{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-39276","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-06-24T13:53:25.552Z","datePublished":"2024-06-25T14:22:38.886Z","dateUpdated":"2025-05-04T12:56:59.037Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T12:56:59.037Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()\n\nSyzbot reports a warning as follows:\n\n============================================\nWARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290\nModules linked in:\nCPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7\nRIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419\nCall Trace:\n <TASK>\n ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375\n generic_shutdown_super+0x136/0x2d0 fs/super.c:641\n kill_block_super+0x44/0x90 fs/super.c:1675\n ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327\n[...]\n============================================\n\nThis is because when finding an entry in ext4_xattr_block_cache_find(), if\next4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown\nin the __entry_find(), won't be put away, and eventually trigger the above\nissue in mb_cache_destroy() due to reference count leakage.\n\nSo call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/xattr.c"],"versions":[{"version":"b878c8a7f08f0c225b6a46ba1ac867e9c5d17807","lessThan":"9ad75e78747b5a50dc5a52f0f8e92e920a653f16","status":"affected","versionType":"git"},{"version":"fb265c9cb49e2074ddcdd4de99728aefdd3b3592","lessThan":"896a7e7d0d555ad8b2b46af0c2fa7de7467f9483","status":"affected","versionType":"git"},{"version":"fb265c9cb49e2074ddcdd4de99728aefdd3b3592","lessThan":"76dc776153a47372719d664e0fc50d6355791abb","status":"affected","versionType":"git"},{"version":"fb265c9cb49e2074ddcdd4de99728aefdd3b3592","lessThan":"681ff9a09accd8a4379f8bd30b7a1641ee19bb3e","status":"affected","versionType":"git"},{"version":"fb265c9cb49e2074ddcdd4de99728aefdd3b3592","lessThan":"e941b712e758f615d311946bf98216e79145ccd9","status":"affected","versionType":"git"},{"version":"fb265c9cb49e2074ddcdd4de99728aefdd3b3592","lessThan":"a95df6f04f2c37291adf26a74205cde0314d4577","status":"affected","versionType":"git"},{"version":"fb265c9cb49e2074ddcdd4de99728aefdd3b3592","lessThan":"b37c0edef4e66fb21a2fbc211471195a383e5ab8","status":"affected","versionType":"git"},{"version":"fb265c9cb49e2074ddcdd4de99728aefdd3b3592","lessThan":"0c0b4a49d3e7f49690a6827a41faeffad5df7e21","status":"affected","versionType":"git"},{"version":"9da1f6d06b7a6d068e68fcfd7cbbf6b586d888e1","status":"affected","versionType":"git"},{"version":"81313ed2c705d958744882a269bf4a5e3ddec95e","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/xattr.c"],"versions":[{"version":"5.0","status":"affected"},{"version":"0","lessThan":"5.0","status":"unaffected","versionType":"semver"},{"version":"4.19.316","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.278","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.219","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.161","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.94","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.34","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.9.5","lessThanOrEqual":"6.9.*","status":"unaffected","versionType":"semver"},{"version":"6.10","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":"4.19.14","versionEndExcluding":"4.19.316"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.4.278"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.10.219"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.15.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.1.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.6.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.9.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16"},{"url":"https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483"},{"url":"https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb"},{"url":"https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e"},{"url":"https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9"},{"url":"https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577"},{"url":"https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8"},{"url":"https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21"}],"title":"ext4: 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