{"id":"CVE-2026-43007","state":"PUBLISHED","title":"accel/qaic: Handle DBC deactivation if the owner went away","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: Handle DBC deactivation if the owner went away\n\nWhen a DBC is released, the device sends a QAIC_TRANS_DEACTIVATE_FROM_DEV\ntransaction to the host over the QAIC_CONTROL MHI channel. QAIC handles\nthis by calling decode_deactivate() to release the resources allocated for\nthat DBC. Since that handling is done in the qaic_manage_ioctl() context,\nif the user goes away before receiving and handling the deactivation, the\nhost will be out-of-sync with the DBCs available for use, and the DBC\nresources will not be freed unless the device is removed. If another user\nloads and requests to activate a network, then the device assigns the same\nDBC to that network, QAIC will \"indefinitely\" wait for dbc->in_use = false,\nleading the user process to hang.\n\nAs a solution to this, handle QAIC_TRANS_DEACTIVATE_FROM_DEV transactions\nthat are received after the user has gone away.","publishedAt":"2026-05-01T14:15:14.914Z","updatedAt":"2026-05-11T22:15:54.042Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"2dd67966f39a2abf8ccb4865031c722e40e01b7f","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"08021f2d4a557d6491e3bcc288e96425f50aa3cf","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"f403094d9075d7c565a3d81002b781c325cb3c07","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"ee0180e77e6c8482644569632065411de844c515","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"2feec5ae5df785658924ab6bd91280dc3926507c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/qaic/qaic_control.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/qaic/qaic_control.c"]}],"references":["https://git.kernel.org/stable/c/2dd67966f39a2abf8ccb4865031c722e40e01b7f","https://git.kernel.org/stable/c/08021f2d4a557d6491e3bcc288e96425f50aa3cf","https://git.kernel.org/stable/c/f403094d9075d7c565a3d81002b781c325cb3c07","https://git.kernel.org/stable/c/ee0180e77e6c8482644569632065411de844c515","https://git.kernel.org/stable/c/2feec5ae5df785658924ab6bd91280dc3926507c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43007.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43007","state":"PUBLISHED","datePublished":"2026-05-01T14:15:14.914Z","dateUpdated":"2026-05-11T22:15:54.042Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.974Z"},"containers":{"cna":{"title":"accel/qaic: Handle DBC deactivation if the owner went away","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: Handle DBC deactivation if the owner went away\n\nWhen a DBC is released, the device sends a QAIC_TRANS_DEACTIVATE_FROM_DEV\ntransaction to the host over the QAIC_CONTROL MHI channel. QAIC handles\nthis by calling decode_deactivate() to release the resources allocated for\nthat DBC. Since that handling is done in the qaic_manage_ioctl() context,\nif the user goes away before receiving and handling the deactivation, the\nhost will be out-of-sync with the DBCs available for use, and the DBC\nresources will not be freed unless the device is removed. If another user\nloads and requests to activate a network, then the device assigns the same\nDBC to that network, QAIC will \"indefinitely\" wait for dbc->in_use = false,\nleading the user process to hang.\n\nAs a solution to this, handle QAIC_TRANS_DEACTIVATE_FROM_DEV transactions\nthat are received after the user has gone away."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"2dd67966f39a2abf8ccb4865031c722e40e01b7f","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"08021f2d4a557d6491e3bcc288e96425f50aa3cf","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"f403094d9075d7c565a3d81002b781c325cb3c07","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"ee0180e77e6c8482644569632065411de844c515","versionType":"git"},{"version":"129776ac2e38231fa9c02ce20e116c99de291666","status":"affected","lessThan":"2feec5ae5df785658924ab6bd91280dc3926507c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/qaic/qaic_control.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/qaic/qaic_control.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2dd67966f39a2abf8ccb4865031c722e40e01b7f"},{"url":"https://git.kernel.org/stable/c/08021f2d4a557d6491e3bcc288e96425f50aa3cf"},{"url":"https://git.kernel.org/stable/c/f403094d9075d7c565a3d81002b781c325cb3c07"},{"url":"https://git.kernel.org/stable/c/ee0180e77e6c8482644569632065411de844c515"},{"url":"https://git.kernel.org/stable/c/2feec5ae5df785658924ab6bd91280dc3926507c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:15:54.042Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}