{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50356","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-09-17T14:53:06.994Z","datePublished":"2025-09-17T14:56:09.165Z","dateUpdated":"2026-05-11T19:17:57.127Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:17:57.127Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: sfb: fix null pointer access issue when sfb_init() fails\n\nWhen the default qdisc is sfb, if the qdisc of dev_queue fails to be\ninited during mqprio_init(), sfb_reset() is invoked to clear resources.\nIn this case, the q->qdisc is NULL, and it will cause gpf issue.\n\nThe process is as follows:\nqdisc_create_dflt()\n\tsfb_init()\n\t\ttcf_block_get()          --->failed, q->qdisc is NULL\n\t...\n\tqdisc_put()\n\t\t...\n\t\tsfb_reset()\n\t\t\tqdisc_reset(q->qdisc)    --->q->qdisc is NULL\n\t\t\t\tops = qdisc->ops\n\nThe following is the Call Trace information:\ngeneral protection fault, probably for non-canonical address\n0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\nRIP: 0010:qdisc_reset+0x2b/0x6f0\nCall Trace:\n<TASK>\nsfb_reset+0x37/0xd0\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: 0033:0x7f2164122d04\n</TASK>"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_sfb.c"],"versions":[{"version":"e13e02a3c68d899169c78d9a18689bd73491d59a","lessThan":"ded86c4191a3c17f8200d17a7d8a6f63b74554ae","status":"affected","versionType":"git"},{"version":"e13e02a3c68d899169c78d9a18689bd73491d59a","lessThan":"c2e1e59d59fafe297779ceae1fe0e6fbebc3e745","status":"affected","versionType":"git"},{"version":"e13e02a3c68d899169c78d9a18689bd73491d59a","lessThan":"723399af2795fb95687a531c9480464b5f489333","status":"affected","versionType":"git"},{"version":"e13e02a3c68d899169c78d9a18689bd73491d59a","lessThan":"2a3fc78210b9f0e85372a2435368962009f480fc","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_sfb.c"],"versions":[{"version":"2.6.39","status":"affected"},{"version":"0","lessThan":"2.6.39","status":"unaffected","versionType":"semver"},{"version":"5.10.152","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.76","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.0.6","lessThanOrEqual":"6.0.*","status":"unaffected","versionType":"semver"},{"version":"6.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"5.10.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"5.15.76"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.0.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae"},{"url":"https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745"},{"url":"https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333"},{"url":"https://git.kernel.org/stable/c/2a3fc78210b9f0e85372a2435368962009f480fc"}],"title":"net: sched: sfb: fix null pointer access issue when sfb_init() fails","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-50356","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T18:32:08.065447Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-14T18:33:01.117Z"}}]}}