{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53111 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-53111 is a medium-severity vulnerability in Linux kernel, published on 24 Jun 2026. 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-2026-53111 and fix it if it is affected.\n\nWhat it is: CVE-2026-53111 is a medium-severity vulnerability in Linux kernel, published on 24 Jun 2026. 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-2026-53111 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-2026-53111/ (Markdown: https://insights.sbomify.com/CVE-2026-53111/index.md)","id":"CVE-2026-53111","markdown":"https://insights.sbomify.com/CVE-2026-53111/index.md","name":"CVE-2026-53111","record":{"aliases":["BELL-CVE-2026-53111","DEBIAN-CVE-2026-53111","GHSA-gj9x-pqvx-p5mh","ROOT-OS-DEBIAN-11-CVE-2026-53111","ROOT-OS-DEBIAN-12-CVE-2026-53111","ROOT-OS-UBUNTU-2204-CVE-2026-53111","ROOT-OS-UBUNTU-2404-CVE-2026-53111","UBUNTU-CVE-2026-53111"],"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's BPF test_run helper allows local attackers to cause a kernel crash and denial of service.","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":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap\n\nThe bpf_lwt_xmit_push_encap helper needs to access skb_dst(skb)-\u003edev to\ncalculate the needed headroom:\n\n\terr = skb_cow_head(skb,\n\t\t\t   len + LL_RESERVED_SPACE(skb_dst(skb)-\u003edev));\n\nBut skb-\u003e_skb_refdst may not be initialized when the skb is set up by\nbpf_prog_test_run_skb function. Executing bpf_lwt_push_ip_encap function\nin this scenario will trigger null pointer dereference, causing a kernel\ncrash as Yinhao reported:\n\n[  105.186365] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[  105.186382] #PF: supervisor read access in kernel mode\n[  105.186388] #PF: error_code(0x0000) - not-present page\n[  105.186393] PGD 121d3d067 P4D 121d3d067 PUD 106c83067 PMD 0\n[  105.186404] Oops: 0000 [#1] PREEMPT SMP NOPTI\n[  105.186412] CPU: 3 PID: 3250 Comm: poc Kdump: loaded Not tainted 6.19.0-rc5 #1\n[  105.186423] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  105.186427] RIP: 0010:bpf_lwt_push_ip_encap+0x1eb/0x520\n[  105.186443] Code: 0f 84 de 01 00 00 0f b7 4a 04 66 85 c9 0f 85 47 01 00 00 31 c0 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc 48 8b 73 58 48 83 e6 fe \u003c48\u003e 8b 36 0f b7 be ec 00 00 00 0f b7 b6 e6 00 00 00 01 fe 83 e6 f0\n[  105.186449] RSP: 0018:ffffbb0e0387bc50 EFLAGS: 00010246\n[  105.186455] RAX: 000000000000004e RBX: ffff94c74e036500 RCX: ffff94c74874da00\n[  105.186460] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff94c74e036500\n[  105.186463] RBP: 0000000000000001 R08: 0000000000000002 R09: 0000000000000000\n[  105.186467] R10: ffffbb0e0387bd50 R11: 0000000000000000 R12: ffffbb0e0387bc98\n[  105.186471] R13: 0000000000000014 R14: 0000000000000000 R15: 0000000000000002\n[  105.186484] FS:  00007f166aa4d680(0000) GS:ffff94c8b7780000(0000) knlGS:0000000000000000\n[  105.186490] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  105.186494] CR2: 0000000000000000 CR3: 000000015eade001 CR4: 0000000000770ee0\n[  105.186499] PKRU: 55555554\n[  105.186502] Call Trace:\n[  105.186507]  \u003cTASK\u003e\n[  105.186513]  bpf_lwt_xmit_push_encap+0x2b/0x40\n[  105.186522]  bpf_prog_a75eaad51e517912+0x41/0x49\n[  105.186536]  ? kvm_clock_get_cycles+0x18/0x30\n[  105.186547]  ? ktime_get+0x3c/0xa0\n[  105.186554]  bpf_test_run+0x195/0x320\n[  105.186563]  ? bpf_test_run+0x10f/0x320\n[  105.186579]  bpf_prog_test_run_skb+0x2f5/0x4f0\n[  105.186590]  __sys_bpf+0x69c/0xa40\n[  105.186603]  __x64_sys_bpf+0x1e/0x30\n[  105.186611]  do_syscall_64+0x59/0x110\n[  105.186620]  entry_SYSCALL_64_after_hwframe+0x76/0xe0\n[  105.186649] RIP: 0033:0x7f166a97455d\n\nTemporarily add the setting of skb-\u003e_skb_refdst before bpf_test_run to resolve the issue.","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":"bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap","id":"CVE-2026-53111","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"wifi: rtlwifi: pci: fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet","id":"CVE-2026-53112"},"packages":[],"prev":{"headline":"s390/bpf: Zero-extend bpf prog return values and kfunc arguments","id":"CVE-2026-53110"},"products":["Linux"],"published":"2026-06-24","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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-06-24","vendors":["Linux"]},"summary":"A null pointer dereference in the Linux kernel's BPF test_run helper allows local attackers to cause a kernel crash and denial of service.","url":"https://insights.sbomify.com/CVE-2026-53111/"}