{ "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-2023-53439", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53439", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-09-18T16:04:17.166Z", "updatedAt": "2026-05-11T19:45:00.352Z", "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: skb_partial_csum_set() fix against transport header magic value", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skb_partial_csum_set() fix against transport header magic value\n\nskb->transport_header uses the special 0xFFFF value\nto mark if the transport header was set or not.\n\nWe must prevent callers to accidentaly set skb->transport_header\nto 0xFFFF. Note that only fuzzers can possibly do this today.\n\nsyzbot reported:\n\nWARNING: CPU: 0 PID: 2340 at include/linux/skbuff.h:2847 skb_transport_offset include/linux/skbuff.h:2956 [inline]\nWARNING: CPU: 0 PID: 2340 at include/linux/skbuff.h:2847 virtio_net_hdr_to_skb+0xbcc/0x10c0 include/linux/virtio_net.h:103\nModules linked in:\nCPU: 0 PID: 2340 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023\nRIP: 0010:skb_transport_header include/linux/skbuff.h:2847 [inline]\nRIP: 0010:skb_transport_offset include/linux/skbuff.h:2956 [inline]\nRIP: 0010:virtio_net_hdr_to_skb+0xbcc/0x10c0 include/linux/virtio_net.h:103\nCode: 41 39 df 0f 82 c3 04 00 00 48 8b 7c 24 10 44 89 e6 e8 08 6e 59 ff 48 85 c0 74 54 e8 ce 36 7e fc e9 37 f8 ff ff e8 c4 36 7e fc <0f> 0b e9 93 f8 ff ff 44 89 f7 44 89 e6 e8 32 38 7e fc 45 39 e6 0f\nRSP: 0018:ffffc90004497880 EFLAGS: 00010293\nRAX: ffffffff84fea55c RBX: 000000000000ffff RCX: ffff888120be2100\nRDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff\nRBP: ffffc90004497990 R08: ffffffff84fe9de5 R09: 0000000000000034\nR10: ffffea00048ebd80 R11: 0000000000000034 R12: ffff88811dc2d9c8\nR13: dffffc0000000000 R14: ffff88811dc2d9ae R15: 1ffff11023b85b35\nFS: 00007f9211a59700(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00000000200002c0 CR3: 00000001215a5000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\npacket_snd net/packet/af_packet.c:3076 [inline]\npacket_sendmsg+0x4590/0x61a0 net/packet/af_packet.c:3115\nsock_sendmsg_nosec net/socket.c:724 [inline]\nsock_sendmsg net/socket.c:747 [inline]\n__sys_sendto+0x472/0x630 net/socket.c:2144\n__do_sys_sendto net/socket.c:2156 [inline]\n__se_sys_sendto net/socket.c:2152 [inline]\n__x64_sys_sendto+0xe5/0x100 net/socket.c:2152\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7f9210c8c169\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f9211a59168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 00007f9210dabf80 RCX: 00007f9210c8c169\nRDX: 000000000000ffed RSI: 00000000200000c0 RDI: 0000000000000003\nRBP: 00007f9210ce7ca1 R08: 0000000020000540 R09: 0000000000000014\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007ffe135d65cf R14: 00007f9211a59300 R15: 0000000000022000", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "66e4c8d950083df8e12981babca788e1635c92b6", "status": "affected", "versionType": "git", "lessThan": "3e785c8deb046305c61b9fa02265d0cb900c4a45" }, { "version": "66e4c8d950083df8e12981babca788e1635c92b6", "status": "affected", "versionType": "git", "lessThan": "70a76d6816148819d0464f71aafa126c84826628" }, { "version": "66e4c8d950083df8e12981babca788e1635c92b6", "status": "affected", "versionType": "git", "lessThan": "424f8416bb39936df6365442d651ee729b283460" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.19", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.19" }, { "version": "6.1.30", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.3.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.3.*" }, { "version": "6.4", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }