{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-49096", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49096", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T01:54:49.108Z", "updatedAt": "2026-08-05T08:53:55.150Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net: sfc: add missing xdp queue reinitialization", "summary": "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->buffer).\nBut it misses reinitializing xdp queues(efx->xdp_tx_queues).\nSo, while it is acting XDP_TX or XDP_REDIRECT, it uses the uninitialized\ntx_queue->buffer.\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 \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]", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "3990a8fffbdad5765f47ea593f9de66c91762059", "status": "affected", "versionType": "git", "lessThan": "ed7a824fda8732578d1014fad1f7fb0363705090" }, { "version": "3990a8fffbdad5765f47ea593f9de66c91762059", "status": "affected", "versionType": "git", "lessThan": "b8c46bc358d84701e7f7ffa054037db25f25da0e" }, { "version": "3990a8fffbdad5765f47ea593f9de66c91762059", "status": "affected", "versionType": "git", "lessThan": "dcc85e1593686e42c6749ef3d356db34759d59e8" }, { "version": "3990a8fffbdad5765f47ea593f9de66c91762059", "status": "affected", "versionType": "git", "lessThan": "059a47f1da93811d37533556d67e72f2261b1127" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.5" }, { "version": "5.15.34", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.16.20", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.16.*" }, { "version": "5.17.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }