{ "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-2023-52772", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52772", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2024-05-21T15:30:54.292Z", "updatedAt": "2026-08-05T09:11:21.348Z", "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": "af_unix: fix use-after-free in unix_stream_read_actor()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: fix use-after-free in unix_stream_read_actor()\n\nsyzbot reported the following crash [1]\n\nAfter releasing unix socket lock, u->oob_skb can be changed\nby another thread. We must temporarily increase skb refcount\nto make sure this other thread will not free the skb under us.\n\n[1]\n\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\nRead of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297\n\nCPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\nCall Trace:\n\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\nprint_address_description mm/kasan/report.c:364 [inline]\nprint_report+0xc4/0x620 mm/kasan/report.c:475\nkasan_report+0xda/0x110 mm/kasan/report.c:588\nunix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\nunix_stream_recv_urg net/unix/af_unix.c:2587 [inline]\nunix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666\nunix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903\nsock_recvmsg_nosec net/socket.c:1044 [inline]\nsock_recvmsg+0xe2/0x170 net/socket.c:1066\n____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803\n___sys_recvmsg+0x115/0x1a0 net/socket.c:2845\n__sys_recvmsg+0x114/0x1e0 net/socket.c:2875\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\nRIP: 0033:0x7fc67492c559\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\nRAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559\nRDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004\nRBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340\nR13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388\n\n\nAllocated by task 5295:\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\n__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328\nkasan_slab_alloc include/linux/kasan.h:188 [inline]\nslab_post_alloc_hook mm/slab.h:763 [inline]\nslab_alloc_node mm/slub.c:3478 [inline]\nkmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523\n__alloc_skb+0x287/0x330 net/core/skbuff.c:641\nalloc_skb include/linux/skbuff.h:1286 [inline]\nalloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331\nsock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780\nsock_alloc_send_skb include/net/sock.h:1884 [inline]\nqueue_oob net/unix/af_unix.c:2147 [inline]\nunix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2667\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nFreed by task 5295:\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\nkasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522\n____kasan_slab_free mm/kasan/common.c:236 [inline]\n____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200\nkasan_slab_free include/linux/kasan.h:164 [inline]\nslab_free_hook mm/slub.c:1800 [inline]\nslab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826\nslab_free mm/slub.c:3809 [inline]\nkmem_cache_free+0xf8/0x340 mm/slub.c:3831\nkfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015\n__kfree_skb net/core/skbuff.c:1073 [inline]\nconsume_skb net/core/skbuff.c:1288 [inline]\nconsume_skb+0xdf/0x170 net/core/skbuff.c:1282\nqueue_oob net/unix/af_unix.c:2178 [inline]\nu\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "876c14ad014d0e39c57cbfde53e13d17cdb6d645", "status": "affected", "versionType": "git", "lessThan": "75bcfc188abf4fae9c1d5f5dc0a03540be602eef" }, { "version": "876c14ad014d0e39c57cbfde53e13d17cdb6d645", "status": "affected", "versionType": "git", "lessThan": "d179189eec426fe4801e4b91efa1889faed12700" }, { "version": "876c14ad014d0e39c57cbfde53e13d17cdb6d645", "status": "affected", "versionType": "git", "lessThan": "eae0b295ce16d8c8b4114c3037993191b4bb92f0" }, { "version": "876c14ad014d0e39c57cbfde53e13d17cdb6d645", "status": "affected", "versionType": "git", "lessThan": "069a3ec329ff43e7869a3d94c62cd03203016bce" }, { "version": "876c14ad014d0e39c57cbfde53e13d17cdb6d645", "status": "affected", "versionType": "git", "lessThan": "4b7b492615cf3017190f55444f7016812b66611d" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.15" }, { "version": "5.15.140", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.64", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.5.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.5.*" }, { "version": "6.6.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }