{"id":"CVE-2023-53433","state":"PUBLISHED","title":"net: add vlan_get_protocol_and_depth() helper","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: add vlan_get_protocol_and_depth() helper\n\nBefore blamed commit, pskb_may_pull() was used instead\nof skb_header_pointer() in __vlan_get_protocol() and friends.\n\nFew callers depended on skb->head being populated with MAC header,\nsyzbot caught one of them (skb_mac_gso_segment())\n\nAdd vlan_get_protocol_and_depth() to make the intent clearer\nand use it where sensible.\n\nThis is a more generic fix than commit e9d3f80935b6\n(\"net/af_packet: make sure to pull mac header\") which was\ndealing with a similar issue.\n\nkernel BUG at include/linux/skbuff.h:2655 !\ninvalid opcode: 0000 [#1] SMP KASAN\nCPU: 0 PID: 1441 Comm: syz-executor199 Not tainted 6.1.24-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023\nRIP: 0010:__skb_pull include/linux/skbuff.h:2655 [inline]\nRIP: 0010:skb_mac_gso_segment+0x68f/0x6a0 net/core/gro.c:136\nCode: fd 48 8b 5c 24 10 44 89 6b 70 48 c7 c7 c0 ae 0d 86 44 89 e6 e8 a1 91 d0 00 48 c7 c7 00 af 0d 86 48 89 de 31 d2 e8 d1 4a e9 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41\nRSP: 0018:ffffc90001bd7520 EFLAGS: 00010286\nRAX: ffffffff8469736a RBX: ffff88810f31dac0 RCX: ffff888115a18b00\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: ffffc90001bd75e8 R08: ffffffff84697183 R09: fffff5200037adf9\nR10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000012\nR13: 000000000000fee5 R14: 0000000000005865 R15: 000000000000fed7\nFS: 000055555633f300(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020000000 CR3: 0000000116fea000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\n[<ffffffff847018dd>] __skb_gso_segment+0x32d/0x4c0 net/core/dev.c:3419\n[<ffffffff8470398a>] skb_gso_segment include/linux/netdevice.h:4819 [inline]\n[<ffffffff8470398a>] validate_xmit_skb+0x3aa/0xee0 net/core/dev.c:3725\n[<ffffffff84707042>] __dev_queue_xmit+0x1332/0x3300 net/core/dev.c:4313\n[<ffffffff851a9ec7>] dev_queue_xmit+0x17/0x20 include/linux/netdevice.h:3029\n[<ffffffff851b4a82>] packet_snd net/packet/af_packet.c:3111 [inline]\n[<ffffffff851b4a82>] packet_sendmsg+0x49d2/0x6470 net/packet/af_packet.c:3142\n[<ffffffff84669a12>] sock_sendmsg_nosec net/socket.c:716 [inline]\n[<ffffffff84669a12>] sock_sendmsg net/socket.c:736 [inline]\n[<ffffffff84669a12>] __sys_sendto+0x472/0x5f0 net/socket.c:2139\n[<ffffffff84669c75>] __do_sys_sendto net/socket.c:2151 [inline]\n[<ffffffff84669c75>] __se_sys_sendto net/socket.c:2147 [inline]\n[<ffffffff84669c75>] __x64_sys_sendto+0xe5/0x100 net/socket.c:2147\n[<ffffffff8551d40f>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n[<ffffffff8551d40f>] do_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80\n[<ffffffff85600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd","publishedAt":"2025-09-18T16:04:13.126Z","updatedAt":"2026-05-23T15:28:55.105Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"30d015f5ecd9ce5706ad18a4a0649f364e3e6f7b","status":"affected","lessThan":"4188c5269475ac59d467b5814c5df02756f6d907","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"34a5ee69ec6273f0aee79e7ce4d14afc83ca8122","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"9dd9ffe118415b4ac1cebac43443000072bc8f46","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"55caf900e13cd04466def08173a14b41d18c19c3","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"15eaeb8941f12fcc2713c4bf6eb8f76a37854b4d","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"4063384ef762cc5946fc7a3f89879e76c6ec51e2","versionType":"git"},{"version":"bb7b26278b384dad1423101dc69157b63968ed1c","status":"affected","versionType":"git"},{"version":"a890a3d3115da196ff25599fe900f34016a4ef49","status":"affected","versionType":"git"},{"version":"502bbb8480c38ae6caa4f890b98db3b2a4ae919a","status":"affected","versionType":"git"},{"version":"d4d0e6c07bcd17d704afe64e10382ffc5d342765","status":"affected","versionType":"git"},{"version":"754056791f66153