Description
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: property: Reject u32 wrap in tb_property_entry_valid() entry->value is u32 and entry->length is u16; the sum is performed in u32 and wraps. A malicious XDomain peer can pick value = 0xffffff00, length = 0x100 so the sum 0x100000000 wraps to 0 and passes the > block_len check. tb_property_parse() then passes entry->value to parse_dwdata() as a dword offset into the property block, reading attacker-directed memory far past the allocation. For TEXT-typed entries with the "deviceid" or "vendorid" keys this lands in xd->device_name / xd->vendor_name and is readable back via the per-XDomain device_name / vendor_name sysfs attributes; the leak is NUL-bounded (kstrdup() stops at the first zero byte) and untargeted (the attacker picks a delta, not an absolute address). DATA-typed entries are parsed into property->value.data but not generically surfaced to userspace. Use check_add_overflow() so a wrapped sum is rejected.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
cdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < 6a63623621639acbb39bc2d9fb09559681716695affectedcdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < e8a0b0a93a6ef958e70b1dd4930beb6dc0026b36affectedcdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < 9fee50c4e1e42f6d3cbe30df584f9f648f626071affectedcdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < 8d4a758b407ab3de3be86d1ceadfa35d717d30c7affectedcdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < 5c06a3043ad944f087bb2ae0aae28d820bb9f460affectedcdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < 31b98e503ecca8077e5247253dd5425ab84bc96daffectedcdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < a47784aee77f33f786dc5d7375db821bdae68792affectedcdae7c07e3e3509eaabc18c1640a55dc5b99c179 to < 01deda0152066c6c955f0619114ea6afa070aaecaffected
Linux Linux
Default version status: affected
4.15affected0 to < 4.15unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.176 to ≤ 6.1.*unaffected6.6.143 to ≤ 6.6.*unaffected6.12.93 to ≤ 6.12.*unaffected6.18.35 to ≤ 6.18.*unaffected7.0.12 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/6a63623621639acbb39bc2d9fb09559681716695 ↗
- https://git.kernel.org/stable/c/e8a0b0a93a6ef958e70b1dd4930beb6dc0026b36 ↗
- https://git.kernel.org/stable/c/9fee50c4e1e42f6d3cbe30df584f9f648f626071 ↗
- https://git.kernel.org/stable/c/8d4a758b407ab3de3be86d1ceadfa35d717d30c7 ↗
- https://git.kernel.org/stable/c/5c06a3043ad944f087bb2ae0aae28d820bb9f460 ↗
- https://git.kernel.org/stable/c/31b98e503ecca8077e5247253dd5425ab84bc96d ↗
- https://git.kernel.org/stable/c/a47784aee77f33f786dc5d7375db821bdae68792 ↗
- https://git.kernel.org/stable/c/01deda0152066c6c955f0619114ea6afa070aaec ↗