{"id":"CVE-2026-63957","state":"PUBLISHED","title":"USB: serial: safe_serial: fix memory corruption with small endpoint","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: safe_serial: fix memory corruption with small endpoint\n\nMake sure that the bulk-out buffer size is at least eight bytes to avoid\nuser-controlled slab corruption in \"safe\" mode should a malicious device\nreport a smaller size.","publishedAt":"2026-07-19T14:55:48.196Z","updatedAt":"2026-07-19T14:55:48.196Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"e3a1d6eee25dc96b1d2db0ecd9d8741e92056476","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"c7336c0fba5c959249f3d793d33076b992ec3ee4","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"161ea0e5236f5f051d2d85d6c54dd08ee9dc7ba4","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"9b3145b3001fb24de1da72d1deb0bea70e5a078b","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"a550ed2117ca4709d38f713933ff924a83942e41","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"f793b67d41e5fab719c5a90baa77cbd2fe259517","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"857b3cc73f91871ae4433f8b97c4670b78f8dc96","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"438061ed1ad85e6743e2dce826671772d81089ec","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/serial/safe_serial.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.12","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.93","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/serial/safe_serial.c"]}],"references":["https://git.kernel.org/stable/c/e3a1d6eee25dc96b1d2db0ecd9d8741e92056476","https://git.kernel.org/stable/c/c7336c0fba5c959249f3d793d33076b992ec3ee4","https://git.kernel.org/stable/c/161ea0e5236f5f051d2d85d6c54dd08ee9dc7ba4","https://git.kernel.org/stable/c/9b3145b3001fb24de1da72d1deb0bea70e5a078b","https://git.kernel.org/stable/c/a550ed2117ca4709d38f713933ff924a83942e41","https://git.kernel.org/stable/c/f793b67d41e5fab719c5a90baa77cbd2fe259517","https://git.kernel.org/stable/c/857b3cc73f91871ae4433f8b97c4670b78f8dc96","https://git.kernel.org/stable/c/438061ed1ad85e6743e2dce826671772d81089ec"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63957.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63957","state":"PUBLISHED","datePublished":"2026-07-19T14:55:48.196Z","dateUpdated":"2026-07-19T14:55:48.196Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.023Z"},"containers":{"cna":{"title":"USB: serial: safe_serial: fix memory corruption with small endpoint","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: safe_serial: fix memory corruption with small endpoint\n\nMake sure that the bulk-out buffer size is at least eight bytes to avoid\nuser-controlled slab corruption in \"safe\" mode should a malicious device\nreport a smaller size."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"e3a1d6eee25dc96b1d2db0ecd9d8741e92056476","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"c7336c0fba5c959249f3d793d33076b992ec3ee4","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"161ea0e5236f5f051d2d85d6c54dd08ee9dc7ba4","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"9b3145b3001fb24de1da72d1deb0bea70e5a078b","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"a550ed2117ca4709d38f713933ff924a83942e41","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"f793b67d41e5fab719c5a90baa77cbd2fe259517","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"857b3cc73f91871ae4433f8b97c4670b78f8dc96","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"438061ed1ad85e6743e2dce826671772d81089ec","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/serial/safe_serial.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.12","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.93","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/serial/safe_serial.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e3a1d6eee25dc96b1d2db0ecd9d8741e92056476"},{"url":"https://git.kernel.org/stable/c/c7336c0fba5c959249f3d793d33076b992ec3ee4"},{"url":"https://git.kernel.org/stable/c/161ea0e5236f5f051d2d85d6c54dd08ee9dc7ba4"},{"url":"https://git.kernel.org/stable/c/9b3145b3001fb24de1da72d1deb0bea70e5a078b"},{"url":"https://git.kernel.org/stable/c/a550ed2117ca4709d38f713933ff924a83942e41"},{"url":"https://git.kernel.org/stable/c/f793b67d41e5fab719c5a90baa77cbd2fe259517"},{"url":"https://git.kernel.org/stable/c/857b3cc73f91871ae4433f8b97c4670b78f8dc96"},{"url":"https://git.kernel.org/stable/c/438061ed1ad85e6743e2dce826671772d81089ec"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-19T14:55:48.196Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.12.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.18.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"7.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}