890825c2626174aaa7fe82d16","status":"affected","versionType":"git"},{"version":"5.4.53","status":"affected","lessThan":"5.4.244","versionType":"semver"},{"version":"4.4.248","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.248","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.212","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.134","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.7.10","status":"affected","lessThan":"5.8","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/tap.c","include/linux/if_vlan.h","net/bridge/br_forward.c","net/core/dev.c","net/packet/af_packet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.4.244","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.181","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.113","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.30","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.3.4","status":"unaffected","lessThanOrEqual":"6.3.*","versionType":"semver"},{"version":"6.4","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/tap.c","include/linux/if_vlan.h","net/bridge/br_forward.c","net/core/dev.c","net/packet/af_packet.c"]}],"references":["https://git.kernel.org/stable/c/4188c5269475ac59d467b5814c5df02756f6d907","https://git.kernel.org/stable/c/34a5ee69ec6273f0aee79e7ce4d14afc83ca8122","https://git.kernel.org/stable/c/9dd9ffe118415b4ac1cebac43443000072bc8f46","https://git.kernel.org/stable/c/55caf900e13cd04466def08173a14b41d18c19c3","https://git.kernel.org/stable/c/15eaeb8941f12fcc2713c4bf6eb8f76a37854b4d","https://git.kernel.org/stable/c/4063384ef762cc5946fc7a3f89879e76c6ec51e2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53433.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53433","state":"PUBLISHED","datePublished":"2025-09-18T16:04:13.126Z","dateUpdated":"2026-05-23T15:28:55.105Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-17T14:54:09.745Z"},"containers":{"cna":{"title":"net: add vlan_get_protocol_and_depth() helper","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: add vlan_get_protocol_and_depth() helper\n\nBefore blamed commit, pskb_may_pull() was used instead\nof skb_header_pointer() in __vlan_get_protocol() and friends.\n\nFew callers depended on skb->head being populated with MAC header,\nsyzbot caught one of them (skb_mac_gso_segment())\n\nAdd vlan_get_protocol_and_depth() to make the intent clearer\nand use it where sensible.\n\nThis is a more generic fix than commit e9d3f80935b6\n(\"net/af_packet: make sure to pull mac header\") which was\ndealing with a similar issue.\n\nkernel BUG at include/linux/skbuff.h:2655 !\ninvalid opcode: 0000 [#1] SMP KASAN\nCPU: 0 PID: 1441 Comm: syz-executor199 Not tainted 6.1.24-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023\nRIP: 0010:__skb_pull include/linux/skbuff.h:2655 [inline]\nRIP: 0010:skb_mac_gso_segment+0x68f/0x6a0 net/core/gro.c:136\nCode: fd 48 8b 5c 24 10 44 89 6b 70 48 c7 c7 c0 ae 0d 86 44 89 e6 e8 a1 91 d0 00 48 c7 c7 00 af 0d 86 48 89 de 31 d2 e8 d1 4a e9 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41\nRSP: 0018:ffffc90001bd7520 EFLAGS: 00010286\nRAX: ffffffff8469736a RBX: ffff88810f31dac0 RCX: ffff888115a18b00\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: ffffc90001bd75e8 R08: ffffffff84697183 R09: fffff5200037adf9\nR10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000012\nR13: 000000000000fee5 R14: 0000000000005865 R15: 000000000000fed7\nFS: 000055555633f300(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020000000 CR3: 0000000116fea000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\n[<ffffffff847018dd>] __skb_gso_segment+0x32d/0x4c0 net/core/dev.c:3419\n[<ffffffff8470398a>] skb_gso_segment include/linux/netdevice.h:4819 [inline]\n[<ffffffff8470398a>] validate_xmit_skb+0x3aa/0xee0 net/core/dev.c:3725\n[<ffffffff84707042>] __dev_queue_xmit+0x1332/0x3300 net/core/dev.c:4313\n[<ffffffff851a9ec7>] dev_queue_xmit+0x17/0x20 include/linux/netdevice.h:3029\n[<ffffffff851b4a82>] packet_snd