{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31624","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.124Z","datePublished":"2026-04-24T14:42:41.655Z","dateUpdated":"2026-05-11T22:12:24.557Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:12:24.557Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: clamp report_size in s32ton() to avoid undefined shift\n\ns32ton() shifts by n-1 where n is the field's report_size, a value that\ncomes directly from a HID device.  The HID parser bounds report_size\nonly to <= 256, so a broken HID device can supply a report descriptor\nwith a wide field that triggers shift exponents up to 256 on a 32-bit\ntype when an output report is built via hid_output_field() or\nhid_set_field().\n\nCommit ec61b41918587 (\"HID: core: fix shift-out-of-bounds in\nhid_report_raw_event\") added the same n > 32 clamp to the function\nsnto32(), but s32ton() was never given the same fix as I guess syzbot\nhadn't figured out how to fuzz a device the same way.\n\nFix this up by just clamping the max value of n, just like snto32()\ndoes."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"],"versions":[{"version":"dde5845a529ff753364a6d1aea61180946270bfa","lessThan":"932ae5309e53561197aa7d1606c7cf63af10e24f","status":"affected","versionType":"git"},{"version":"dde5845a529ff753364a6d1aea61180946270bfa","lessThan":"58386f00af710922cafb0fb69211497beddfaa95","status":"affected","versionType":"git"},{"version":"dde5845a529ff753364a6d1aea61180946270bfa","lessThan":"8a8333237f1f5caab8d4c3d2c2e7578c4263a97f","status":"affected","versionType":"git"},{"version":"dde5845a529ff753364a6d1aea61180946270bfa","lessThan":"ea363a34086ddb4231adc581a7f36c39ec154bfc","status":"affected","versionType":"git"},{"version":"dde5845a529ff753364a6d1aea61180946270bfa","lessThan":"97014719bb8fccb1ffcbbc299e84b1f11b114195","status":"affected","versionType":"git"},{"version":"dde5845a529ff753364a6d1aea61180946270bfa","lessThan":"69c02ffde6ed4d535fa4e693a9e572729cad3d0d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"],"versions":[{"version":"2.6.20","status":"affected"},{"version":"0","lessThan":"2.6.20","status":"unaffected","versionType":"semver"},{"version":"6.6.136","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.83","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0.1","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1-rc1","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":"2.6.20","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.20","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.20","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.20","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.20","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.20","versionEndExcluding":"7.1-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f"},{"url":"https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95"},{"url":"https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f"},{"url":"https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc"},{"url":"https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195"},{"url":"https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d"}],"title":"HID: core: clamp report_size in s32ton() to avoid undefined shift","x_generator":{"engine":"bippy-1.2.0"}}}}