{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47119","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-03-04T18:12:48.838Z","datePublished":"2024-03-15T20:14:25.901Z","dateUpdated":"2025-05-04T07:04:31.455Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:04:31.455Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix memory leak in ext4_fill_super\n\nBuffer head references must be released before calling kill_bdev();\notherwise the buffer head (and its page referenced by b_data) will not\nbe freed by kill_bdev, and subsequently that bh will be leaked.\n\nIf blocksizes differ, sb_set_blocksize() will kill current buffers and\npage cache by using kill_bdev(). And then super block will be reread\nagain but using correct blocksize this time. sb_set_blocksize() didn't\nfully free superblock page and buffer head, and being busy, they were\nnot freed and instead leaked.\n\nThis can easily be reproduced by calling an infinite loop of:\n\n  systemctl start <ext4_on_lvm>.mount, and\n  systemctl stop <ext4_on_lvm>.mount\n\n... since systemd creates a cgroup for each slice which it mounts, and\nthe bh leak get amplified by a dying memory cgroup that also never\ngets freed, and memory consumption is much more easily noticed."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"],"versions":[{"version":"ac27a0ec112a089f1a5102bc8dffc79c8c815571","lessThan":"01d349a481f0591230300a9171330136f9159bcd","status":"affected","versionType":"git"},{"version":"ac27a0ec112a089f1a5102bc8dffc79c8c815571","lessThan":"1385b23396d511d5233b8b921ac3058b3f86a5e1","status":"affected","versionType":"git"},{"version":"ac27a0ec112a089f1a5102bc8dffc79c8c815571","lessThan":"afd09b617db3786b6ef3dc43e28fe728cfea84df","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/ext4/super.c"],"versions":[{"version":"2.6.19","status":"affected"},{"version":"0","lessThan":"2.6.19","status":"unaffected","versionType":"semver"},{"version":"5.10.43","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.12.10","lessThanOrEqual":"5.12.*","status":"unaffected","versionType":"semver"},{"version":"5.13","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":"2.6.19","versionEndExcluding":"5.10.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"5.12.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/01d349a481f0591230300a9171330136f9159bcd"},{"url":"https://git.kernel.org/stable/c/1385b23396d511d5233b8b921ac3058b3f86a5e1"},{"url":"https://git.kernel.org/stable/c/afd09b617db3786b6ef3dc43e28fe728cfea84df"}],"title":"ext4: fix memory leak in ext4_fill_super","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-07-23T13:37:32.763549Z","id":"CVE-2021-47119","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-07-23T13:37:45.432Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:24:39.956Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/01d349a481f0591230300a9171330136f9159bcd","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/1385b23396d511d5233b8b921ac3058b3f86a5e1","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/afd09b617db3786b6ef3dc43e28fe728cfea84df","tags":["x_transferred"]}]}]}}