{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-98119","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2026-09-25T11:17:43.140","lastModified":"2026-10-26T18:36:45.120","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: break unbuffered write when netfs_alloc_subrequest() fails\n\nsyzbot reported a null-ptr-deref below [1] following a fault injection in\nnetfs_alloc_subrequest(). [0]\n\nWhen netfs_alloc_subrequest() fails, subreq is NULL.\nLater, netfs_prepare_write() tries to initialize members of\nsubreq(e.g., source), the issue in [1] is triggered.\n\nLet's handle the error of netfs_prepare_write() properly.\n\n[0]\nFAULT_INJECTION: forcing a failure.\nname failslab, interval 1, probability 0, space 0, times 0\nCall Trace:\n netfs_alloc_subrequest+0x116/0x3f0\n netfs_prepare_write+0x76/0x7b0\n netfs_unbuffered_write+0x75c/0x2020\n netfs_unbuffered_write_iter_locked+0x7d6/0xa80\n netfs_unbuffered_write_iter+0x442/0x720\n v9fs_file_write_iter+0xbf/0x100\n vfs_write+0x6ac/0x1050\n\n[1]\nKASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af]\nRIP: 0010:netfs_prepare_write+0xbc/0x7b0 fs/netfs/write_issue.c:173\nCall Trace:\n netfs_unbuffered_write+0x75c/0x2020 fs/netfs/direct_write.c:111\n netfs_unbuffered_write_iter_locked+0x7d6/0xa80 fs/netfs/direct_write.c:290\n netfs_unbuffered_write_iter+0x442/0x720 fs/netfs/direct_write.c:382\n v9fs_file_write_iter+0xbf/0x100 fs/9p/vfs_file.c:409\n new_sync_write fs/read_write.c:595 [inline]"}],"affected":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","affectedData":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/netfs/direct_write.c","fs/netfs/write_issue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"288ace2f57c9d06dd2e42bd80d03747d879a4068","lessThan":"cf6f93b8b06acf57de62dacbe71a3b99c68656a7","versionType":"git","status":"affected"},{"version":"288ace2f57c9d06dd2e42bd80d03747d879a4068","lessThan":"19f246c795e940dc5f11cd5bc0cb1e81bc7b7090","versionType":"git","status":"affected"},{"version":"288ace2f57c9d06dd2e42bd80d03747d879a4068","lessThan":"8fb45a934661419c04a44d4cfea1e0df7dcf2805","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/netfs/direct_write.c","fs/netfs/write_issue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.10","status":"affected"},{"version":"0","lessThan":"6.10","versionType":"semver","status":"unaffected"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","versionType":"semver","status":"unaffected"},{"version":"7.3","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.53","matchCriteriaId":"7F5A55DD-A705-4265-8B89-11220B904283"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.2.7","matchCriteriaId":"19917B2D-B4B2-4416-A482-9C7C4929A921"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.3:rc1:*:*:*:*:*:*","matchCriteriaId":"11E35E1B-5DB4-4AB9-9706-CD73B799EADF"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.3:rc2:*:*:*:*:*:*","matchCriteriaId":"14FD7B9A-4946-4511-8E63-6E13870CD4A8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/19f246c795e940dc5f11cd5bc0cb1e81bc7b7090","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8fb45a934661419c04a44d4cfea1e0df7dcf2805","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cf6f93b8b06acf57de62dacbe71a3b99c68656a7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}