{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2022-49096 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2022-49096 is a high-severity vulnerability in Linux kernel, published on 26 Feb 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-2022-49096 and fix it if it is affected.\n\nWhat it is: CVE-2022-49096 is a high-severity vulnerability in Linux kernel, published on 26 Feb 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-2022-49096 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-2022-49096/ (Markdown: https://insights.sbomify.com/CVE-2022-49096/index.md)","id":"CVE-2022-49096","markdown":"https://insights.sbomify.com/CVE-2022-49096/index.md","name":"CVE-2022-49096","record":{"aliases":["DEBIAN-CVE-2022-49096","GHSA-24mj-3qxv-928j","ROOT-OS-DEBIAN-11-CVE-2022-49096","UBUNTU-CVE-2022-49096"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"low_privilege","summary":"A missing reinitialization in the sfc network driver causes a kernel panic via null pointer dereference when XDP actions occur after ring buffer resizing.","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":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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\nnet: sfc: add missing xdp queue reinitialization\n\nAfter rx/tx ring buffer size is changed, kernel panic occurs when\nit acts XDP_TX or XDP_REDIRECT.\n\nWhen tx/rx ring buffer size is changed(ethtool -G), sfc driver\nreallocates and reinitializes rx and tx queues and their buffer\n(tx_queue-\u003ebuffer).\nBut it misses reinitializing xdp queues(efx-\u003exdp_tx_queues).\nSo, while it is acting XDP_TX or XDP_REDIRECT, it uses the uninitialized\ntx_queue-\u003ebuffer.\n\nA new function efx_set_xdp_channels() is separated from efx_set_channels()\nto handle only xdp queues.\n\nSplat looks like:\n   BUG: kernel NULL pointer dereference, address: 000000000000002a\n   #PF: supervisor write access in kernel mode\n   #PF: error_code(0x0002) - not-present page\n   PGD 0 P4D 0\n   Oops: 0002 [#4] PREEMPT SMP NOPTI\n   RIP: 0010:efx_tx_map_chunk+0x54/0x90 [sfc]\n   CPU: 2 PID: 0 Comm: swapper/2 Tainted: G      D           5.17.0+ #55 e8beeee8289528f11357029357cf\n   Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80\n   RSP: 0018:ffff92f121e45c60 EFLAGS: 00010297\n   RIP: 0010:efx_tx_map_chunk+0x54/0x90 [sfc]\n   RAX: 0000000000000040 RBX: ffff92ea506895c0 RCX: ffffffffc0330870\n   RDX: 0000000000000001 RSI: 00000001139b10ce RDI: ffff92ea506895c0\n   RBP: ffffffffc0358a80 R08: 00000001139b110d R09: 0000000000000000\n   R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040\n   R13: 0000000000000018 R14: 00000001139b10ce R15: ffff92ea506895c0\n   FS:  0000000000000000(0000) GS:ffff92f121ec0000(0000) knlGS:0000000000000000\n   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n   Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80\n   CR2: 000000000000002a CR3: 00000003e6810004 CR4: 00000000007706e0\n   RSP: 0018:ffff92f121e85c60 EFLAGS: 00010297\n   PKRU: 55555554\n   RAX: 0000000000000040 RBX: ffff92ea50689700 RCX: ffffffffc0330870\n   RDX: 0000000000000001 RSI: 00000001145a90ce RDI: ffff92ea50689700\n   RBP: ffffffffc0358a80 R08: 00000001145a910d R09: 0000000000000000\n   R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040\n   R13: 0000000000000018 R14: 00000001145a90ce R15: ffff92ea50689700\n   FS:  0000000000000000(0000) GS:ffff92f121e80000(0000) knlGS:0000000000000000\n   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n   CR2: 000000000000002a CR3: 00000003e6810005 CR4: 00000000007706e0\n   PKRU: 55555554\n   Call Trace:\n    \u003cIRQ\u003e\n    efx_xdp_tx_buffers+0x12b/0x3d0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]\n    __efx_rx_packet+0x5c3/0x930 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]\n    efx_rx_packet+0x28c/0x2e0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]\n    efx_ef10_ev_process+0x5f8/0xf40 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]\n    ? enqueue_task_fair+0x95/0x550\n    efx_poll+0xc4/0x360 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]","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: sfc: add missing xdp queue reinitialization","id":"CVE-2022-49096","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2022"},"n_packages":0,"n_references":4,"next":{"headline":"NFS: Avoid writeback threads getting stuck in mempool_alloc()","id":"CVE-2022-49097"},"packages":[],"prev":{"headline":"scsi: zorro7xx: Fix a resource leak in zorro7xx_remove_one()","id":"CVE-2022-49095"},"products":["Linux"],"published":"2025-02-26","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A missing reinitialization in the sfc network driver causes a kernel panic via null pointer dereference when XDP actions occur after ring buffer resizing.","url":"https://insights.sbomify.com/CVE-2022-49096/"}