:30:42+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.3.0" } }, "id": "RHSA-2025:11572", "initial_release_date": "2025-07-23T00:18:22+00:00", "revision_history": [ { "date": "2025-07-23T00:18:22+00:00", "number": "1", "summary": "Initial version" }, { "date": "2025-07-23T00:18:22+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-06-30T03:30:42+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux Real Time E4S (v.9.2)", "product": { "name": "Red Hat Enterprise Linux Real Time E4S (v.9.2)", "product_id": "RT-9.2.0.Z.E4S", "product_identification_helper": { "cpe": "cpe:/a:redhat:rhel_e4s:9.2::realtime" } } }, { "category": "product_name", "name": "Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)", "product": { "name": "Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)", "product_id": "NFV-9.2.0.Z.E4S", "product_identification_helper": { "cpe": "cpe:/a:redhat:rhel_e4s:9.2::nfv" } } } ], "category": "product_family", "name": "Red Hat Enterprise Linux" }, { "branches": [ { "category": "product_version", "name": 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length before calling\n->send() to avoid a use after free.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: net: atm: fix use after free in lec_send()", "title": "Vulnerability summary" }, { "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": [ "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.src", "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-debuginfo-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", 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"description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nibmvnic: Use kernel helpers for hex dumps\n\nPreviously, when the driver was printing hex dumps, the buffer was cast\nto an 8 byte long and printed using string formatters. If the buffer\nsize was not a multiple of 8 then a read buffer overflow was possible.\n\nTherefore, create a new ibmvnic function that loops over a buffer and\ncalls hex_dump_to_buffer instead.\n\nThis patch address KASAN reports like the one below:\n ibmvnic 30000003 env3: Login Buffer:\n ibmvnic 30000003 env3: 01000000af000000\n <...>\n ibmvnic 30000003 env3: 2e6d62692e736261\n ibmvnic 30000003 env3: 65050003006d6f63\n ==================================================================\n BUG: KASAN: slab-out-of-bounds in ibmvnic_login+0xacc/0xffc [ibmvnic]\n Read of size 8 at addr c0000001331a9aa8 by task ip/17681\n <...>\n Allocated by task 17681:\n <...>\n ibmvnic_login+0x2f0/0xffc [ibmvnic]\n ibmvnic_open+0x148/0x308 [ibmvnic]\n __dev_open+0x1ac/0x304\n <...>\n The buggy address is located 168 bytes inside of\n allocated 175-byte region [c0000001331a9a00, c0000001331a9aaf)\n <...>\n =================================================================\n ibmvnic 30000003 env3: 000000000033766e", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: ibmvnic: Use kernel helpers for hex dumps", "title": "Vulnerability summary" }, { "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": [ "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.src", "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-debuginfo-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", 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vulnerability has been resolved:\n\next4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all()\n\nThere's issue as follows:\nBUG: KASAN: use-after-free in ext4_xattr_inode_dec_ref_all+0x6ff/0x790\nRead of size 4 at addr ffff88807b003000 by task syz-executor.0/15172\n\nCPU: 3 PID: 15172 Comm: syz-executor.0\nCall Trace:\n __dump_stack lib/dump_stack.c:82 [inline]\n dump_stack+0xbe/0xfd lib/dump_stack.c:123\n print_address_description.constprop.0+0x1e/0x280 mm/kasan/report.c:400\n __kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560\n kasan_report+0x3a/0x50 mm/kasan/report.c:585\n ext4_xattr_inode_dec_ref_all+0x6ff/0x790 fs/ext4/xattr.c:1137\n ext4_xattr_delete_inode+0x4c7/0xda0 fs/ext4/xattr.c:2896\n ext4_evict_inode+0xb3b/0x1670 fs/ext4/inode.c:323\n evict+0x39f/0x880 fs/inode.c:622\n iput_final fs/inode.c:1746 [inline]\n iput fs/inode.c:1772 [inline]\n iput+0x525/0x6c0 fs/inode.c:1758\n ext4_orphan_cleanup fs/ext4/super.c:3298 [inline]\n ext4_fill_super+0x8c57/0xba40 fs/ext4/super.c:5300\n mount_bdev+0x355/0x410 fs/super.c:1446\n legacy_get_tree+0xfe/0x220 fs/fs_context.c:611\n vfs_get_tree+0x8d/0x2f0 fs/super.c:1576\n do_new_mount fs/namespace.c:2983 [inline]\n path_mount+0x119a/0x1ad0 fs/namespace.c:3316\n do_mount+0xfc/0x110 fs/namespace.c:3329\n __do_sys_mount fs/namespace.c:3540 [inline]\n __se_sys_mount+0x219/0x2e0 fs/namespace.c:3514\n do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\n entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nMemory state around the buggy address:\n ffff88807b002f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff88807b002f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>ffff88807b003000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n ^\n ffff88807b003080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n ffff88807b003100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n\nAbove issue happens as ext4_xattr_delete_inode() isn't check xattr\nis valid if xattr is in inode.