{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-53752", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53752", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-12-08T01:19:12.407Z", "updatedAt": "2026-08-05T09:15:48.993Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net: deal with integer overflows in kmalloc_reserve()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: deal with integer overflows in kmalloc_reserve()\n\nBlamed commit changed:\n ptr = kmalloc(size);\n if (ptr)\n size = ksize(ptr);\n\n size = kmalloc_size_roundup(size);\n ptr = kmalloc(size);\n\nThis allowed various crash as reported by syzbot [1]\nand Kyle Zeng.\n\nProblem is that if @size is bigger than 0x80000001,\nkmalloc_size_roundup(size) returns 2^32.\n\nkmalloc_reserve() uses a 32bit variable (obj_size),\nso 2^32 is truncated to 0.\n\nkmalloc(0) returns ZERO_SIZE_PTR which is not handled by\nskb allocations.\n\nFollowing trace can be triggered if a netdev->mtu is set\nclose to 0x7fffffff\n\nWe might in the future limit netdev->mtu to more sensible\nlimit (like KMALLOC_MAX_SIZE).\n\nThis patch is based on a syzbot report, and also a report\nand tentative fix from Kyle Zeng.\n\n[1]\nBUG: KASAN: user-memory-access in __build_skb_around net/core/skbuff.c:294 [inline]\nBUG: KASAN: user-memory-access in __alloc_skb+0x3c4/0x6e8 net/core/skbuff.c:527\nWrite of size 32 at addr 00000000fffffd10 by task syz-executor.4/22554\n\nCPU: 1 PID: 22554 Comm: syz-executor.4 Not tainted 6.1.39-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023\nCall trace:\ndump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:279\nshow_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:286\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0x120/0x1a0 lib/dump_stack.c:106\nprint_report+0xe4/0x4b4 mm/kasan/report.c:398\nkasan_report+0x150/0x1ac mm/kasan/report.c:495\nkasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189\nmemset+0x40/0x70 mm/kasan/shadow.c:44\n__build_skb_around net/core/skbuff.c:294 [inline]\n__alloc_skb+0x3c4/0x6e8 net/core/skbuff.c:527\nalloc_skb include/linux/skbuff.h:1316 [inline]\nigmpv3_newpack+0x104/0x1088 net/ipv4/igmp.c:359\nadd_grec+0x81c/0x1124 net/ipv4/igmp.c:534\nigmpv3_send_cr net/ipv4/igmp.c:667 [inline]\nigmp_ifc_timer_expire+0x1b0/0x1008 net/ipv4/igmp.c:810\ncall_timer_fn+0x1c0/0x9f0 kernel/time/timer.c:1474\nexpire_timers kernel/time/timer.c:1519 [inline]\n__run_timers+0x54c/0x710 kernel/time/timer.c:1790\nrun_timer_softirq+0x28/0x4c kernel/time/timer.c:1803\n_stext+0x380/0xfbc\n____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79\ncall_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891\ndo_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84\ninvoke_softirq kernel/softirq.c:437 [inline]\n__irq_exit_rcu+0x1c0/0x4cc kernel/softirq.c:683\nirq_exit_rcu+0x14/0x78 kernel/softirq.c:695\nel0_interrupt+0x7c/0x2e0 arch/arm64/kernel/entry-common.c:717\n__el0_irq_handler_common+0x18/0x24 arch/arm64/kernel/entry-common.c:724\nel0t_64_irq_handler+0x10/0x1c arch/arm64/kernel/entry-common.c:729\nel0t_64_irq+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0dbc898f5917c5a3bec6be19d9f5469cbc351a7d", "status": "affected", "versionType": "git", "lessThan": "31cf7853a940181593e4472fc56f46574123f9f6" }, { "version": "12d6c1d3a2ad0c199ec57c201cdc71e8e157a232", "status": "affected", "versionType": "git", "lessThan": "e4ffc47a1c3e5d11a853aa178c9a5136e79412e9" }, { "version": "12d6c1d3a2ad0c199ec57c201cdc71e8e157a232", "status": "affected", "versionType": "git", "lessThan": "bf7da02d2b8faf324206e1cbe64a4813ff903cc1" }, { "version": "12d6c1d3a2ad0c199ec57c201cdc71e8e157a232", "status": "affected", "versionType": "git", "lessThan": "915d975b2ffa58a14bfcf16fafe00c41315949ff" }, { "version": "6.1.31", "status": "affected", "versionType": "semver", "lessThan": "6.1.54" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.2" }, { "version": "6.1.54", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.4.16", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.4.*" }, { "version": "6.5.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.5.*" }, { "version": "6.6", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }