214 lines
11 KiB
JSON
214 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-80522",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-26T14:34:25.763Z",
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"datePublished": "2026-08-26T14:37:03.180Z",
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"dateUpdated": "2026-10-16T19:26:24.520Z"
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},
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-27T05:01:18.823Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req()\n\nPerform rctx->cryptlen calculation in tegra_gcm_do_one_req() the same way\nit is done in tegra_ccm_crypt_init(). The current formulae may lead to a\ncrash if a caller does not call tegra_gcm_setauthsize() and so ctx->authsize\nremains zero. Then a decrypt operation with incorrect rctx->cryptlen will\nlead to a write beyound rctx->dst_sg buffer.\n\nAs a follow-up cleanup delete struct tegra_aead_ctx->authsize field since\nit appears to be completely unused. Also simplify tegra_ccm_setauthsize()\nand tegra_gcm_setauthsize() functions respectively."
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}
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],
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The flaw is in the Tegra Security Engine gcm(aes) driver reached via the kernel crypto API (AF_ALG socket syscalls); major network consumers call setauthsize and are not affected, and the driver only exists on Tegra234 platforms with TEGRA_HOST1X.\nAC:L - On affected Tegra systems with tegra-se loaded, an attacker reliably triggers the bug by issuing a GCM decrypt through AF_ALG without calling ALG_SET_AEAD_AUTHSIZE, relying on the default 16-byte tag while ctx->authsize remains zero.\nPR:L - Triggering tegra GCM decrypt via AF_ALG requires only an unprivileged local user able to open AF_ALG sockets and bind to gcm(aes); no CAP_SYS_ADMIN, real root, or container-escaping capabilities are needed on standard configurations.\nUI:N - Exploitation requires no victim interaction such as mounting filesystems or opening files; the attacker directly submits crafted decrypt requests through the local crypto interface.\nS:U - Impact is kernel heap/memory corruption and potential privilege escalation within the same kernel security domain; it does not cross VM, container, or IOMMU boundaries.\nC:H - The out-of-bounds write corrupts memory adjacent to the destination scatterlist buffer; such heap corruption can expose kernel pointers or other sensitive data and is rated High per memory-corruption guidance.\nI:H - Decrypt uses an inflated cryptlen so scatterwalk_map_and_copy writes up to 16 bytes beyond the caller-allocated dst_sg buffer with no bounds checking, constituting an exploitable out-of-bounds write primitive.\nA:H - Writing past the destination scatterlist can corrupt adjacent kernel structures and cause kernel oops or panic; the fix commit explicitly describes this as a crash-causing out-of-bounds write condition."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/crypto/tegra/tegra-se-aes.c"
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],
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"drivers/crypto/tegra/tegra-se-aes.c"
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],
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"versions": [
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"version": "0",
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"version": "6.12.105",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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},
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{
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"version": "6.18.46",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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},
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{
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"version": "7.1.10",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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"references": [
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"url": "https://git.kernel.org/stable/c/cd6991001bf0681ed0bcf21f9cc3d261d749b2bb"
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"url": "https://git.kernel.org/stable/c/99a18e1d979e0fad3aaf9c65ae6696897c1d9869"
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}
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],
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"title": "crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req()",
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"id": "CVE-2026-80522",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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"version": "2.0.3",
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"timestamp": "2026-10-16T19:16:31.536900Z"
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