\nTo solve above issue call xattr_check_inode() check if xattr if valid\nin inode. In fact, we can directly verify in ext4_iget_extra_inode(),\nso that there is no divergent verification.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all()", "title": "Vulnerability summary" }, { "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": [ "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.src", "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", 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"discovery_date": "2025-05-01T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2363268" } ], "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix off-by-one error in do_split\n\nSyzkaller detected a use-after-free issue in ext4_insert_dentry that was\ncaused by out-of-bounds access due to incorrect splitting in do_split.\n\nBUG: KASAN: use-after-free in ext4_insert_dentry+0x36a/0x6d0 fs/ext4/namei.c:2109\nWrite of size 251 at addr ffff888074572f14 by task syz-executor335/5847\n\nCPU: 0 UID: 0 PID: 5847 Comm: syz-executor335 Not tainted 6.12.0-rc6-syzkaller-00318-ga9cda7c0ffed #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024\nCall Trace:\n \n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n kasan_check_range+0x282/0x290 mm/kasan/generic.c:189\n __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106\n ext4_insert_dentry+0x36a/0x6d0 fs/ext4/namei.c:2109\n add_dirent_to_buf+0x3d9/0x750 fs/ext4/namei.c:2154\n make_indexed_dir+0xf98/0x1600 fs/ext4/namei.c:2351\n ext4_add_entry+0x222a/0x25d0 fs/ext4/namei.c:2455\n ext4_add_nondir+0x8d/0x290 fs/ext4/namei.c:2796\n ext4_symlink+0x920/0xb50 fs/ext4/namei.c:3431\n vfs_symlink+0x137/0x2e0 fs/namei.c:4615\n do_symlinkat+0x222/0x3a0 fs/namei.c:4641\n __do_sys_symlink fs/namei.c:4662 [inline]\n __se_sys_symlink fs/namei.c:4660 [inline]\n __x64_sys_symlink+0x7a/0x90 fs/namei.c:4660\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n \n\nThe following loop is located right above 'if' statement.\n\nfor (i = count-1; i >= 0; i--) {\n\t/* is more than half of this entry in 2nd half of the block? */\n\tif (size + map[i].size/2 > blocksize/2)\n\t\tbreak;\n\tsize += map[i].size;\n\tmove++;\n}\n\n'i' in this case could go down to -1, in which case sum of active entries\nwouldn't exceed half the block size, but previous behaviour would also do\nsplit in half if sum would exceed at the very last block, which in case of\nhaving too many long name files in a single block could lead to\nout-of-bounds access and following use-after-free.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: ext4: fix off-by-one error in do_split", "title": "Vulnerability summary" }, { "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": [ 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"summary": "RHBZ#2363268", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363268" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2025-23150", "url": "https://www.cve.org/CVERecord?id=CVE-2025-23150" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-23150", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23150" }, { "category": "external", "summary": "https://lore.kernel.org/linux-cve-announce/2025050127-CVE-2025-23150-15b8@gregkh/T", "url": "https://lore.kernel.org/linux-cve-announce/2025050127-CVE-2025-23150-15b8@gregkh/T" } ], "release_date": "2025-05-01T00:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2025-07-23T00:18:22+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.", "product_ids": [ 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The flaw occurs in the `udmabuf_create()` function, which calculates the page count limit (`pglimit`) using the variable `size_limit_mb`. This size variable can be misinterpreted as either 32-bit or 64-bit, resulting in incorrect page limit checks and allocating a larger DMA buffer than permitted. This issue can lead to memory corruption, system instability, and a denial of service.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: udmabuf: fix a buf size overflow issue during udmabuf creation", "title": "Vulnerability summary" }, { "category": "other", "text": "An integer overflow in udmabuf_create can occur when computing the page limit from size_limit_mb using 32 bit arithmetic before shifting. This can cause pglimit to wrap and may break the intended buffer size enforcement, allowing a local user with access to the udmabuf device to request unexpectedly large allocations. The issue is not network reachable and does not imply memory corruption by itself. Impact is primarily denial of service via memory pressure or allocation failures.", "title": "Statement" }, { "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": [ "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.src", "NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-debuginfo-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", "NFV-9.2.0.Z.E4S:kernel-rt-debug-devel-0:5.14.0-284.126.1.rt14.411.el9_2.x86_64", 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