{"id":"CVE-2026-53388","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before replacing page cache folio\n\nfuse_try_move_folio() unlocks the request on entry but does not\nre-lock it on the success path","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before replacing page cache folio\n\nfuse_try_move_folio() unlocks the request on entry but does not\nre-lock it on the success path. This means fuse…","severity":"high","published":"2026-07-19","updated":"2026-07-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53388","references":[{"url":"https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53388.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-53388"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502255"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53388"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53388"},{"url":"https://lore.kernel.org/linux-cve-announce/2026071935-CVE-2026-53388-eeaf@gregkh/T"},{"url":"https://access.redhat.com/errata/RHSA-2026:89083"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-07-19T20:33:10.551Z","epss":0.00133,"epssPercentile":0.02805,"vendor":"Linux","product":"Linux","affected":["Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < 7c18691e0cfda29672f79bafde8abdb7710674f6","Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < 5927b43a4f8d89e86930f524bf63e9c7e66f61b4","Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < 030fe3e9d8abdee303dd7e9e42f45082d382a407","Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < 46473ddccdc5065033e397d6e62c280dbcd3d9c2","Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < af2892249d982a1c036ca456cc135374e68b6677","Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < 0223f452532d9cd8a5e87c45de828fd93c99bd25","Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < e28db6ac4792d065ab32565fd9f0a2361c3d4666","Linux >= ce534fb052928ce556639d7ecf01cbf4e01321e1 < a078484921052d0badd827fcc2770b5cfc1d4120","Linux 2.6.35"],"cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:30:00.282945Z"},"cvssSource":"cna","patched":["enterprise_linux_baseos_v_8","enterprise_linux_crb_v_8"],"cwe":["CWE-825"],"scores":{"cna":7.8,"vendor":7},"slug":"CVE-2026-53388","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before replacing page cache folio\n\nfuse_try_move_folio() unlocks the request on entry but does not\nre-lock it on the success path. This means fuse_chan_abort() can end the\nrequest and free the fuse_io_args (eg fuse_readpages_end()) while the\nsubsequent copy chain logic after fuse_try_move_folio() accesses the\nfuse_io_args, leading to use-after-free issues.\n\nFix this by calling lock_request() before replace_page_cache_folio().\nThis ensures the request is locked on the success path which will\nprevent the fuse_io_args from being freed while the later copying logic\nruns, and also ensures that the ap->folios[i]->mapping is never null\nsince ap->folios[i] will always point to the newfolio after\nreplace_page_cache_folio().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:89083** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:89083)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53388.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":223114,"id":"CVE-2026-53388","ts":1792172298373,"field":"cvss","old":null,"new":"7.8"},{"seq":223113,"id":"CVE-2026-53388","ts":1792172298373,"field":"severity","old":"none","new":"high"}]}