{"id":"CVE-2026-98446","published":"2026-10-18T16:16:54.937","lastModified":"2026-10-19T10:18:53.727","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't let hidden_space go negative in xfs_metafile_resv_init\n\nLOLLM points out that if the amount of fdblocks that we can reserve for\na metadata btree file goes below the space already used by that file,\nthen the hidden_space subtraction can underflow, causing\nxfs_dec_fdblocks to subtract a huge amount of space.  We never want the\ntarget to be less than the used sapce, so fix the logic that adjusts\ndblocks_avail downwards.\n\nAlso fix an error in the adjacent comment.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/476582d754cdc5110f806001417fea6c77824c13","tags":[]},{"url":"https://git.kernel.org/stable/c/930a9c1c321efdaa3e7f8caecb0479cee3baf342","tags":[]},{"url":"https://git.kernel.org/stable/c/f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}