{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68229", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.376Z", "datePublished": "2026-08-10T12:00:51.935Z", "dateUpdated": "2026-08-19T16:32:01.546Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:32:01.546Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cedrus: skip invalid H.264 reference list entries\n\nCedrus consumes H.264 ref_pic_list0/ref_pic_list1 entries from the\nstateless slice control and later uses their indices to look up\ndecode->dpb[] in _cedrus_write_ref_list().\n\nRejecting such controls in cedrus_try_ctrl() would break existing\nuserspace, since stateless H.264 reference lists may legitimately carry\nout-of-range indices for missing references. Instead, guard the actual\nDPB lookup in Cedrus and skip entries whose indices do not fit the fixed\nV4L2_H264_NUM_DPB_ENTRIES array.\n\nThis keeps the fix local to the driver use site and avoids out-of-bounds\nreads from malformed or unsupported reference list entries." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached only through the local V4L2 interface on the cedrus video device node (/dev/videoN) via VIDIOC_S_EXT_CTRLS plus QBUF/STREAMON ioctls. There is no remote or network-facing path to the stateless H.264 decoder.\nAC:L - The attacker fully and deterministically controls the out-of-range value: ref_pic_list0/1[i].index is a u8 copied verbatim from the control payload with no validation, so any index in 16..255 immediately produces the out-of-bounds dpb[] access on the next decode run. No race, timing, or uncontrollable memory-layout condition is involved.\nPR:L - Only an unprivileged local account with access to the cedrus video device node is needed (typically the 'video' group, or the media/camera service on Android and embedded Allwinner devices). No capability, CAP_SYS_ADMIN, or root check exists anywhere on the path — cedrus_try_ctrl() validates only SPS chroma format and bit depth.\nUI:N - The attacking process performs the entire sequence itself — open the device, set the crafted H.264 slice-params control, queue buffers, start streaming. No victim action, file open, or media mount is required.\nS:U - The out-of-bounds read stays within the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed. This is a standard in-kernel driver memory-safety defect.\nC:H - decode->dpb[] holds 16 32-byte entries at the start of a ~560-byte control allocation, so an attacker-chosen index up to 255 reads at offset 8160 — about 7.6 KB of adjacent kernel heap beyond the object. The read flags/reference_ts values are consumed by the ACTIVE test and vb2_find_buffer() timestamp lookup, giving an attacker-steerable oracle over unrelated kernel heap contents.\nI:N - The defect is purely a read: num_ref is bounded to V4L2_H264_REF_LIST_LEN by v4l2-ctrls-core.c, so the sram_array[CEDRUS_MAX_REF_IDX] stores stay in bounds, and only a legitimately-looked-up buffer position is written to hardware SRAM. No kernel memory is modified out of bounds.\nA:H - Reading several kilobytes past the end of a slab object can walk off the slab page into an unmapped or poisoned region, and trips KASAN/hardening checks, producing a kernel oops. The trigger is trivially repeatable from an unprivileged process, so the crash can be induced at will." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/staging/media/sunxi/cedrus/cedrus_h264.c" ], "versions": [ { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "a6a109771c51920beb620f30778c29da823cc34c", "status": "affected", "versionType": "git" }, { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "7ff6f728a2433b420bb372cb0e8a4eea3f2e1a4b", "status": "affected", "versionType": "git" }, { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "1db34683b0fbbcb3bc162380c11514ea0a44e8ab", "status": "affected", "versionType": "git" }, { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "2ee8327c85b3ac7b532d2d6a1e3a295d5ad7414a", "status": "affected", "versionType": "git" }, { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "0af8945fcae742d099f59f3c725eb67235953a31", "status": "affected", "versionType": "git" }, { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "9924cb548ee7753a6473997949c3ec48092de0b0", "status": "affected", "versionType": "git" }, { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "e53112c2de88982e66c369aee2120d5efd78df30", "status": "affected", "versionType": "git" }, { "version": "e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c", "lessThan": "10358ea986c3c85516d1c8206486464f79d36e76", "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/staging/media/sunxi/cedrus/cedrus_h264.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "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": "5.10", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.1.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a6a109771c51920beb620f30778c29da823cc34c" }, { "url": "https://git.kernel.org/stable/c/7ff6f728a2433b420bb372cb0e8a4eea3f2e1a4b" }, { "url": "https://git.kernel.org/stable/c/1db34683b0fbbcb3bc162380c11514ea0a44e8ab" }, { "url": "https://git.kernel.org/stable/c/2ee8327c85b3ac7b532d2d6a1e3a295d5ad7414a" }, { "url": "https://git.kernel.org/stable/c/0af8945fcae742d099f59f3c725eb67235953a31" }, { "url": "https://git.kernel.org/stable/c/9924cb548ee7753a6473997949c3ec48092de0b0" }, { "url": "https://git.kernel.org/stable/c/e53112c2de88982e66c369aee2120d5efd78df30" }, { "url": "https://git.kernel.org/stable/c/10358ea986c3c85516d1c8206486464f79d36e76" } ], "title": "media: cedrus: skip invalid H.264 reference list entries", "x_generator": { "engine": "bippy-1.2.0" } } } }