{"id":"CVE-2026-89864","state":"PUBLISHED","title":"scsi: qla2xxx: Bound i2c->length in I2C bsg handlers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Bound i2c->length in I2C bsg handlers\n\nstruct qla_i2c_access carries a 16-bit length field alongside a fixed\n64-byte buffer:\n\n\tstruct qla_i2c_access {\n\t\tuint16_t device, offset, option, length;\n\t\tuint8_t  buffer[0x40];\n\t} __packed;\n\nqla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied\ni2c->length without any bounds check. i2c is overlaid on a 256-byte\non-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to\n65535 overruns both:\n\n  - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and\n    over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs\n    i2c->length bytes out of the 256-byte buffer.\n  - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp,\n    then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte\n    buffer inside the on-stack array.\n\nA caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the\nkernel stack. Reject requests whose length exceeds the buffer before any\ncopy or DMA transfer in both handlers.","publishedAt":"2026-09-16T10:31:35.068Z","updatedAt":"2026-10-19T08:53:57.594Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"8f01f886cc5e7bbc16cbf1a9928fdebbc911e973","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"2be39946abcde5a6416fb074ef728429e246a996","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"9a756f277eb89f769dbf380f38245c270d31fdb5","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"32d6df14fdab71fe1ba304fd9a0db0411ea2e043","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"97ca58b0fb026799b99e3d552d5f69cf9a3113ad","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"47049fdadc0eaa115e813735b827e1379c0d2cf8","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_bsg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.7","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_bsg.c"]}],"references":["https://git.kernel.org/stable/c/8f01f886cc5e7bbc16cbf1a9928fdebbc911e973","https://git.kernel.org/stable/c/2be39946abcde5a6416fb074ef728429e246a996","https://git.kernel.org/stable/c/522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e","https://git.kernel.org/stable/c/9a756f277eb89f769dbf380f38245c270d31fdb5","https://git.kernel.org/stable/c/32d6df14fdab71fe1ba304fd9a0db0411ea2e043","https://git.kernel.org/stable/c/97ca58b0fb026799b99e3d552d5f69cf9a3113ad","https://git.kernel.org/stable/c/47049fdadc0eaa115e813735b827e1379c0d2cf8","https://git.kernel.org/stable/c/0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89864.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89864","state":"PUBLISHED","datePublished":"2026-09-16T10:31:35.068Z","dateUpdated":"2026-10-19T08:53:57.594Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.771Z"},"containers":{"cna":{"title":"scsi: qla2xxx: Bound i2c->length in I2C bsg handlers","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Bound i2c->length in I2C bsg handlers\n\nstruct qla_i2c_access carries a 16-bit length field alongside a fixed\n64-byte buffer:\n\n\tstruct qla_i2c_access {\n\t\tuint16_t device, offset, option, length;\n\t\tuint8_t  buffer[0x40];\n\t} __packed;\n\nqla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied\ni2c->length without any bounds check. i2c is overlaid on a 256-byte\non-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to\n65535 overruns both:\n\n  - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and\n    over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs\n    i2c->length bytes out of the 256-byte buffer.\n  - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp,\n    then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte\n    buffer inside the on-stack array.\n\nA caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the\nkernel stack. Reject requests whose length exceeds the buffer before any\ncopy or DMA transfer in both handlers."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"8f01f886cc5e7bbc16cbf1a9928fdebbc911e973","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"2be39946abcde5a6416fb074ef728429e246a996","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"9a756f277eb89f769dbf380f38245c270d31fdb5","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"32d6df14fdab71fe1ba304fd9a0db0411ea2e043","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"97ca58b0fb026799b99e3d552d5f69cf9a3113ad","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"47049fdadc0eaa115e813735b827e1379c0d2cf8","versionType":"git"},{"version":"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae","status":"affected","lessThan":"0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_bsg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.7","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_bsg.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8f01f886cc5e7bbc16cbf1a9928fdebbc911e973"},{"url":"https://git.kernel.org/stable/c/2be39946abcde5a6416fb074ef728429e246a996"},{"url":"https://git.kernel.org/stable/c/522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e"},{"url":"https://git.kernel.org/stable/c/9a756f277eb89f769dbf380f38245c270d31fdb5"},{"url":"https://git.kernel.org/stable/c/32d6df14fdab71fe1ba304fd9a0db0411ea2e043"},{"url":"https://git.kernel.org/stable/c/97ca58b0fb026799b99e3d552d5f69cf9a3113ad"},{"url":"https://git.kernel.org/stable/c/47049fdadc0eaa115e813735b827e1379c0d2cf8"},{"url":"https://git.kernel.org/stable/c/0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:53:57.594Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}