{ "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-2022-49649", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49649", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:23:52.531Z", "updatedAt": "2026-05-11T19:04:01.385Z", "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": "xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue\n\nxenvif_rx_next_skb() is expecting the rx queue not being empty, but\nin case the loop in xenvif_rx_action() is doing multiple iterations,\nthe availability of another skb in the rx queue is not being checked.\n\nThis can lead to crashes:\n\n[40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080\n[40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.537534] PGD 0 P4D 0\n[40072.537644] Oops: 0000 [#1] SMP NOPTI\n[40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5\n[40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021\n[40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000\n[40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246\n[40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7\n[40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8\n[40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008\n[40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708\n[40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0\n[40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000\n[40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033\n[40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660\n[40072.539211] Call Trace:\n[40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback]\n[40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback]\n\nFix that by stopping the loop in case the rx queue becomes empty.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "c0fcceb5f3f1ec197c014fe218c2f28108cacd27" }, { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "d5320c6a27aa975aff740f9cb481dcbde48f4348" }, { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "5a071aefd6414af5a20321ab58a0557b81993687" }, { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "7425479d20f9e96f7c3ec8e8a93fe0d7478724cb" }, { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "b9c32a6886af79d6e0ad87a7b01800ed079cdd02" }, { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "b99174ac57fe5d8867448c03b23828e63f24cb1c" }, { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "f0b5c819b062df8bf5f2acf4697e3871cb3722da" }, { "version": "98f6d57ced73b723551568262019f1d6c8771f20", "status": "affected", "versionType": "git", "lessThan": "94e8100678889ab428e68acadf042de723f094b9" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.9", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.9" }, { "version": "4.9.324", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.289", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.253", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.207", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.132", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.56", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.18.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }