CVE-2026-46118

{"id": "CVE-2026-46118", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "09c15bbbed533903e600660ea09098b3b0524f48", "lessThan": "735439394dde8462f9b50566727fbe333beaadaf", "versionType": "git"}, {"status": "affected", "version": "6d3789d347a7af5c4b0b2da3af47b8d9da607ab2", "lessThan": "cf51bec1560f8bf115d1476f60335f9d90e110b0", "versionType": "git"}, {"status": "affected", "version": "6d3789d347a7af5c4b0b2da3af47b8d9da607ab2", "lessThan": "1b9f7aafa44f5ce852c00509104d10fd9eb0f402", "versionType": "git"}, {"status": "affected", "version": "6.18.32", "lessThan": "6.18.33", "versionType": "semver"}], "programFiles": ["arch/powerpc/platforms/pseries/papr-hvpipe.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"status": "unaffected", "version": "0", "lessThan": "6.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.33", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.7", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/powerpc/platforms/pseries/papr-hvpipe.c"], "defaultStatus": "affected"}]}], "published": "2026-05-28T10:16:27.293", "references": [{"url": "https://git.kernel.org/stable/c/1b9f7aafa44f5ce852c00509104d10fd9eb0f402", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/735439394dde8462f9b50566727fbe333beaadaf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cf51bec1560f8bf115d1476f60335f9d90e110b0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npseries/papr-hvpipe: Fix null ptr deref in papr_hvpipe_dev_create_handle()\n\ncommit 6d3789d347a7 (\"papr-hvpipe: convert papr_hvpipe_dev_create_handle() to FD_PREPARE()\"),\nchanged the create handle to FD_PREPARE(), but it caused kernel\nnull-ptr-deref because after call to retain_and_null_ptr(src_info),\nsrc_info is re-used for adding it to the global list.\n\nGetting the following kernel panic in papr_hvpipe_dev_create_handle()\nwhen trying to add src_info to the list.\n Kernel attempted to write user page (0) - exploit attempt? (uid: 0)\n BUG: Kernel NULL pointer dereference on write at 0x00000000\n Faulting instruction address: 0xc0000000001b44a0\n Oops: Kernel access of bad area, sig: 11 [#1]\n ...\n Call Trace:\n papr_hvpipe_dev_ioctl+0x1f4/0x48c (unreliable)\n sys_ioctl+0x528/0x1064\n system_call_exception+0x128/0x360\n system_call_vectored_common+0x15c/0x2ec\n\nNow, the error handling with FD_PREPARE's file cleanup and __free(kfree) auto\ncleanup is getting too convoluted. This is mainly because we need to\nensure only 1 user get the srcID handle. To simplify this, we allocate\nprepare the src_info in the beginning and add it to the global list\nunder a spinlock after checking that no duplicates exist.\n\nThis simplify the error handling where if the FD_ADD fails, we can\nsimply remove the src_info from the list and consume any pending msg in\nhvpipe to be cleared, after src_info became visible in the global list."}], "lastModified": "2026-06-24T16:59:50.580", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.18.32:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C7375BE8-4505-4CEB-AA0F-F5D7B9AB272F"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}