net/packet/af_packet.c:3111 [inline]\n[<ffffffff851b4a82>] packet_sendmsg+0x49d2/0x6470 net/packet/af_packet.c:3142\n[<ffffffff84669a12>] sock_sendmsg_nosec net/socket.c:716 [inline]\n[<ffffffff84669a12>] sock_sendmsg net/socket.c:736 [inline]\n[<ffffffff84669a12>] __sys_sendto+0x472/0x5f0 net/socket.c:2139\n[<ffffffff84669c75>] __do_sys_sendto net/socket.c:2151 [inline]\n[<ffffffff84669c75>] __se_sys_sendto net/socket.c:2147 [inline]\n[<ffffffff84669c75>] __x64_sys_sendto+0xe5/0x100 net/socket.c:2147\n[<ffffffff8551d40f>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n[<ffffffff8551d40f>] do_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80\n[<ffffffff85600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"30d015f5ecd9ce5706ad18a4a0649f364e3e6f7b","status":"affected","lessThan":"4188c5269475ac59d467b5814c5df02756f6d907","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"34a5ee69ec6273f0aee79e7ce4d14afc83ca8122","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"9dd9ffe118415b4ac1cebac43443000072bc8f46","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"55caf900e13cd04466def08173a14b41d18c19c3","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"15eaeb8941f12fcc2713c4bf6eb8f76a37854b4d","versionType":"git"},{"version":"469aceddfa3ed16e17ee30533fae45e90f62efd8","status":"affected","lessThan":"4063384ef762cc5946fc7a3f89879e76c6ec51e2","versionType":"git"},{"version":"bb7b26278b384dad1423101dc69157b63968ed1c","status":"affected","versionType":"git"},{"version":"a890a3d3115da196ff25599fe900f34016a4ef49","status":"affected","versionType":"git"},{"version":"502bbb8480c38ae6caa4f890b98db3b2a4ae919a","status":"affected","versionType":"git"},{"version":"d4d0e6c07bcd17d704afe64e10382ffc5d342765","status":"affected","versionType":"git"},{"version":"754056791f66153890825c2626174aaa7fe82d16","status":"affected","versionType":"git"},{"version":"5.4.53","status":"affected","lessThan":"5.4.244","versionType":"semver"},{"version":"4.4.248","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.248","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.212","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.134","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.7.10","status":"affected","lessThan":"5.8","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/tap.c","include/linux/if_vlan.h","net/bridge/br_forward.c","net/core/dev.c","net/packet/af_packet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.4.244","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.181","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.113","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.30","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.3.4","status":"unaffected","lessThanOrEqual":"6.3.*","versionType":"semver"},{"version":"6.4","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/tap.c","include/linux/if_vlan.h","net/bridge/br_forward.c","net/core/dev.c","net/packet/af_packet.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4188c5269475ac59d467b5814c5df02756f6d907"},{"url":"https://git.kernel.org/stable/c/34a5ee69ec6273f0aee79e7ce4d14afc83ca8122"},{"url":"https://git.kernel.org/stable/c/9dd9ffe118415b4ac1cebac43443000072bc8f46"},{"url":"https://git.kernel.org/stable/c/55caf900e13cd04466def08173a14b41d18c19c3"},{"url":"https://git.kernel.org/stable/c/15eaeb8941f12fcc2713c4bf6eb8f76a37854b4d"},{"url":"https://git.kernel.org/stable/c/4063384ef762cc5946fc7a3f89879e76c6ec51e2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:28:55.105Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.53","versionEndExcluding":"5.4.244"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.10.181"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.3.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7.10"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2023-53433","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T19:15:42.586343Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-14T19:23:09.776Z"}}]}}}