{ "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-2024-39301", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-39301", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-06-25T14:22:41.566Z", "updatedAt": "2026-05-11T20:20:56.953Z", "importedAt": "2026-10-24T01:57:16.009Z", "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/9p: fix uninit-value in p9_client_rpc()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/9p: fix uninit-value in p9_client_rpc()\n\nSyzbot with the help of KMSAN reported the following error:\n\nBUG: KMSAN: uninit-value in trace_9p_client_res include/trace/events/9p.h:146 [inline]\nBUG: KMSAN: uninit-value in p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\n trace_9p_client_res include/trace/events/9p.h:146 [inline]\n p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\n path_mount+0x742/0x1f20 fs/namespace.c:3679\n do_mount fs/namespace.c:3692 [inline]\n __do_sys_mount fs/namespace.c:3898 [inline]\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was created at:\n __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598\n __alloc_pages_node include/linux/gfp.h:238 [inline]\n alloc_pages_node include/linux/gfp.h:261 [inline]\n alloc_slab_page mm/slub.c:2175 [inline]\n allocate_slab mm/slub.c:2338 [inline]\n new_slab+0x2de/0x1400 mm/slub.c:2391\n ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525\n __slab_alloc mm/slub.c:3610 [inline]\n __slab_alloc_node mm/slub.c:3663 [inline]\n slab_alloc_node mm/slub.c:3835 [inline]\n kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852\n p9_tag_alloc net/9p/client.c:278 [inline]\n p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641\n p9_client_rpc+0x27e/0x1340 net/9p/client.c:688\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\n path_mount+0x742/0x1f20 fs/namespace.c:3679\n do_mount fs/namespace.c:3692 [inline]\n __do_sys_mount fs/namespace.c:3898 [inline]\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nIf p9_check_errors() fails early in p9_client_rpc(), req->rc.tag\nwill not be properly initialized. However, trace_9p_client_res()\nends up trying to print it out anyway before p9_client_rpc()\nfinishes.\n\nFix this issue by assigning default values to p9_fcall fields\nsuch as 'tag' and (just in case KMSAN unearths something new) 'id'\nduring the tag allocation stage.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "72c5d8e416ecc46af370a1340b3db5ff0b0cc867" }, { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "2101901dd58c6da4924bc5efb217a1d83436290b" }, { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "124947855564572713d705a13be7d0c9dae16a17" }, { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "89969ffbeb948ffc159d19252e7469490103011b" }, { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "ca71f204711ad24113e8b344dc5bb8b0385f5672" }, { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "6c1791130b781c843572fb6391c4a4c5d857ab17" }, { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "fe5c604053c36c62af24eee8a76407d026ea5163" }, { "version": "348b59012e5c6402741d067cf6eeeb6271999d06", "status": "affected", "versionType": "git", "lessThan": "25460d6f39024cc3b8241b14c7ccf0d6f11a736a" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.2", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.2" }, { "version": "4.19.316", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.278", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.219", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.161", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.94", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.34", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.9.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.9.*" }, { "version": "6.10", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }