{"id":"CVE-2022-50452","state":"PUBLISHED","title":"net: sched: cake: fix null pointer access issue when cake_init() fails","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: cake: fix null pointer access issue when cake_init() fails\n\nWhen the default qdisc is cake, if the qdisc of dev_queue fails to be\ninited during mqprio_init(), cake_reset() is invoked to clear\nresources. In this case, the tins is NULL, and it will cause gpf issue.\n\nThe process is as follows:\nqdisc_create_dflt()\n\tcake_init()\n\t\tq->tins = kvcalloc(...)        --->failed, q->tins is NULL\n\t...\n\tqdisc_put()\n\t\t...\n\t\tcake_reset()\n\t\t\t...\n\t\t\tcake_dequeue_one()\n\t\t\t\tb = &q->tins[...]   --->q->tins is NULL\n\nThe following is the Call Trace information:\ngeneral protection fault, probably for non-canonical address\n0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nRIP: 0010:cake_dequeue_one+0xc9/0x3c0\nCall Trace:\n<TASK>\ncake_reset+0xb1/0x140\nqdisc_reset+0xed/0x6f0\nqdisc_destroy+0x82/0x4c0\nqdisc_put+0x9e/0xb0\nqdisc_create_dflt+0x2c3/0x4a0\nmqprio_init+0xa71/0x1760\nqdisc_create+0x3eb/0x1000\ntc_modify_qdisc+0x408/0x1720\nrtnetlink_rcv_msg+0x38e/0xac0\nnetlink_rcv_skb+0x12d/0x3a0\nnetlink_unicast+0x4a2/0x740\nnetlink_sendmsg+0x826/0xcc0\nsock_sendmsg+0xc5/0x100\n____sys_sendmsg+0x583/0x690\n___sys_sendmsg+0xe8/0x160\n__sys_sendmsg+0xbf/0x160\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f89e5122d04\n</TASK>","publishedAt":"2025-10-01T11:45:25.394Z","updatedAt":"2026-05-11T19:19:44.873Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"86aa1390898146f1de277bb6d2a8ed7fc7a43f12","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"bc8301ea7e7f1bb9d2ba2fcdf7b5ec2f0792b47e","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"ae48bee2830bf216800e1447baca39541e27a12e","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"154f4c06d9dbec1a14e91286c70b6305810302e0","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"1dc0a019550fd38ec6cab2d73c90df2bd659c96b","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"51f9a8921ceacd7bf0d3f47fa867a64988ba1dcb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_cake.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"4.19.264","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.221","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.152","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.76","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.6","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_cake.c"]}],"references":["https://git.kernel.org/stable/c/86aa1390898146f1de277bb6d2a8ed7fc7a43f12","https://git.kernel.org/stable/c/bc8301ea7e7f1bb9d2ba2fcdf7b5ec2f0792b47e","https://git.kernel.org/stable/c/ae48bee2830bf216800e1447baca39541e27a12e","https://git.kernel.org/stable/c/154f4c06d9dbec1a14e91286c70b6305810302e0","https://git.kernel.org/stable/c/1dc0a019550fd38ec6cab2d73c90df2bd659c96b","https://git.kernel.org/stable/c/51f9a8921ceacd7bf0d3f47fa867a64988ba1dcb"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50452.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50452","state":"PUBLISHED","datePublished":"2025-10-01T11:45:25.394Z","dateUpdated":"2026-05-11T19:19:44.873Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-17T14:53:07.011Z"},"containers":{"cna":{"title":"net: sched: cake: fix null pointer access issue when cake_init() fails","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: cake: fix null pointer access issue when cake_init() fails\n\nWhen the default qdisc is cake, if the qdisc of dev_queue fails to be\ninited during mqprio_init(), cake_reset() is invoked to clear\nresources. In this case, the tins is NULL, and it will cause gpf issue.\n\nThe process is as follows:\nqdisc_create_dflt()\n\tcake_init()\n\t\tq->tins = kvcalloc(...)        --->failed, q->tins is NULL\n\t...\n\tqdisc_put()\n\t\t...\n\t\tcake_reset()\n\t\t\t...\n\t\t\tcake_dequeue_one()\n\t\t\t\tb = &q->tins[...]   --->q->tins is NULL\n\nThe following is the Call Trace information:\ngeneral protection fault, probably for non-canonical address\n0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nRIP: 0010:cake_dequeue_one+0xc9/0x3c0\nCall Trace:\n<TASK>\ncake_reset+0xb1/0x140\nqdisc_reset+0xed/0x6f0\nqdisc_destroy+0x82/0x4c0\nqdisc_put+0x9e/0xb0\nqdisc_create_dflt+0x2c3/0x4a0\nmqprio_init+0xa71/0x1760\nqdisc_create+0x3eb/0x1000\ntc_modify_qdisc+0x408/0x1720\nrtnetlink_rcv_msg+0x38e/0xac0\nnetlink_rcv_skb+0x12d/0x3a0\nnetlink_unicast+0x4a2/0x740\nnetlink_sendmsg+0x826/0xcc0\nsock_sendmsg+0xc5/0x100\n____sys_sendmsg+0x583/0x690\n___sys_sendmsg+0xe8/0x160\n__sys_sendmsg+0xbf/0x160\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f89e5122d04\n</TASK>"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"86aa1390898146f1de277bb6d2a8ed7fc7a43f12","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"bc8301ea7e7f1bb9d2ba2fcdf7b5ec2f0792b47e","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"ae48bee2830bf216800e1447baca39541e27a12e","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"154f4c06d9dbec1a14e91286c70b6305810302e0","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"1dc0a019550fd38ec6cab2d73c90df2bd659c96b","versionType":"git"},{"version":"046f6fd5daefac7f5abdafb436b30f63bc7c602b","status":"affected","lessThan":"51f9a8921ceacd7bf0d3f47fa867a64988ba1dcb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_cake.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"4.19.264","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.221","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.152","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.76","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.6","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_cake.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/86aa1390898146f1de277bb6d2a8ed7fc7a43f12"},{"url":"https://git.kernel.org/stable/c/bc8301ea7e7f1bb9d2ba2fcdf7b5ec2f0792b47e"},{"url":"https://git.kernel.org/stable/c/ae48bee2830bf216800e1447baca39541e27a12e"},{"url":"https://git.kernel.org/stable/c/154f4c06d9dbec1a14e91286c70b6305810302e0"},{"url":"https://git.kernel.org/stable/c/1dc0a019550fd38ec6cab2d73c90df2bd659c96b"},{"url":"https://git.kernel.org/stable/c/51f9a8921ceacd7bf0d3f47fa867a64988ba1dcb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:19:44.873Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"4.19.264"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.4.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.10.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.15.76"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.0.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}