{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53433 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-53433 is a medium-severity vulnerability in Linux kernel, published on 18 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-53433 and fix it if it is affected.\n\nWhat it is: CVE-2023-53433 is a medium-severity vulnerability in Linux kernel, published on 18 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-53433 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-53433/ (Markdown: https://insights.sbomify.com/CVE-2023-53433/index.md)","id":"CVE-2023-53433","markdown":"https://insights.sbomify.com/CVE-2023-53433/index.md","name":"CVE-2023-53433","record":{"aliases":["BELL-CVE-2023-53433","DEBIAN-CVE-2023-53433","GHSA-79xj-p645-3ffq","UBUNTU-CVE-2023-53433"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A null pointer dereference in the Linux kernel network stack allows local attackers to cause a system crash via crafted network packets.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"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-\u003ehead 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 \u003c0f\u003e 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\u003cTASK\u003e\n[\u003cffffffff847018dd\u003e] __skb_gso_segment+0x32d/0x4c0 net/core/dev.c:3419\n[\u003cffffffff8470398a\u003e] skb_gso_segment include/linux/netdevice.h:4819 [inline]\n[\u003cffffffff8470398a\u003e] validate_xmit_skb+0x3aa/0xee0 net/core/dev.c:3725\n[\u003cffffffff84707042\u003e] __dev_queue_xmit+0x1332/0x3300 net/core/dev.c:4313\n[\u003cffffffff851a9ec7\u003e] dev_queue_xmit+0x17/0x20 include/linux/netdevice.h:3029\n[\u003cffffffff851b4a82\u003e] packet_snd net/packet/af_packet.c:3111 [inline]\n[\u003cffffffff851b4a82\u003e] packet_sendmsg+0x49d2/0x6470 net/packet/af_packet.c:3142\n[\u003cffffffff84669a12\u003e] sock_sendmsg_nosec net/socket.c:716 [inline]\n[\u003cffffffff84669a12\u003e] sock_sendmsg net/socket.c:736 [inline]\n[\u003cffffffff84669a12\u003e] __sys_sendto+0x472/0x5f0 net/socket.c:2139\n[\u003cffffffff84669c75\u003e] __do_sys_sendto net/socket.c:2151 [inline]\n[\u003cffffffff84669c75\u003e] __se_sys_sendto net/socket.c:2147 [inline]\n[\u003cffffffff84669c75\u003e] __x64_sys_sendto+0xe5/0x100 net/socket.c:2147\n[\u003cffffffff8551d40f\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n[\u003cffffffff8551d40f\u003e] do_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80\n[\u003cffffffff85600087\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"net: add vlan_get_protocol_and_depth() helper","id":"CVE-2023-53433","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2023"},"n_packages":0,"n_references":6,"next":{"headline":"remoteproc: imx_dsp_rproc: Add custom memory copy implementation for i.MX DSP Cores","id":"CVE-2023-53434"},"packages":[],"prev":{"headline":"firewire: net: fix use after free in fwnet_finish_incoming_packet()","id":"CVE-2023-53432"},"products":["Linux"],"published":"2025-09-18","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-23","vendors":["Linux"]},"summary":"A null pointer dereference in the Linux kernel network stack allows local attackers to cause a system crash via crafted network packets.","url":"https://insights.sbomify.com/CVE-2023-53433/"}