{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38710","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:24.033Z","datePublished":"2025-09-04T15:33:00.629Z","dateUpdated":"2026-05-11T21:33:29.320Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:33:29.320Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Validate i_depth for exhash directories\n\nA fuzzer test introduced corruption that ends up with a depth of 0 in\ndir_e_read(), causing an undefined shift by 32 at:\n\n  index = hash >> (32 - dip->i_depth);\n\nAs calculated in an open-coded way in dir_make_exhash(), the minimum\ndepth for an exhash directory is ilog2(sdp->sd_hash_ptrs) and 0 is\ninvalid as sdp->sd_hash_ptrs is fixed as sdp->bsize / 16 at mount time.\n\nSo we can avoid the undefined behaviour by checking for depth values\nlower than the minimum in gfs2_dinode_in(). Values greater than the\nmaximum are already being checked for there.\n\nAlso switch the calculation in dir_make_exhash() to use ilog2() to\nclarify how the depth is calculated.\n\nTested with the syzkaller repro.c and xfstests '-g quick'."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/gfs2/dir.c","fs/gfs2/glops.c"],"versions":[{"version":"9a0045088d888c9c539c8c626a366cb52c0fbdab","lessThan":"cddea0c721106ea480371412d8de21705eb27376","status":"affected","versionType":"git"},{"version":"9a0045088d888c9c539c8c626a366cb52c0fbdab","lessThan":"53a0249d68a210c16e961b83adfa82f94ee0a53d","status":"affected","versionType":"git"},{"version":"9a0045088d888c9c539c8c626a366cb52c0fbdab","lessThan":"b5f46951e62377b6e406fadc18bc3c5bdf1632a7","status":"affected","versionType":"git"},{"version":"9a0045088d888c9c539c8c626a366cb52c0fbdab","lessThan":"9680c58675b82348ab84d387e4fa727f7587e1a0","status":"affected","versionType":"git"},{"version":"9a0045088d888c9c539c8c626a366cb52c0fbdab","lessThan":"557c024ca7250bb65ae60f16c02074106c2f197b","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/gfs2/dir.c","fs/gfs2/glops.c"],"versions":[{"version":"2.6.26","status":"affected"},{"version":"0","lessThan":"2.6.26","status":"unaffected","versionType":"semver"},{"version":"6.6.134","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.43","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.15.11","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16.2","lessThanOrEqual":"6.16.*","status":"unaffected","versionType":"semver"},{"version":"6.17","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":"2.6.26","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.12.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.15.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.16.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/cddea0c721106ea480371412d8de21705eb27376"},{"url":"https://git.kernel.org/stable/c/53a0249d68a210c16e961b83adfa82f94ee0a53d"},{"url":"https://git.kernel.org/stable/c/b5f46951e62377b6e406fadc18bc3c5bdf1632a7"},{"url":"https://git.kernel.org/stable/c/9680c58675b82348ab84d387e4fa727f7587e1a0"},{"url":"https://git.kernel.org/stable/c/557c024ca7250bb65ae60f16c02074106c2f197b"}],"title":"gfs2: Validate i_depth for exhash directories","x_generator":{"engine":"bippy-1.2.0"}}}}