{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53462", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-01T11:39:39.399Z", "datePublished": "2025-10-01T11:42:33.434Z", "dateUpdated": "2026-08-05T09:14:11.442Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:14:11.442Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhsr: Fix uninit-value access in fill_frame_info()\n\nSyzbot reports the following uninit-value access problem.\n\n=====================================================\nBUG: KMSAN: uninit-value in fill_frame_info net/hsr/hsr_forward.c:601 [inline]\nBUG: KMSAN: uninit-value in hsr_forward_skb+0x9bd/0x30f0 net/hsr/hsr_forward.c:616\n fill_frame_info net/hsr/hsr_forward.c:601 [inline]\n hsr_forward_skb+0x9bd/0x30f0 net/hsr/hsr_forward.c:616\n hsr_dev_xmit+0x192/0x330 net/hsr/hsr_device.c:223\n __netdev_start_xmit include/linux/netdevice.h:4889 [inline]\n netdev_start_xmit include/linux/netdevice.h:4903 [inline]\n xmit_one net/core/dev.c:3544 [inline]\n dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3560\n __dev_queue_xmit+0x34d0/0x52a0 net/core/dev.c:4340\n dev_queue_xmit include/linux/netdevice.h:3082 [inline]\n packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\n packet_snd net/packet/af_packet.c:3087 [inline]\n packet_sendmsg+0x8b1d/0x9f30 net/packet/af_packet.c:3119\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n __sys_sendto+0x781/0xa30 net/socket.c:2176\n __do_sys_sendto net/socket.c:2188 [inline]\n __se_sys_sendto net/socket.c:2184 [inline]\n __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2184\n do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]\n __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178\n do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203\n do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246\n entry_SYSENTER_compat_after_hwframe+0x70/0x82\n\nUninit was created at:\n slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523\n kmalloc_reserve+0x148/0x470 net/core/skbuff.c:559\n __alloc_skb+0x318/0x740 net/core/skbuff.c:644\n alloc_skb include/linux/skbuff.h:1286 [inline]\n alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6299\n sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2794\n packet_alloc_skb net/packet/af_packet.c:2936 [inline]\n packet_snd net/packet/af_packet.c:3030 [inline]\n packet_sendmsg+0x70e8/0x9f30 net/packet/af_packet.c:3119\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n __sys_sendto+0x781/0xa30 net/socket.c:2176\n __do_sys_sendto net/socket.c:2188 [inline]\n __se_sys_sendto net/socket.c:2184 [inline]\n __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2184\n do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]\n __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178\n do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203\n do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246\n entry_SYSENTER_compat_after_hwframe+0x70/0x82\n\nIt is because VLAN not yet supported in hsr driver. Return error\nwhen protocol is ETH_P_8021Q in fill_frame_info() now to fix it." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - HSR/PRP is an L2 industrial redundancy protocol; PRP slave ports have no invalid_dan_ingress_frame filter, so crafted ETH_P_8021Q frames from the same LAN/segment reach fill_frame_info() via hsr_handle_frame() without crossing a routed network.\nAC:L - An attacker only needs to send an Ethernet frame with ethertype 802.1Q (including a short frame on soft interfaces such as veth) to reliably hit the missing VLAN length check and continued processing path.\nPR:N - The highest-impact path is an unauthenticated adjacent L2 peer sending frames to an already-configured PRP/HSR slave; no local account or capability on the target is required.\nUI:N - Exploitation requires no victim action beyond the HSR/PRP interface already being up and receiving frames.\nS:U - Impact is confined to the host kernel processing HSR/PRP frames; this is not a VM escape, IOMMU bypass, or other cross-authority boundary.\nC:L - The bug reads past a 14-byte Ethernet header into uninitialized/out-of-bounds skb bytes for the VLAN encapsulated proto (a few bytes), and with is_vlan set those bytes can be incorporated into forwarded frames, yielding a limited disclosure rather than arbitrary read.\nI:N - The defect is an out-of-bounds/uninit read and incorrect VLAN continuation; it does not provide a kernel write primitive or integrity-corrupting memory write.\nA:H - Out-of-bounds access past short skb data into adjacent skb memory can fault or otherwise destabilize the kernel while processing attacker-controlled frames, so availability impact is high." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/hsr/hsr_forward.c" ], "versions": [ { "version": "451d8123f89791bb628277c0bdb4cae34a3563e6", "lessThan": "1e90a93ac4845c31724ec5dc96fb51e608435a9d", "status": "affected", "versionType": "git" }, { "version": "451d8123f89791bb628277c0bdb4cae34a3563e6", "lessThan": "6a4480c5e6ebaf9f797ac300e2a97a02d4e70cfd", "status": "affected", "versionType": "git" }, { "version": "451d8123f89791bb628277c0bdb4cae34a3563e6", "lessThan": "61866f7d814e5792bf47410d7d3ff32e49bd292a", "status": "affected", "versionType": "git" }, { "version": "451d8123f89791bb628277c0bdb4cae34a3563e6", "lessThan": "ed7a0ba7e840dc5d54cdbd8466be27e6aedce1e5", "status": "affected", "versionType": "git" }, { "version": "451d8123f89791bb628277c0bdb4cae34a3563e6", "lessThan": "484b4833c604c0adcf19eac1ca14b60b757355b5", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/hsr/hsr_forward.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.195", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.132", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.54", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5.4", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.10.195" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.132" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.54" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.5.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1e90a93ac4845c31724ec5dc96fb51e608435a9d" }, { "url": "https://git.kernel.org/stable/c/6a4480c5e6ebaf9f797ac300e2a97a02d4e70cfd" }, { "url": "https://git.kernel.org/stable/c/61866f7d814e5792bf47410d7d3ff32e49bd292a" }, { "url": "https://git.kernel.org/stable/c/ed7a0ba7e840dc5d54cdbd8466be27e6aedce1e5" }, { "url": "https://git.kernel.org/stable/c/484b4833c604c0adcf19eac1ca14b60b757355b5" } ], "title": "hsr: Fix uninit-value access in fill_frame_info()", "x_generator": { "engine": "bippy-1.2.0" } } } }