{"id":"CVE-2024-43862","state":"PUBLISHED","title":"net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex\n\nThe carrier_lock spinlock protects the carrier detection. While it is\nheld, framer_get_status() is called which in turn takes a mutex.\nThis is not correct and can lead to a deadlock.\n\nA run with PROVE_LOCKING enabled detected the issue:\n  [ BUG: Invalid wait context ]\n  ...\n  c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78\n  other info that might help us debug this:\n  context-{4:4}\n  2 locks held by ifconfig/146:\n  #0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664\n  #1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98\n\nAvoid the spinlock usage and convert carrier_lock to a mutex.","publishedAt":"2024-08-20T23:45:26.643Z","updatedAt":"2026-05-11T20:31:15.637Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"54762918ca856028d33d1d56d017a4d7706c6196","status":"affected","lessThan":"f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9","versionType":"git"},{"version":"54762918ca856028d33d1d56d017a4d7706c6196","status":"affected","lessThan":"c4d6a347ba7babdf9d90a0eb24048c266cae0532","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wan/fsl_qmc_hdlc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.10.4","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wan/fsl_qmc_hdlc.c"]}],"references":["https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9","https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:47.831Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/43xxx/CVE-2024-43862.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-43862","state":"PUBLISHED","datePublished":"2024-08-20T23:45:26.643Z","dateUpdated":"2026-05-11T20:31:15.637Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-17T09:11:59.279Z"},"containers":{"cna":{"title":"net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex\n\nThe carrier_lock spinlock protects the carrier detection. While it is\nheld, framer_get_status() is called which in turn takes a mutex.\nThis is not correct and can lead to a deadlock.\n\nA run with PROVE_LOCKING enabled detected the issue:\n  [ BUG: Invalid wait context ]\n  ...\n  c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78\n  other info that might help us debug this:\n  context-{4:4}\n  2 locks held by ifconfig/146:\n  #0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664\n  #1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98\n\nAvoid the spinlock usage and convert carrier_lock to a mutex."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"54762918ca856028d33d1d56d017a4d7706c6196","status":"affected","lessThan":"f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9","versionType":"git"},{"version":"54762918ca856028d33d1d56d017a4d7706c6196","status":"affected","lessThan":"c4d6a347ba7babdf9d90a0eb24048c266cae0532","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wan/fsl_qmc_hdlc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.10.4","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wan/fsl_qmc_hdlc.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9"},{"url":"https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:31:15.637Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.10.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.11"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-43862","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:06:49.152851Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:33:19.773Z"}}]}}}