{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50757", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T13:02:21.545Z", "datePublished": "2025-12-24T13:05:50.399Z", "dateUpdated": "2026-08-05T08:59:43.420Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:43.420Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: camss: Clean up received buffers on failed start of streaming\n\nIt is required to return the received buffers, if streaming can not be\nstarted. For instance media_pipeline_start() may fail with EPIPE, if\na link validation between entities is not passed, and in such a case\na user gets a kernel warning:\n\n WARNING: CPU: 1 PID: 520 at drivers/media/common/videobuf2/videobuf2-core.c:1592 vb2_start_streaming+0xec/0x160\n \n Call trace:\n vb2_start_streaming+0xec/0x160\n vb2_core_streamon+0x9c/0x1a0\n vb2_ioctl_streamon+0x68/0xbc\n v4l_streamon+0x30/0x3c\n __video_do_ioctl+0x184/0x3e0\n video_usercopy+0x37c/0x7b0\n video_ioctl2+0x24/0x40\n v4l2_ioctl+0x4c/0x70\n\nThe fix is to correct the error path in video_start_streaming() of camss." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reached only through local V4L2 ioctls (VIDIOC_REQBUFS/QBUF/STREAMON) on the Qualcomm CAMSS /dev/video node; there is no network or adjacent-protocol entry point.\nAC:L - The attacker fully controls the failure condition by configuring an invalid media pipeline (e.g., disabled links or link validation failure with EPIPE) and then calling STREAMON; the missing flush is deterministic with no race beyond attacker control.\nPR:L - video_open() and the STREAMON path perform no capability checks; only permission to open the camera video device (video group, seat ACL, or Android CAMERA-permission context) is required, which is basic unprivileged local access.\nUI:N - The attacker issues the open/queue/streamon/reqbufs sequence from their own process; no victim interaction is required.\nS:U - Impact is confined to kernel heap and CAMSS driver state within the same OS security authority; the bug does not cross a VM, IOMMU, or sandbox boundary by itself.\nC:H - Failing to flush leaves buffers on output->pending_bufs after vb2 force-reclaims them; a later REQBUFS(0)/release frees those objects while the driver still holds list pointers, creating a use-after-free that can disclose reclaimed heap contents.\nI:H - The stale pending_bufs linkage enables list corruption (INIT_LIST_HEAD/list_del on still-linked or freed nodes) and heap UAF write primitives when the queue is reused or cancelled, which is treated as high integrity impact under conservative memory-corruption scoring.\nA:H - The bug immediately triggers WARN_ON in vb2_start_streaming, and the resulting UAF/list corruption can oops or panic the kernel, giving high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/platform/qcom/camss/camss-video.c" ], "versions": [ { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "75954cde8a5ca84003b24b6bf83197240935bd74", "status": "affected", "versionType": "git" }, { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "04c734c716a97f1493b1edac41316aaed1d2a9d9", "status": "affected", "versionType": "git" }, { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "fe443b3fe36cd23d4f5dc6d825d34322e7c89f0c", "status": "affected", "versionType": "git" }, { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "3d5cab726e3b370fea1b6e67183f0e13c409ce5c", "status": "affected", "versionType": "git" }, { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "d1c44928bb3ca0ec88e7ad5937a2a26a259aede6", "status": "affected", "versionType": "git" }, { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "f05326a440dc31b91b688b2f3f15b7347894a50b", "status": "affected", "versionType": "git" }, { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "24df4fa3e795fb4b15fd4d3c036596e0978d265a", "status": "affected", "versionType": "git" }, { "version": "0ac2586c410fe00d58dd09bf270a22f25d5287b8", "lessThan": "c8f3582345e6a69da65ab588f7c4c2d1685b0e80", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/platform/qcom/camss/camss-video.c" ], "versions": [ { "version": "4.14", "status": "affected" }, { "version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.303", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.270", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.229", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.86", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "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": "4.14", "versionEndExcluding": "4.14.303" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "4.19.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.4.229" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.10.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.0.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/75954cde8a5ca84003b24b6bf83197240935bd74" }, { "url": "https://git.kernel.org/stable/c/04c734c716a97f1493b1edac41316aaed1d2a9d9" }, { "url": "https://git.kernel.org/stable/c/fe443b3fe36cd23d4f5dc6d825d34322e7c89f0c" }, { "url": "https://git.kernel.org/stable/c/3d5cab726e3b370fea1b6e67183f0e13c409ce5c" }, { "url": "https://git.kernel.org/stable/c/d1c44928bb3ca0ec88e7ad5937a2a26a259aede6" }, { "url": "https://git.kernel.org/stable/c/f05326a440dc31b91b688b2f3f15b7347894a50b" }, { "url": "https://git.kernel.org/stable/c/24df4fa3e795fb4b15fd4d3c036596e0978d265a" }, { "url": "https://git.kernel.org/stable/c/c8f3582345e6a69da65ab588f7c4c2d1685b0e80" } ], "title": "media: camss: Clean up received buffers on failed start of streaming", "x_generator": { "engine": "bippy-1.2.0" } } } }