{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80628", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.775Z", "datePublished": "2026-08-28T06:48:45.377Z", "dateUpdated": "2026-08-28T06:48:45.377Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-28T06:48:45.377Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: oss: Serialize readq reset state with q->lock\n\nsnd_seq_oss_readq_clear() resets qlen, head, and tail without\nq->lock even though the normal reader and producer paths serialize the\nsame ring state under that spinlock. A reset can therefore race\nsnd_seq_oss_readq_free() or snd_seq_oss_readq_put_event() and leave\nstale records in the queue, drop freshly queued ones, or report the\nwrong readiness after wakeup. KCSAN reports a data race between\nsnd_seq_oss_readq_clear() and snd_seq_oss_readq_free().\n\nTake q->lock while clearing the ring and resetting input_time. Factor\nthe enqueue logic into a caller-locked helper so\nsnd_seq_oss_readq_put_timestamp() updates its suppression state under\nthe same lock instead of racing the reset path.\n\nThe buggy scenario involves two paths, with each column showing the\norder within that path:\n\nreset path: locked readq updater:\n1. snd_seq_oss_reset() or 1. A reader or callback producer\n release reaches takes q->lock on the same queue.\n snd_seq_oss_readq_clear().\n2. snd_seq_oss_readq_clear() 2. The updater tests or modifies\n resets qlen, head, tail, qlen, head, and tail.\n and input_time.\n3. snd_seq_oss_readq_clear() 3. The updater completes its\n wakes sleepers on read-modify-write sequence.\n q->midi_sleep.\n4. Without q->lock, the reset 4. The resulting ring state drives\n can overlap the locked later reads and readiness.\n update.\n\nKCSAN reports:\n\nBUG: KCSAN: data-race in snd_seq_oss_readq_clear /\nsnd_seq_oss_readq_free\n\nwrite to 0xffff8881069fe608 of 4 bytes by task 120516 on cpu 0:\n snd_seq_oss_readq_free+0x6c/0x80\n snd_seq_oss_read+0xcb/0x250\n odev_read+0x38/0x60\n vfs_read+0xff/0x600\n ksys_read+0xb4/0x140\n __x64_sys_read+0x46/0x60\n do_syscall_64+0xbb/0x2f0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nread to 0xffff8881069fe608 of 4 bytes by task 120517 on cpu 1:\n snd_seq_oss_readq_clear+0x1f/0x90\n snd_seq_oss_reset+0xa7/0xf0\n snd_seq_oss_ioctl+0x6f6/0x7e0\n odev_ioctl+0x56/0xc0\n __x64_sys_ioctl+0xd1/0x120\n do_syscall_64+0xbb/0x2f0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalue changed: 0x00000001 -> 0x00000000"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/core/seq/oss/seq_oss_readq.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "287d506d4e0865918cec82bb1361f283a08c979b", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "43e10709b1ba288bcbabb9b9cb6e518b2a5d8506", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "49ce92d207820f588b0406add82f053decfbe5d9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/core/seq/oss/seq_oss_readq.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "2.6.12", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/287d506d4e0865918cec82bb1361f283a08c979b"}, {"url": "https://git.kernel.org/stable/c/43e10709b1ba288bcbabb9b9cb6e518b2a5d8506"}, {"url": "https://git.kernel.org/stable/c/49ce92d207820f588b0406add82f053decfbe5d9"}], "title": "ALSA: seq: oss: Serialize readq reset state with q->lock", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/core/seq/oss/seq_oss_readq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "287d506d4e0865918cec82bb1361f283a08c979b", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "43e10709b1ba288bcbabb9b9cb6e518b2a5d8506", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "49ce92d207820f588b0406add82f053decfbe5d9", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["sound/core/seq/oss/seq_oss_readq.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"lessThan": "2.6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: oss: Serialize readq reset state with q->lock\n\nsnd_seq_oss_readq_clear() resets qlen, head, and tail without\nq->lock even though the normal reader and producer paths serialize the\nsame ring state under that spinlock. A reset can therefore race\nsnd_seq_oss_readq_free() or snd_seq_oss_readq_put_event() and leave\nstale records in the queue, drop freshly queued ones, or report the\nwrong readiness after wakeup. KCSAN reports a data race between\nsnd_seq_oss_readq_clear() and snd_seq_oss_readq_free().\n\nTake q->lock while clearing the ring and resetting input_time. Factor\nthe enqueue logic into a caller-locked helper so\nsnd_seq_oss_readq_put_timestamp() updates its suppression state under\nthe same lock instead of racing the reset path.\n\nThe buggy scenario involves two paths, with each column showing the\norder within that path:\n\nreset path: locked readq updater:\n1. snd_seq_oss_reset() or 1. A reader or callback producer\n release reaches takes q->lock on the same queue.\n snd_seq_oss_readq_clear().\n2. snd_seq_oss_readq_clear() 2. The updater tests or modifies\n resets qlen, head, tail, qlen, head, and tail.\n and input_time.\n3. snd_seq_oss_readq_clear() 3. The updater completes its\n wakes sleepers on read-modify-write sequence.\n q->midi_sleep.\n4. Without q->lock, the reset 4. The resulting ring state drives\n can overlap the locked later reads and readiness.\n update.\n\nKCSAN reports:\n\nBUG: KCSAN: data-race in snd_seq_oss_readq_clear /\nsnd_seq_oss_readq_free\n\nwrite to 0xffff8881069fe608 of 4 bytes by task 120516 on cpu 0:\n snd_seq_oss_readq_free+0x6c/0x80\n snd_seq_oss_read+0xcb/0x250\n odev_read+0x38/0x60\n vfs_read+0xff/0x600\n ksys_read+0xb4/0x140\n __x64_sys_read+0x46/0x60\n do_syscall_64+0xbb/0x2f0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nread to 0xffff8881069fe608 of 4 bytes by task 120517 on cpu 1:\n snd_seq_oss_readq_clear+0x1f/0x90\n snd_seq_oss_reset+0xa7/0xf0\n snd_seq_oss_ioctl+0x6f6/0x7e0\n odev_ioctl+0x56/0xc0\n __x64_sys_ioctl+0xd1/0x120\n do_syscall_64+0xbb/0x2f0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalue changed: 0x00000001 -> 0x00000000"}], "id": "CVE-2026-80628", "lastModified": "2026-08-28T08:16:47.007", "metrics": {}, "published": "2026-08-28T08:16:47.007", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/287d506d4e0865918cec82bb1361f283a08c979b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/43e10709b1ba288bcbabb9b9cb6e518b2a5d8506"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/49ce92d207820f588b0406add82f053decfbe5d9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,287d506d4e0865918cec82bb1361f283a08c979b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,43e10709b1ba288bcbabb9b9cb6e518b2a5d8506)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,49ce92d207820f588b0406add82f053decfbe5d9)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-28T10:30:17.561617+00:00", "updated": "2026-08-28T14:15:04.392911+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}