{"id":"CVE-2022-49611","title":"x86/speculation: Fill RSB on vmexit for IBRS","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/speculation: Fill RSB on vmexit for IBRS\n\nPrevent RSB underflow/poisoning attacks with RSB.  While at it, add a\nbunch of comments to attempt to document the current…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= b9cdaaf0a3becc52e8b4662fef28c452c4f009b4 < 3d323b99ff5c8c57005184056d65f6af5b0479d8","Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < f744b88dfc201bf8092833ec70b23c720188b527","Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0","Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153","Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 8d5cff499a6d740c91ff37963907e0e983c37f0f","Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 8c38306e2e9257af4af2819aa287a4711ff36329","Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 9756bba28470722dacb79ffce554336dd1f6a6cd","Linux 68d1f7a3f1a35639a563bbad768d5df885b4ff05","Linux 20e080e2752d108388d386ecc0b33d7797dfb18f","Linux eebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4","Linux c1ddd99a029636e234a800f28790a60d6ac0318f","Linux >= 4.14.14 < 4.14.297","Linux >= 3.2.101 < 3.3","Linux >= 3.16.56 < 3.17","Linux >= 4.4.113 < 4.5","Linux >= 4.9.77 < 4.10","Linux 4.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:46:15.314111Z"},"published":"2025-02-26","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:40.677Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49611","references":[{"url":"https://git.kernel.org/stable/c/3d323b99ff5c8c57005184056d65f6af5b0479d8"},{"url":"https://git.kernel.org/stable/c/f744b88dfc201bf8092833ec70b23c720188b527"},{"url":"https://git.kernel.org/stable/c/17a9fc4a7b91f8599223631bb6ae6416bc0de1c0"},{"url":"https://git.kernel.org/stable/c/4d7f72b6e1bc630bec7e4cd51814bc2b092bf153"},{"url":"https://git.kernel.org/stable/c/8d5cff499a6d740c91ff37963907e0e983c37f0f"},{"url":"https://git.kernel.org/stable/c/8c38306e2e9257af4af2819aa287a4711ff36329"},{"url":"https://git.kernel.org/stable/c/9756bba28470722dacb79ffce554336dd1f6a6cd"}],"tags":["cve.org"],"epss":0.00284,"epssPercentile":0.21093,"ingestedAt":"2026-11-05T22:38:31.578Z","slug":"CVE-2022-49611","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nx86/speculation: Fill RSB on vmexit for IBRS\n\nPrevent RSB underflow/poisoning attacks with RSB.  While at it, add a\nbunch of comments to attempt to document the current state of tribal\nknowledge about RSB attacks and what exactly is being mitigated.\n\n## Affected\n\n- `Linux >= b9cdaaf0a3becc52e8b4662fef28c452c4f009b4 < 3d323b99ff5c8c57005184056d65f6af5b0479d8`\n- `Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < f744b88dfc201bf8092833ec70b23c720188b527`\n- `Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0`\n- `Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153`\n- `Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 8d5cff499a6d740c91ff37963907e0e983c37f0f`\n- `Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 8c38306e2e9257af4af2819aa287a4711ff36329`\n- `Linux >= 117cc7a908c83697b0b737d15ae1eb5943afe35b < 9756bba28470722dacb79ffce554336dd1f6a6cd`\n- `Linux 68d1f7a3f1a35639a563bbad768d5df885b4ff05`\n- `Linux 20e080e2752d108388d386ecc0b33d7797dfb18f`\n- `Linux eebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4`\n- `Linux c1ddd99a029636e234a800f28790a60d6ac0318f`\n- `Linux >= 4.14.14 < 4.14.297`\n- `Linux >= 3.2.101 < 3.3`\n- `Linux >= 3.16.56 < 3.17`\n- `Linux >= 4.4.113 < 4.5`\n- `Linux >= 4.9.77 < 4.10`\n- `Linux 4.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}