{"id":"CVE-2022-50288","state":"PUBLISHED","title":"qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nqlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure\n\nadapter->dcb would get silently freed inside qlcnic_dcb_enable() in\ncase qlcnic_dcb_attach() would return an error, which always happens\nunder OOM conditions. This would lead to use-after-free because both\nof the existing callers invoke qlcnic_dcb_get_info() on the obtained\npointer, which is potentially freed at that point.\n\nPropagate errors from qlcnic_dcb_enable(), and instead free the dcb\npointer at callsite using qlcnic_dcb_free(). This also removes the now\nunused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around\nkfree() also causing memory leaks for partially initialized dcb.\n\nFound by Linux Verification Center (linuxtesting.org) with the SVACE\nstatic analysis tool.","publishedAt":"2025-09-15T14:21:24.427Z","updatedAt":"2026-05-11T19:16:25.955Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"36999236f0b12d5de21a6f40e93b570727b9ceb2","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"d12a7510293d3370b234b0b7c5eda33e58786768","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"8f97eeb02a553cdc78c83a0596448a370e1518c4","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"513787ff9a331b461115e8a145a983d650a84fcb","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"95df720e64a6409d8152827a776c43f615e3321a","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"8df1dc04ce0e4c03b51a756749c250a9cb17d707","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"a2a694e6edbdb3efb34e1613a31fdcf6cf444a55","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"13a7c8964afcd8ca43c0b6001ebb0127baa95362","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c","drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.h","drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.14","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.87","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.19","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.5","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c","drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.h","drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c"]}],"references":["https://git.kernel.org/stable/c/36999236f0b12d5de21a6f40e93b570727b9ceb2","https://git.kernel.org/stable/c/d12a7510293d3370b234b0b7c5eda33e58786768","https://git.kernel.org/stable/c/8f97eeb02a553cdc78c83a0596448a370e1518c4","https://git.kernel.org/stable/c/513787ff9a331b461115e8a145a983d650a84fcb","https://git.kernel.org/stable/c/95df720e64a6409d8152827a776c43f615e3321a","https://git.kernel.org/stable/c/8df1dc04ce0e4c03b51a756749c250a9cb17d707","https://git.kernel.org/stable/c/a2a694e6edbdb3efb34e1613a31fdcf6cf444a55","https://git.kernel.org/stable/c/13a7c8964afcd8ca43c0b6001ebb0127baa95362"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50288.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50288","state":"PUBLISHED","datePublished":"2025-09-15T14:21:24.427Z","dateUpdated":"2026-05-11T19:16:25.955Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-15T13:58:00.977Z"},"containers":{"cna":{"title":"qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nqlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure\n\nadapter->dcb would get silently freed inside qlcnic_dcb_enable() in\ncase qlcnic_dcb_attach() would return an error, which always happens\nunder OOM conditions. This would lead to use-after-free because both\nof the existing callers invoke qlcnic_dcb_get_info() on the obtained\npointer, which is potentially freed at that point.\n\nPropagate errors from qlcnic_dcb_enable(), and instead free the dcb\npointer at callsite using qlcnic_dcb_free(). This also removes the now\nunused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around\nkfree() also causing memory leaks for partially initialized dcb.\n\nFound by Linux Verification Center (linuxtesting.org) with the SVACE\nstatic analysis tool."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"36999236f0b12d5de21a6f40e93b570727b9ceb2","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"d12a7510293d3370b234b0b7c5eda33e58786768","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"8f97eeb02a553cdc78c83a0596448a370e1518c4","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"513787ff9a331b461115e8a145a983d650a84fcb","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"95df720e64a6409d8152827a776c43f615e3321a","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"8df1dc04ce0e4c03b51a756749c250a9cb17d707","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"a2a694e6edbdb3efb34e1613a31fdcf6cf444a55","versionType":"git"},{"version":"3c44bba1d270cb1620b4fe76786d0968118cb86b","status":"affected","lessThan":"13a7c8964afcd8ca43c0b6001ebb0127baa95362","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c","drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.h","drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.14","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.87","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.19","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.5","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c","drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.h","drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/36999236f0b12d5de21a6f40e93b570727b9ceb2"},{"url":"https://git.kernel.org/stable/c/d12a7510293d3370b234b0b7c5eda33e58786768"},{"url":"https://git.kernel.org/stable/c/8f97eeb02a553cdc78c83a0596448a370e1518c4"},{"url":"https://git.kernel.org/stable/c/513787ff9a331b461115e8a145a983d650a84fcb"},{"url":"https://git.kernel.org/stable/c/95df720e64a6409d8152827a776c43f615e3321a"},{"url":"https://git.kernel.org/stable/c/8df1dc04ce0e4c03b51a756749c250a9cb17d707"},{"url":"https://git.kernel.org/stable/c/a2a694e6edbdb3efb34e1613a31fdcf6cf444a55"},{"url":"https://git.kernel.org/stable/c/13a7c8964afcd8ca43c0b6001ebb0127baa95362"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:16:25.955Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"4.14.303"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"4.19.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"5.4.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"5.10.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"5.15.87"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.0.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}