CVE-2026-98961

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98961", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.382Z", "datePublished": "2026-10-23T12:19:29.616Z", "dateUpdated": "2026-10-23T12:19:29.616Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:19:29.616Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: unlock inode and extent in caller when io_uring read extent fails\n\nbtrfs_uring_read_extent() runs only after btrfs_encoded_read() has taken\nthe inode shared lock and the extent lock. On failure it used to unlock\nin out_fail, and a pages-array allocation failure returned -ENOMEM\nwithout unlocking at all.\n\nUnlock in the caller instead on all failure returns, matching the\ncopy_to_user() error path. The deferred -EIOCBQUEUED path still unlocks\nin btrfs_uring_read_finished()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/ioctl.c"], "versions": [{"version": "34310c442e175f286b4c06ab5caa4e0b267ea31c", "lessThan": "2797eb38773a96914ccedeec71eb2144645400b2", "status": "affected", "versionType": "git"}, {"version": "34310c442e175f286b4c06ab5caa4e0b267ea31c", "lessThan": "ada1fc725a4db407294ae90a0d40ef1c46f457f2", "status": "affected", "versionType": "git"}, {"version": "34310c442e175f286b4c06ab5caa4e0b267ea31c", "lessThan": "b6e8add5d79d1f6f819a054c833bab452bd7365d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/ioctl.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2797eb38773a96914ccedeec71eb2144645400b2"}, {"url": "https://git.kernel.org/stable/c/ada1fc725a4db407294ae90a0d40ef1c46f457f2"}, {"url": "https://git.kernel.org/stable/c/b6e8add5d79d1f6f819a054c833bab452bd7365d"}], "title": "btrfs: unlock inode and extent in caller when io_uring read extent fails", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/btrfs/ioctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2797eb38773a96914ccedeec71eb2144645400b2", "status": "affected", "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c", "versionType": "git"}, {"lessThan": "ada1fc725a4db407294ae90a0d40ef1c46f457f2", "status": "affected", "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c", "versionType": "git"}, {"lessThan": "b6e8add5d79d1f6f819a054c833bab452bd7365d", "status": "affected", "version": "34310c442e175f286b4c06ab5caa4e0b267ea31c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/btrfs/ioctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: unlock inode and extent in caller when io_uring read extent fails\n\nbtrfs_uring_read_extent() runs only after btrfs_encoded_read() has taken\nthe inode shared lock and the extent lock. On failure it used to unlock\nin out_fail, and a pages-array allocation failure returned -ENOMEM\nwithout unlocking at all.\n\nUnlock in the caller instead on all failure returns, matching the\ncopy_to_user() error path. The deferred -EIOCBQUEUED path still unlocks\nin btrfs_uring_read_finished()."}], "id": "CVE-2026-98961", "lastModified": "2026-10-23T13:17:17.500", "metrics": {}, "published": "2026-10-23T13:17:17.500", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2797eb38773a96914ccedeec71eb2144645400b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ada1fc725a4db407294ae90a0d40ef1c46f457f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b6e8add5d79d1f6f819a054c833bab452bd7365d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: btrfs: unlock inode and extent in caller when io_uring read extent fails", "id": "2559629", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559629"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: unlock inode and extent in caller when io_uring read extent fails\nbtrfs_uring_read_extent() runs only after btrfs_encoded_read() has taken\nthe inode shared lock and the extent lock. On failure it used to unlock\nin out_fail, and a pages-array allocation failure returned -ENOMEM\nwithout unlocking at all.\nUnlock in the caller instead on all failure returns, matching the\ncopy_to_user() error path. The deferred -EIOCBQUEUED path still unlocks\nin btrfs_uring_read_finished().", "A flaw was found in the Linux kernel's Btrfs file system. A local attacker can cause a Denial of Service (DoS) by triggering error conditions during asynchronous read operations. When an io_uring read request fails, such as during a memory allocation failure, the kernel does not release acquired internal file locks. This failure results in a deadlock that freezes file system operations and leaves the system unresponsive."], "name": "CVE-2026-98961", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98961\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98961\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98961.mbox"], "threat_severity": "Moderate"}

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