{"id":"CVE-2026-23058","state":"PUBLISHED","title":"can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak\n\nFix similar memory leak as in commit 7352e1d5932a (\"can: gs_usb:\ngs_usb_receive_bulk_callback(): fix URB memory leak\").\n\nIn ems_usb_open(), the URBs for USB-in transfers are allocated, added to\nthe dev->rx_submitted anchor and submitted. In the complete callback\nems_usb_read_bulk_callback(), the URBs are processed and resubmitted. In\nems_usb_close() the URBs are freed by calling\nusb_kill_anchored_urbs(&dev->rx_submitted).\n\nHowever, this does not take into account that the USB framework unanchors\nthe URB before the complete function is called. This means that once an\nin-URB has been completed, it is no longer anchored and is ultimately not\nreleased in ems_usb_close().\n\nFix the memory leak by anchoring the URB in the\nems_usb_read_bulk_callback() to the dev->rx_submitted anchor.","publishedAt":"2026-02-04T16:07:41.337Z","updatedAt":"2026-05-11T21:59:11.271Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"e2c71030dc464d437110bcfb367c493fd402bddb","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"f48eabd15194b216030b32445f44230df95f5fe0","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"61e6d3674c3d1da1475dc207b3e75c55d678d18e","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"68c62b3e53901846b5f68c5a8bade72a5d9c0b87","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"0ce73a0eb5a27070957b67fd74059b6da89cc516","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/ems_usb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.32","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.32","versionType":"semver"},{"version":"5.10.249","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.199","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.162","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.122","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.68","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/ems_usb.c"]}],"references":["https://git.kernel.org/stable/c/e2c71030dc464d437110bcfb367c493fd402bddb","https://git.kernel.org/stable/c/f48eabd15194b216030b32445f44230df95f5fe0","https://git.kernel.org/stable/c/61e6d3674c3d1da1475dc207b3e75c55d678d18e","https://git.kernel.org/stable/c/e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8","https://git.kernel.org/stable/c/46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a","https://git.kernel.org/stable/c/68c62b3e53901846b5f68c5a8bade72a5d9c0b87","https://git.kernel.org/stable/c/0ce73a0eb5a27070957b67fd74059b6da89cc516"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23058.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23058","state":"PUBLISHED","datePublished":"2026-02-04T16:07:41.337Z","dateUpdated":"2026-05-11T21:59:11.271Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.952Z"},"containers":{"cna":{"title":"can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak\n\nFix similar memory leak as in commit 7352e1d5932a (\"can: gs_usb:\ngs_usb_receive_bulk_callback(): fix URB memory leak\").\n\nIn ems_usb_open(), the URBs for USB-in transfers are allocated, added to\nthe dev->rx_submitted anchor and submitted. In the complete callback\nems_usb_read_bulk_callback(), the URBs are processed and resubmitted. In\nems_usb_close() the URBs are freed by calling\nusb_kill_anchored_urbs(&dev->rx_submitted).\n\nHowever, this does not take into account that the USB framework unanchors\nthe URB before the complete function is called. This means that once an\nin-URB has been completed, it is no longer anchored and is ultimately not\nreleased in ems_usb_close().\n\nFix the memory leak by anchoring the URB in the\nems_usb_read_bulk_callback() to the dev->rx_submitted anchor."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"e2c71030dc464d437110bcfb367c493fd402bddb","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"f48eabd15194b216030b32445f44230df95f5fe0","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"61e6d3674c3d1da1475dc207b3e75c55d678d18e","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"68c62b3e53901846b5f68c5a8bade72a5d9c0b87","versionType":"git"},{"version":"702171adeed3607ee9603ec30ce081411e36ae42","status":"affected","lessThan":"0ce73a0eb5a27070957b67fd74059b6da89cc516","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/ems_usb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.32","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.32","versionType":"semver"},{"version":"5.10.249","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.199","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.162","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.122","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.68","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/ems_usb.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e2c71030dc464d437110bcfb367c493fd402bddb"},{"url":"https://git.kernel.org/stable/c/f48eabd15194b216030b32445f44230df95f5fe0"},{"url":"https://git.kernel.org/stable/c/61e6d3674c3d1da1475dc207b3e75c55d678d18e"},{"url":"https://git.kernel.org/stable/c/e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8"},{"url":"https://git.kernel.org/stable/c/46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a"},{"url":"https://git.kernel.org/stable/c/68c62b3e53901846b5f68c5a8bade72a5d9c0b87"},{"url":"https://git.kernel.org/stable/c/0ce73a0eb5a27070957b67fd74059b6da89cc516"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:59:11.271Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"5.10.249"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"5.15.199"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.1.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.6.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.12.68"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}