{ "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-2022-49605", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49605", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:23:30.873Z", "updatedAt": "2026-05-11T19:03:10.974Z", "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": "igc: Reinstate IGC_REMOVED logic and implement it properly", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nigc: Reinstate IGC_REMOVED logic and implement it properly\n\nThe initially merged version of the igc driver code (via commit\n146740f9abc4, \"igc: Add support for PF\") contained the following\nIGC_REMOVED checks in the igc_rd32/wr32() MMIO accessors:\n\n\tu32 igc_rd32(struct igc_hw *hw, u32 reg)\n\t{\n\t\tu8 __iomem *hw_addr = READ_ONCE(hw->hw_addr);\n\t\tu32 value = 0;\n\n\t\tif (IGC_REMOVED(hw_addr))\n\t\t\treturn ~value;\n\n\t\tvalue = readl(&hw_addr[reg]);\n\n\t\t/* reads should not return all F's */\n\t\tif (!(~value) && (!reg || !(~readl(hw_addr))))\n\t\t\thw->hw_addr = NULL;\n\n\t\treturn value;\n\t}\n\nAnd:\n\n\t#define wr32(reg, val) \\\n\tdo { \\\n\t\tu8 __iomem *hw_addr = READ_ONCE((hw)->hw_addr); \\\n\t\tif (!IGC_REMOVED(hw_addr)) \\\n\t\t\twritel((val), &hw_addr[(reg)]); \\\n\t} while (0)\n\nE.g. igb has similar checks in its MMIO accessors, and has a similar\nmacro E1000_REMOVED, which is implemented as follows:\n\n\t#define E1000_REMOVED(h) unlikely(!(h))\n\nThese checks serve to detect and take note of an 0xffffffff MMIO read\nreturn from the device, which can be caused by a PCIe link flap or some\nother kind of PCI bus error, and to avoid performing MMIO reads and\nwrites from that point onwards.\n\nHowever, the IGC_REMOVED macro was not originally implemented:\n\n\t#ifndef IGC_REMOVED\n\t#define IGC_REMOVED(a) (0)\n\t#endif /* IGC_REMOVED */\n\nThis led to the IGC_REMOVED logic to be removed entirely in a\nsubsequent commit (commit 3c215fb18e70, \"igc: remove IGC_REMOVED\nfunction\"), with the rationale that such checks matter only for\nvirtualization and that igc does not support virtualization -- but a\nPCIe device can become detached even without virtualization being in\nuse, and without proper checks, a PCIe bus error affecting an igc\nadapter will lead to various NULL pointer dereferences, as the first\naccess after the error will set hw->hw_addr to NULL, and subsequent\naccesses will blindly dereference this now-NULL pointer.\n\nThis patch reinstates the IGC_REMOVED checks in igc_rd32/wr32(), and\nimplements IGC_REMOVED the way it is done for igb, by checking for the\nunlikely() case of hw_addr being NULL. This change prevents the oopses\nseen when a PCIe link flap occurs on an igc adapter.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "146740f9abc4976e4f0af1aa302efee1c699d2e4", "status": "affected", "versionType": "git", "lessThan": "16cb6717f4f42487ef10583eb8bc98e7d1e33d65" }, { "version": "146740f9abc4976e4f0af1aa302efee1c699d2e4", "status": "affected", "versionType": "git", "lessThan": "77836dbe35382aaf8108489060c5c89530c77494" }, { "version": "146740f9abc4976e4f0af1aa302efee1c699d2e4", "status": "affected", "versionType": "git", "lessThan": "e75b73081f1ec169518773626c2ff3950476660b" }, { "version": "146740f9abc4976e4f0af1aa302efee1c699d2e4", "status": "affected", "versionType": "git", "lessThan": "70965b6e5c03aa70cc754af1226b9f9cde0c4bf3" }, { "version": "146740f9abc4976e4f0af1aa302efee1c699d2e4", "status": "affected", "versionType": "git", "lessThan": "7c1ddcee5311f3315096217881d2dbe47cc683f9" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.20", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.20" }, { "version": "5.4.208", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.134", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.58", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.18.15", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }